NUTRITION FOR COMBAT ATHLETES
This page provides the scientific foundation for understanding performance nutrition in combat sports. It outlines the key mechanisms behind energy production, recovery, hydration, supplementation, and nutrient timing — the essential elements that support high‑intensity training and long‑term adaptation.
It is designed for fighters, coaches, and practitioners who want clear, structured, evidence‑based information they can apply immediately. These principles form the base for the practical strategies explored across the rest of the site, ensuring that every decision is guided by physiology rather than guesswork.
Whether you’re preparing for competition, coaching athletes through demanding cycles, or building your own knowledge, this page offers a grounded, accessible framework shaped by scientific understanding, practical experience, and a commitment to athlete well‑being.
Quick Access
Tap to jump to a section:
Prefer a single document?
Open the full PDF
A practical nutrition guide for combat‑sport athletes, covering fuelling, recovery, hydration, and weight‑class preparation. Coaches can use it to reinforce consistent habits and training readiness.
Nutrition and Performance in Sport
Nutrition is a decisive factor in athletic performance. Even small improvements can lead to measurable gains in strength, conditioning, and body composition. In combat sports, weight cutting is common, but when paired with poor nutritional awareness it often results in inappropriate weight loss, reduced physical capacity, and diminished performance (Sung, 2022).
Adequate energy intake supports:
-
Recovery
-
Fatigue management
-
Reduced risk of injury and illness
(Papadopoulou, 2020).
Measurement and Estimation of Energy Requirements
Understanding how the body uses energy is essential for planning training, recovery, and weight management. This section outlines the components of daily energy expenditure and the methods used to estimate an athlete’s energy needs.
Total Daily Energy Expenditure (TDEE)
TDEE is made up of three main components that together represent the body’s total daily energy use.
Resting Energy Expenditure (REE) accounts for roughly 60% of daily energy use (Levine, 1999) and supports essential functions such as:
-
Breathing
-
Circulation
-
Cellular maintenance
(Schofield, 2019).
Physical Activity Energy Expenditure (PAEE) represents around 30% of TDEE, depending on training load and daily movement.
Thermic Effect of Food (TEF) contributes approximately 10% of TDEE (Levine, 2005).
TDEE reflects the total energy required for:
-
Growth and development
-
Reproductive processes
-
Cognitive function
-
Digestion
-
Physical activity
-
Immune responses
(Fernandez‑Verdejo, 2024).
Energy Availability (EA)
Energy availability reflects how much dietary energy remains for essential physiological functions after training demands are met. This section highlights why maintaining adequate EA is critical for both health and performance.
Definition: EA = dietary energy intake − exercise energy expenditure
Low EA negatively affects:
-
Endocrine function
-
Cardiovascular health
-
Metabolism
-
Immune function
-
Gastrointestinal health
-
Reproductive systems
(Wasserfurth, 2020).
Methods of Measuring Energy Expenditure
Accurately assessing energy expenditure helps athletes and coaches tailor nutrition to training demands. This section outlines the scientific methods used to measure or estimate energy use in sport.
Energy expenditure can be assessed using:
-
Direct calorimetry – measurement of heat production
-
Heart rate monitoring – intensity‑based estimation of oxygen use
-
Indirect calorimetry – oxygen uptake and CO₂ output measured via spirometry (Weir formula) (Braun, 2020; Schrack, 2014; Weir, 1949).
REE is widely used to estimate daily calorie needs and to support training or weight‑related goals.
Energy Sources and Transport
Efficient performance depends on the body’s ability to transport nutrients, oxygen, and hormones to working tissues. This section explains how the circulatory and endocrine systems support energy delivery during physical activity.
Blood Transport
Blood plays a central role in delivering the substrates required for energy production and in removing metabolic waste.
Its functions include:
-
Transporting oxygen from the lungs to tissues
-
Delivering carbohydrates, fats, proteins, and micronutrients absorbed from the small intestine
-
Carrying hormones released by endocrine glands
-
Removing carbon dioxide, lactate, and other metabolic by‑products.
Nutrient absorption occurs through the capillaries of the small intestine, where slower blood flow allows efficient exchange between blood and cells. This process is essential for maintaining energy availability during exercise (Guyton and Hall, 2021; Hall and Hall, 2020).
During physical activity, the cardiovascular system adapts by increasing cardiac output, redistributing blood flow to active muscles, and enhancing oxygen delivery — all of which support ATP production (Joyner and Casey, 2015).
Hormones and Metabolic Regulation
Hormones act as chemical messengers that regulate energy metabolism, growth, recovery, and overall physiological balance.
They influence:
-
Glucose uptake and utilisation (insulin, glucagon)
-
Fat mobilisation (adrenaline, noradrenaline, cortisol)
-
Protein synthesis and muscle repair (growth hormone, testosterone)
-
Metabolic rate (thyroid hormones)
-
Fluid and electrolyte balance (aldosterone, antidiuretic hormone) (Calcaterra, 2024; Szivak, 2025).
During exercise, the endocrine system adjusts hormone secretion to meet energetic demands.
For example:
-
Adrenaline and noradrenaline increase heart rate and stimulate glycogen breakdown
-
Cortisol supports gluconeogenesis and fat mobilisation during prolonged activity
-
Insulin levels decrease, allowing muscles to access stored fuels more efficiently
-
Glucagon increases, promoting glucose release from the liver
-
Growth hormone rises, supporting tissue repair and fat metabolism
-
Thyroid hormones regulate metabolic rate and mitochondrial activity.
Through their combined effects on glucose availability, fat mobilisation, and metabolic rate, these hormonal adjustments help sustain the production of adenosine triphosphate (ATP), the primary energy currency required for ongoing muscular work during training (Brooks, 2005; Morton, 2016).
Mitochondrial Fuel Delivery
ATP is the body’s immediate source of usable energy. This section explains how mitochondria convert nutrients into ATP and how physiological factors influence energy production.
The transport of nutrients and oxygen to muscle cells directly affects mitochondrial ATP output.
Adequate blood flow and hormonal signalling ensure that:
-
Glucose enters cells via insulin‑regulated GLUT‑4 transporters
-
Fatty acids are mobilised and transported through albumin and carnitine pathways
-
Amino acids are available for repair and, when necessary, energy production (Churchward‑Venne, 2020; Fernandez-Verdejo, 2024).
ATP Storage in the Body
Skeletal muscle contains only a very small, rapidly depleted store of ATP — typically enough for:
-
1–2 seconds of maximal effort
-
Approximately 5–6 mmol ATP per kg of wet muscle
Modern reviews confirm that ATP storage capacity is extremely limited and must be regenerated continuously during exercise (Hargreaves and Spriet, 2018; Hargreaves and Spriet, 2020; Yalcinkaya, 2023).
ATP Turnover and Regeneration
During high‑intensity exercise, ATP turnover can increase more than 100‑fold compared to resting levels (Egan and Sharples, 2023; Hargreaves and Spriet, 2020). Because ATP stores are so limited, the body must regenerate ATP almost instantly through three primary energy systems.
Phosphocreatine (PCr) System
-
Provides ATP for the first 6–10 seconds of maximal effort
-
PCr stores are ~70% restored within 30 seconds
-
Full restoration occurs within 3–5 minutes.
Recent work confirms these classic values and highlights PCr resynthesis as a key determinant of repeated‑sprint performance (Klepochova, 2024; Singh, 2025).
Anaerobic Glycolysis
-
Supports ATP production for 10–120 seconds of high‑intensity work
-
Rapid but produces lactate and hydrogen ions
-
Recovery depends on lactate clearance and pH normalisation.
Modern reviews emphasise glycolysis as a critical bridge between PCr depletion and oxidative metabolism (Brooks, 2020; Emhoff and Messonnier, 2023; Mandadzhiev, 2025).
Oxidative Phosphorylation
-
Dominant ATP source during sustained, lower‑intensity exercise
-
Slower to activate but capable of producing ATP for hours
-
Highly dependent on oxygen delivery and mitochondrial density (Hargreaves and Spriet, 2020; Usher and Babraj, 2024).
Why ATP Regeneration Matters for Athletes
Because ATP stores are so limited, performance depends on:
-
Efficient substrate delivery (glucose, fatty acids, oxygen)
-
Rapid PCr resynthesis between efforts
-
Mitochondrial capacity to sustain ATP output
-
Hormonal regulation that supports substrate mobilisation.
These processes collectively determine how efficiently the body can generate energy during training and competition.
Energy Sources and Fueling
This section explains how different nutrients support training, recovery, and performance in combat sports, and how athletes can fuel effectively across varying intensities and demands.
Macronutrients
Carbohydrates
Daily carbohydrate intake is one of the most important nutritional factors influencing training quality, recovery, and competition performance in athletes. Carbohydrates provide approximately 4 kcal/g (Merrill and Watt, 1955), although 5–10% of this energy is lost due to incomplete gastrointestinal digestion and absorption (Basolo, 2020). Once absorbed, carbohydrates are oxidised to resynthesise ATP or stored as glycogen in the liver and skeletal muscle. Adequate carbohydrate availability is essential for maintaining training intensity, supporting recovery, and preventing the negative physiological consequences associated with low energy intake (Cermak, 2013).
Primary Fuel for High‑Intensity Work
Carbohydrates are the dominant fuel source for moderate‑to‑high‑intensity exercise and resistance training. Combat sports rely heavily on rapid ATP turnover, glycolysis, and repeated explosive efforts — all of which depend on sufficient glycogen availability. Maintaining liver glycogen stores of 80–100 g and skeletal muscle glycogen stores of 300–400 g is essential for sustaining performance (Hargreaves and Spriet, 2020; Richter, 2021).
Low pre‑exercise glycogen levels contribute to:
-
premature fatigue
-
reduced training intensity
-
impaired muscle contraction
-
disrupted glycogenolysis
-
increased protein breakdown
(Podlogar and Wallis, 2022).
Consuming a carbohydrate‑rich meal or snack before training helps ensure optimal glycogen availability and supports high‑quality performance (Ghazzawi, 2023a).
Supports Glycolysis and Repeated‑Sprint Performance
Combat sports involve intermittent bursts of high‑intensity activity separated by short recovery periods. Once phosphocreatine (PCr) stores decline, glycolysis becomes the primary ATP source — making carbohydrate availability critical for:
-
repeated striking combinations
-
explosive takedown attempts
-
scrambles and transitions
-
pad‑work intervals
-
conditioning circuits.
Athletes who begin training with low glycogen experience reduced power output, slower reaction time, and impaired technical execution — all detrimental to combat‑sport performance (Kerksick, 2018).
Glycogen Storage, Depletion, and Replenishment
Glycogen is rapidly depleted during:
-
sparring
-
pad work
-
grappling exchanges
-
multi‑session training days.
During the first 6 hours after exercise, the body actively restores depleted glycogen. Rapid resynthesis is achieved by consuming 1.0–1.5 g/kg/hour of carbohydrate, ideally in 30‑minute intervals, for up to 6 hours post‑exercise (Bishop, 2008; Jentjens and Jeukendrup, 2003; Saunders, 2007). Full restoration typically requires 24 hours of adequate carbohydrate intake (Ryan, 2012).
Athletes training 2–3 hours per day, five to six days per week, require significantly higher energy intake — often 40–70 kcal/kg/day — to maintain glycogen stores and support recovery (Heydenreich, 2017). Failure to meet these demands contributes to low energy availability and its associated physiological and psychological consequences (Burke, 2006).
Recommended Daily Carbohydrate Intake
General fitness exercise (<60 minutes/day) does not require additional carbohydrate intake beyond a normal diet containing 45–55% carbohydrates.
For athletes, carbohydrate needs scale with training intensity:
-
Low intensity (<60 min/day): 3–5 g/kg/day
-
Moderate intensity (~60 min/day): 5–7 g/kg/day
-
High intensity (60–180 min/day): 6–10 g/kg/day
-
Very high intensity (>180 min/day): 8–12 g/kg/day
(Konig, 2020; Reinhard and Galloway, 2022).
Combat Sport Specific Needs
High‑Intensity Intermittent Actions
Striking, scrambling, and explosive transitions rely on glycolysis and ATP‑PCr — both carbohydrate‑dependent.
Multiple Daily Sessions
High‑volume training increases carbohydrate requirements dramatically. Many athletes struggle to consume enough food to match expenditure (Viner, 2015).
Weight‑Class Constraints
Carbohydrate restriction during weight cuts can lead to:
-
negative energy balance
-
hormonal fluctuations
-
reduced training quality
-
impaired recovery
-
increased risk of eating disorders
(Melin, 2016).
Appetite Suppression After Intense Training
High‑intensity exercise can reduce appetite, contributing to skipped meals and inadequate fuelling (Melin, 2015).
Individualisation
Carbohydrate strategies must be personalised based on training load, body composition goals, and competition schedule (Page, 2020).
Protein
Recommended Protein Intake
Different training goals require different protein intakes. Evidence‑based ranges include:
-
Muscle mass building/preservation: 1.4–2.0 g/kg/day
-
Endurance training: 1.2–2.0 g/kg/day
-
Strength training: 1.6–2.8 g/kg/day
-
Gaining strength: 1.6–2.2 g/kg/day
-
During caloric deficit (cutting): 2.3–3.1 g/kg/day
(LaPelusa and Kaushik, 2022; Stokes, 2018).
Higher ranges during caloric deficit are especially important for combat athletes who must maintain lean mass while reducing body weight.
Protein Quality and Digestibility
Protein quality is determined by amino acid composition, digestibility, and leucine content. Animal proteins generally provide:
-
higher digestibility
-
complete amino acid profiles
-
more efficient amino acid transport
Plant‑based proteins often require:
-
higher total intake
-
blending multiple sources
-
careful timing
(Pinckaers, 2021; van Vliet, 2020).
Plant‑based diets can still support high performance but require more deliberate planning.
Leucine Threshold for MPS
Muscle protein synthesis is maximised when a meal contains 2–3 g of leucine, typically found in:
-
20–40 g of high‑quality animal protein
-
30–50 g of blended plant proteins
(Churchward‑Venne, 2020; Morton, 2018; Pinckaers, 2023).
Protein Distribution Across the Day
Even distribution across 3–5 meals stimulates more MPS than irregular intake:
-
0.25–0.40 g/kg per meal
-
spaced every 3–4 hours
(Aoyama, 2021; Hudson, 2020).
Pre‑Sleep Protein for Overnight Recovery
Consuming 30–40 g of casein before sleep enhances overnight MPS and supports hypertrophy (Reis, 2021; Trommelen, 2023).
Protein Timing
While total daily intake is most important, consuming protein:
-
within 2 hours post‑training
-
or evenly spaced throughout the day optimises MPS and recovery
(Lak, 2024; Morton, 2018; Zhou, 2023).
Protein During Caloric Deficit
Higher protein intake (2.3–3.1 g/kg/day) preserves lean mass during caloric restriction — essential for combat athletes making weight
(Januszko and Lange, 2021; Moon and Koh, 2020; Ogilvie, 2022).
Combat Sport Specific Application
For Striking Athletes
Supports power output, speed, neuromuscular recovery, and lean mass maintenance.
For Grapplers and Wrestlers
Reduces muscle damage from isometric holds and supports grip‑intensive work.
For Strength and Conditioning
Blocks 1.6–2.8 g/kg/day supports hypertrophy and strength development.
For Weight‑Cut Phases
Increase protein to 2.3–3.1 g/kg/day to preserve muscle while reducing calories.
For Tournament Days
Small, frequent protein doses maintain satiety and muscle function.
For Coaches
Encourage even distribution and monitor intake during cutting phases.
Clear Takeaway
Protein is essential for recovery, performance, weight management, and long‑term athlete health. Combat athletes must prioritise both total intake and timing to maximise training adaptation.
Fat
Dietary fat is an essential macronutrient for athletes. Beyond providing 9 kcal/g, fat supports cardiovascular health, hormone production, immune function, and the absorption of vitamins A, D, E, and K. Adequate fat intake also supplies essential fatty acids that the body cannot synthesise (Ghazzawi, 2023b; Thomas, 2016).
Fat intake plays a key role in maintaining energy balance, supporting metabolic flexibility, and sustaining performance during prolonged or lower‑intensity sessions. Insufficient fat intake can impair hormonal function, reduce energy availability, and negatively affect recovery and mood.
Types of Dietary Fat
Saturated Fat
Found in fatty meats, butter, ghee, cream, cheese, and coconut/palm oils. High intake is associated with elevated LDL cholesterol and increased cardiovascular risk. Should be limited to <10% of daily calories.
Unsaturated Fat
Generally heart‑healthy and anti‑inflammatory.
Monounsaturated Fats
Found in olive oil, avocados, nuts, and seeds. Support cardiovascular and metabolic health.
Polyunsaturated Fats (PUFAs) Include essential fatty acids:
-
Omega‑3 (EPA, DHA, ALA) — fish, flaxseed, chia, walnuts
-
Omega‑6 — sunflower oil, corn oil, nuts
Omega‑3s are particularly important for athletes due to their anti‑inflammatory and recovery‑enhancing properties (D’Angelo and Madonna, 2020; Jeromson, 2015).
Recommended Fat Intake
Athletes should consume 20–30% of total daily calories from fat, with saturated fat below 10% (Ghazzawi, 2023b; Thomas, 2016). This supports:
-
hormonal balance
-
energy availability
-
recovery
-
immune function
-
long‑term health
Chronic fat restriction — especially during weight cuts — can impair hormones, reduce testosterone, and increase injury risk.
Omega‑3s Improve Recovery and Reduce Inflammation
EPA and DHA supplementation can:
-
reduce muscle soreness
-
improve muscle function
-
enhance strength recovery
-
reduce inflammation
-
improve cardiac efficiency
(Blannin, 2025; Cannataro, 2024; Philpott, 2019; Tomczyk, 2024).
Omega‑3s Enhance Muscle Protein Synthesis
Omega‑3 fatty acids increase muscle sensitivity to amino acids, enhancing MPS — especially valuable during caloric deficit or injury recovery (Doussat, 2024; Therdyothin, 2025).
Fat Intake Supports Hormonal Health
Low‑fat diets (<20% of calories) can reduce testosterone and impair reproductive and metabolic hormones (Whittaker and Wu, 2021).
High‑Quality Fats Improve Cognitive Function
Omega‑3s support reaction time, decision‑making, and cognitive resilience — essential for combat sports (Andrianmeblo, 2023; Rittenhouse, 2025).
Fat Supports Metabolic Flexibility
Adequate fat intake improves the ability to switch between fat and carbohydrate oxidation, sparing glycogen during long sessions (Palmer and Clegg; Prins, 2023).
Combat Sport Specific Application
For Striking Athletes
Omega‑3s reduce joint inflammation and support cognitive sharpness.
For Grapplers and Wrestlers
Support joint health and hormonal balance during heavy training.
For Conditioning and Endurance Work
Fat improves metabolic flexibility and delays fatigue.
For Weight‑Cut Phases
Avoid dropping fat too low — <20% impairs hormones and recovery.
For Tournament Days
Small amounts of healthy fats stabilise energy but avoid high‑fat meals close to competition.
For Coaches
Monitor athletes who under‑consume fat, especially females.
Clear Takeaway
Fat is essential for energy, hormones, recovery, and long‑term health. Combat athletes must consume enough high‑quality fats to support performance and resilience.
Micronutrients
Micronutrients — vitamins and minerals — are essential for sustaining life, supporting physiological function, and enabling optimal athletic performance. Because the human body cannot synthesise them, they must be obtained through diet (Beck, 2021). Micronutrients contribute to growth, development, immune function, reproductive health, and energy metabolism, making them indispensable for combat‑sport athletes with high physiological demands.
Vitamins
Vitamins are organic compounds that function as co‑enzymes, antioxidants (e.g., vitamin C), hormones (e.g., vitamin D), and regulators of energy production (e.g., B‑vitamins) (Beck, 2021).
There are thirteen essential vitamins, divided into:
Fat‑soluble vitamins (A, D, E, K)
Stored in body tissues; absorbed with dietary fat.
Water‑soluble vitamins (B‑complex and vitamin C)
Not stored extensively; require regular intake (Mason, 2020).
These vitamins support metabolic pathways, immune function, bone health, and neuromuscular performance — all critical for athletes.
Minerals
Minerals are inorganic micronutrients essential for enzyme structure, cellular energy transduction, oxygen transport, and neuromuscular function (Stathopoulou, 2012).
During exercise, minerals help maintain:
-
normal heart rhythm
-
antioxidant defence
-
bone strength
-
immune function
-
oxygen uptake and utilisation
(Beck, 2021; Littlejohn, 2023).
Microminerals are required in amounts around 100 mg/day, while trace elements are needed in ~20 mg/day (Fogelholm, 2015).
Micronutrient Deficiencies in Athletes
Athletes are at increased risk of deficiencies due to:
-
low‑energy diets
-
weight‑cutting practices
-
vegetarian/vegan diets
-
illness
-
high sweat losses
-
injury or overtraining
(Bytomski, 2018; Ghazzawi, 2023; Kong and Harris, 2015; Porgieter, 2013).
Deficiencies impair performance, recovery, cognition, and hormonal balance.
Key Micronutrients for Athletic Performance
Vitamin D Enhances Strength and Resilience
Improves:
-
muscle strength
-
reaction time
-
immune resilience
-
testosterone regulation
-
injury reduction
(Dominguez, 2025; Lechner, 2022).
Iron Deficiency Impairs VO₂max and Cognition
Iron deficiency — even without anaemia — reduces:
-
aerobic capacity
-
mitochondrial efficiency
-
decision‑making speed
-
training quality
(Kardasis, 2023; Keller, 2024; Solberg and Reikvam, 2023).
Magnesium Supports Recovery and Sleep
Improves:
-
musculoskeletal health
-
sleep quality
-
recovery from high‑intensity training
-
glucose metabolism
(Dominguez, 2025; Liguori, 2024).
B‑Vitamins Enhance Energy Metabolism
Insufficiency reduces:
-
carbohydrate metabolism
-
red blood cell formation
-
neuromuscular coordination
-
post‑exercise recovery
exercise endurance (Krzywanski, 2020; Lee, 2023).
Zinc and Selenium Support Immunity and Repair
Zinc deficiency impairs protein synthesis and immune resilience; selenium supports antioxidant defence and muscle recovery (Clemente‑Suarez, 2023; Wang, 2025).
Electrolytes Are Critical for Combat Sports
High sweat rates increase losses of sodium, potassium, magnesium, and chloride. Imbalance reduces reaction time, endurance, and cognitive sharpness (Arnaoutis and Neophutou, 2025; Keefe, 2024).
Micronutrient Recommendations and Roles
Vitamin A
Intake: 900 µg (males), 700 µg (females)
Sources: beef liver, sweet potato, carrot
Role: response time, muscle recovery, fatigue reduction
Vitamin E
Intake: 15 µg
Sources: almonds, cereals, sunflower seeds
Role: antioxidant protection, immune support
Vitamin D
Intake: 1550–2000 IU
Sources: salmon, sardines, cod, mushrooms
Role: inflammation reduction, protein synthesis, performance
Vitamin K
Intake: 120 µg (males), 90 µg (females)
Sources: spinach, kale, parsley
Role: bone mineralisation
Vitamin B1 (Thiamine)
Intake: 1.2 mg (males), 1.1 mg (females)
Sources: bacon, sunflower seeds, cereals
Role: carbohydrate and amino acid metabolism
Vitamin B2 (Riboflavin)
Intake: 1.3 mg (males), 1.1 mg (females)
Sources: meat, eggs, dairy
Role: energy production
Vitamin B3 (Niacin)
Intake: 16 mg (males), 14 mg (females)
Sources: dairy, meat, whole grains
Role: metabolic support
Vitamin B5 (Pantothenic Acid)
Intake: 5 mg
Role: aerobic performance
Vitamin B6 (Pyridoxine)
Intake: 1.3 mg
Sources: beef liver, meat, fish
Role: muscle growth, strength, cognition
Vitamin B9 (Folic Acid)
Intake: 400 µg
Sources: fruits, nuts, dark greens, beans
Role: brain function, red blood cell formation
Vitamin B12 (Cobalamin)
Intake: 2.4 µg Sources: meat, poultry, fish, eggs
Role: DNA synthesis, oxygen transport
Vitamin C
Intake: 90 mg (males), 75 mg (females)
Sources: tomatoes, citrus, peppers, kiwifruit
Role: collagen production, immune support
Iron
Intake: 8 mg (males), 18 mg (females)
Sources: lean meat, seafood, beans, nuts
Role: oxygen transport, energy production
Calcium
Intake: 1500 mg
Sources: sardines, salmon, kale, dairy
Role: muscle contraction, bone health
Potassium
Intake: 3500 mg (males), 2500 mg (females)
Sources: beans, lentils, potatoes, dried fruits
Role: energy production, lactic acid buffering
Magnesium
Intake: 400 mg (males), 310 mg (females)
Sources: leafy greens, whole grains, legumes
Role: muscle function, energy metabolism
Zinc
Intake: 8 mg (males), 11 mg (females)
Sources: fish, meat, seafood
Role: protein synthesis, fast‑twitch fibre recruitment
Selenium
Intake: 55 µg
Sources: seafood, Brazil nuts, organ meats
Role: antioxidant defence
Manganese
Intake: 2.3 mg (males), 1.8 mg (females)
Sources: oysters, mussels, nuts, whole grains
Role: energy metabolism, antioxidant enzyme function
(Ghazzawi, 2023a).
Combat Sport Specific Application
For Striking Athletes
Vitamin D and magnesium improve reaction time and neuromuscular control. Antioxidants (vitamin C, E, selenium) reduce oxidative stress from repeated impacts.
For Grapplers and Wrestlers
Iron and B‑vitamins support endurance during long scrambles. Calcium and magnesium reduce cramping and support grip endurance.
For Weight‑Cut Phases
High risk of micronutrient deficiency — especially iron, zinc, magnesium, and B‑vitamins. Supplementation may be necessary to maintain performance and mood.
For Tournament Days
Electrolytes (sodium, potassium, magnesium) are essential for hydration and cognitive sharpness. Vitamin C and B‑vitamins support stress resilience and energy.
For Coaches
Monitor athletes for signs of deficiency: fatigue, slow recovery, irritability, poor focus. Encourage a varied diet rich in fruits, vegetables, whole grains, nuts, seeds, and lean proteins. Consider blood testing for iron, vitamin D, and B12 in high‑risk athletes.
Clear Takeaway
Micronutrients are foundational for energy, cognition, recovery, and resilience. Combat athletes must prioritise micronutrient‑dense foods — and supplement when necessary — to sustain peak performance.
Hydration
Hydration is one of the most important — and often overlooked — components of athletic performance. From a nutritional perspective, water is the most essential ergogenic aid available to athletes. Maintaining fluid balance supports thermoregulation, cardiovascular function, neuromuscular control, cognitive performance, and recovery. Even mild dehydration can impair exercise capacity, making proactive hydration essential for combat‑sport athletes (Sawka, 2007).
Athletes should not rely on thirst as an indicator of when to drink. Thirst is a delayed physiological response that signals the body has already lost a substantial amount of fluid through sweat and respiration (Filigrana, 2025; Palka, 2024). Hydration must therefore be planned and intentional throughout the day to maintain stable body weight and optimal performance.
A key objective immediately after training or competition is to replace lost fluids and electrolytes. This is especially important for combat‑sport athletes who train at high intensities, often in heated environments, and may experience significant sweat losses.
Effects of Dehydration on Performance
Losing 2% or more of body weight through sweat (e.g., 1.2 kg in a 60 kg athlete) significantly reduces exercise capacity. This level of dehydration can occur within 60–90 minutes of training, given typical sweat rates of 0.5–2.0 L/hour (Sawka, 2007).
More severe dehydration — 4% or more of body weight lost — dramatically increases the risk of:
-
heat exhaustion
-
acute kidney injury
-
electrolyte imbalances
-
heat illness
-
heat stroke
-
collapse
-
and in extreme cases, death
(Burke, 2021; Chapman, 2023; Maughan and Noakes, 1991; Murugappan, 2019).
Combat‑sport athletes, who often train in high‑intensity bursts and warm environments, are particularly vulnerable.
Mild Dehydration Impairs Cognitive Performance
Even 1–2% dehydration reduces:
-
reaction time
-
processing speed
-
vigilance
-
working memory
-
tactical decision‑making
-
visual tracking
(Balogun, 2025; Donnan, 2021; Dube, 2022).
Electrolyte Balance Is Essential for Neuromuscular Function
Losses of sodium, potassium, magnesium, and chloride through sweat affect:
-
muscle contraction
-
knee‑extension strength
-
cramping risk
-
nerve conduction
-
endurance capacity
(Downs, 2025; Mason, 2024; Zubac, 2020).
Hydration Status Affects Strength and Power
Dehydration of 2–3% reduces:
-
maximal strength
-
power output
-
anaerobic capacity
(Arnaoutis and Neophytou, 2025; Nihat, 2023).
Sodium Improves Rehydration and Fluid Retention
Sodium‑containing drinks improve:
-
plasma volume restoration
-
fluid retention
-
post‑exercise recovery
(Armstrong, 2021; McCubbin, 2025).
Practical Intake Guidance
Before Exercise
-
500 ml of water or sports drink the night before competition
-
500 ml upon waking
-
400–600 ml of cool water or sports drink 10–20 minutes before exercise
During Exercise
-
300–450 ml of cold water or sports drink every 5–15 minutes
-
For sessions >60 minutes: include electrolytes
-
Heavy sweaters: choose drinks containing sodium + carbohydrates
After Exercise
-
Replace 150% of fluid lost (e.g., if 1 L lost, drink 1.5 L)
-
Include sodium through electrolyte drinks or salty foods
-
Rehydrate gradually over 2–4 hours
Daily Hydration
-
Aim for 30–40 ml/kg/day
-
Monitor urine colour as a simple hydration indicator
-
Maintain stable body weight across training days
(Ayotte and Corcoran, 2018; Brouns, 1998; Bytomski, 2018; Casa, 2005; Kovacs, 2002; Maughan and Shirreffs, 2010; Pedan, 2023).
Combat Sport Specific Application
For Striking Athletes
Hydration maintains reaction time, visual tracking, and decision‑making. Prevents overheating during pad work and sparring.
For Grapplers and Wrestlers
Electrolytes reduce cramping during isometric holds and scrambles. Adequate hydration supports grip endurance and explosive transitions.
For Conditioning Sessions
Prevents early fatigue and maintains cardiovascular efficiency. Supports sustained output during long rounds or circuits.
For Weight‑Cut Phases
Controlled hydration strategies reduce risk of heat illness. Electrolyte management is essential to avoid dangerous imbalances.
For Tournament Days
Small, frequent sips maintain hydration without stomach discomfort. Sodium‑containing fluids improve fluid retention between bouts.
For Coaches
Monitor athletes for dehydration signs during high‑intensity sessions. Encourage planned hydration strategies, not reactive drinking. Track sweat rates for individualised hydration plans.
Clear Takeaway
Hydration is a performance multiplier. Even small fluid losses impair strength, power, cognition, and endurance — all essential for combat sports. Athletes must hydrate proactively, not reactively.
Supplements
Dietary supplements can support athletic performance when used appropriately, but they do not replace the foundations of health: a balanced diet, structured training, and adequate sleep (Yasuda, 2023).
Supplements should be viewed as adjuncts, not shortcuts.
Combat‑sport athletes must also consider product purity, quality, and third‑party testing to avoid contamination or banned substances (Wang, 2024). Recent analyses confirm that several supplements can be safe and effective for combat‑sport athletes when used correctly (Luo, 2025).
Arginine
L‑arginine is a non‑essential amino acid naturally produced by the body (Bean, 2015). Supplementation increases nitric oxide production, improving blood flow and exercise tolerance.
Evidence‑Based Benefits
-
Enhances aerobic and anaerobic performance
-
Improves blood lactate response
-
Supports agility and repeated‑effort performance.
Practical Guidance
-
10–11 g taken 60–90 minutes before exercise
-
Combined nitrate + arginine supplementation shows greater performance benefits
(Kavci, 2025; Viribay, 2020).
Beta‑Alanine
Beta‑alanine is a non‑essential amino acid found in poultry, fish, and red meat (Artioli, 2010; Matthews, 1987). It increases muscle carnosine, improving buffering capacity during high‑intensity exercise (Santana, 2018).
Evidence‑Based Benefits
-
Delays fatigue
-
Improves performance in efforts lasting 1–10 minutes
-
Enhances strength and power in repeated bursts.
Practical Guidance
-
3.2–6.4 g/day for 4–24 weeks
-
Split doses to reduce tingling (paraesthesia)
(Cimadevilla‑Fernandez‑Pola, 2024; Dolan, 2019; Georgiou, 2024; Matthews, 2019; Milioni, 2019).
BCAAs (Branched‑Chain Amino Acids)
Leucine, valine, and isoleucine are essential amino acids that must be obtained through diet (Gannon, 2018; Neinast, 2019). Leucine is the primary regulator of muscle protein synthesis (MPS) (Xu, 2015).
Evidence‑Based Benefits
-
Reduces post‑exercise muscle damage
-
Supports recovery
-
May improve body composition.
Practical Guidance
-
200 mg/kg/day for 10+ days to reduce muscle soreness
-
At least 2 g leucine/day helps prevent loss of muscle mass and strength
(Foure, 2017; Liu, 2025).
Bicarbonate (Baking Soda)
Bicarbonate buffers acidity during high‑intensity exercise, delaying fatigue (Kreider, 2019).
Evidence‑Based Benefits
-
Improves performance in high‑intensity and intermittent sports
-
Enhances repeated‑sprint ability
-
Supports acid‑buffering capacity.
Practical Guidance
-
300 mg/kg taken 60–90 minutes before exercise, or
-
5 g twice daily for 5 days
-
Start with lower doses to avoid gastrointestinal discomfort
(Grgic, 2020; Gurton, 2024; Hilton, 2019; Krustrup, 2015; Ragone, 2020; Siegler, 2016).
Creatine Monohydrate
Creatine monohydrate is one of the most researched and effective supplements in sport (Fazio, 2022).
Evidence‑Based Benefits
-
Increases strength and power
-
Enhances high‑intensity performance
-
Increases fat‑free mass
-
Supports ATP resynthesis.
Practical Guidance
-
Loading: 0.3 g/kg/day for 5–7 days
-
Maintenance: 0.03 g/kg/day for 4–6 weeks
(Gutierrez‑Hellin, 2025; Luo, 2020; Maughan, 2018).
Caffeine
Caffeine is a natural stimulant that enhances alertness, reaction time, and performance (Hayat, 2022).
Evidence‑Based Benefits
-
Improves technical and physical performance in combat sports
-
Enhances reaction speed and tactical decision‑making
-
Reduces perceived exertion.
Practical Guidance
-
3–4 mg/kg taken 30–60 minutes before exercise
(Chen, 2016; Fernandez, 2021; Filip‑Stachnik, 2021).
Nitrates
Found in beetroot and red spinach, nitrates convert to nitric oxide, improving oxygen efficiency (Senefeld, 2020).
Evidence‑Based Benefits
-
Reduces oxygen cost of exercise
-
Improves endurance and tolerance
-
Enhances repeated‑effort performance.
Practical Guidance
-
50–75 mg nitrates
-
Taken 90–180 minutes before exercise
-
Best consumed with vitamin C to enhance conversion
(de Oliveira, 2020; Haynes, 2021; San Juan, 2020).
Collagen
Collagen is the most abundant structural protein in the body, constituting 25–30% of all proteins (Holwerda, 2022).
Evidence‑Based Benefits
-
Supports tendon and ligament health
-
Reduces joint pain
-
Enhances adaptation to strength and endurance training
-
Improves muscular recovery
-
Contributes to explosive strength.
Practical Guidance
-
15 g/day with vitamin C
-
Minimum 8‑week adaptation period
-
Effective for tendon‑related injuries
(Bischof, 2023; Bischof, 2024; Khatri, 2021; Miyamoto, 2025; Nulty, 2025).
L‑Glutamine
L‑glutamine is the most abundant amino acid in the body and supports immune function (Cruzat, 2018).
Evidence‑Based Benefits
-
Reduces muscle damage
-
Supports immune recovery
-
Enhances post‑exercise recovery in combat sports.
Practical Guidance
-
0.3–0.4 g/kg/day
-
Best taken after exercise
-
Supports recovery of arms, legs, and eccentric movements
(Lu, 2023; Lu, 2024; Trivedi, 2022; Wismanadi, 2024).
Combat Sport Specific Application
For Striking Athletes
-
Caffeine improves reaction time and technical precision
-
Beta‑alanine and bicarbonate enhance repeated striking bursts
-
Creatine supports explosive power for combinations.
For Grapplers and Wrestlers
-
Creatine improves grip strength and scrambles
-
Beta‑alanine delays fatigue during isometric holds
-
Collagen supports tendon resilience under joint stress.
For Weight‑Cut Phases
-
Avoid stimulants that increase dehydration
-
Prioritise electrolytes, collagen, and glutamine for recovery.
For Tournament Days
-
Caffeine enhances alertness and tactical decision‑making
-
Nitrates improve endurance across multiple bouts.
For Coaches
-
Monitor third‑party tested supplements
-
Track individual responses
-
Reinforce that supplements support — not replace — nutrition, rest, and training.
Clear Takeaway
Supplements can enhance performance, recovery, and training quality — but only when built on a foundation of solid nutrition, structured training, and adequate sleep. Combat‑sport athletes benefit most from evidence‑based supplements such as creatine, beta‑alanine, caffeine, nitrates, bicarbonate, collagen, glutamine, and targeted amino acids, each supporting specific physiological demands of striking, grappling, and high‑intensity conditioning.
However, supplements should be used deliberately: correct dosage, timing, and product quality are essential, and athletes should prioritise third‑party tested options to avoid contamination or banned substances. When applied strategically, supplements act as performance multipliers — helping fighters train harder, recover faster, and compete with greater resilience — but they are never a substitute for disciplined daily habits.
Nutrient Timing
Nutrient timing refers to the strategic planning of when athletes consume whole foods, fortified foods, and supplements to optimise performance, recovery, and long‑term adaptation (Kerksick, 2017).
Many combat athletes unintentionally under‑fuel around training — especially with carbohydrates — which reduces power output, slows recovery, and increases fatigue. Effective nutrient timing ensures that the right fuel is available before, during, and after training, depending on session duration, intensity, and food access (Lundstrom, 2025).
Sports nutritionists typically recommend 4–6 nutrient‑dense meals per day, supported by snacks to maintain energy availability and stable blood glucose (Taylor, 2020). Eating regularly throughout the day — and especially around training — remains one of the most reliable strategies to maximise performance (Arent, 2020).
Pre‑Exercise Nutrition
The pre‑exercise window extends up to 4 hours before training, allowing athletes to top up glycogen stores and ensure accessible fuel for high‑intensity work (Amawi, 2024b).
Key Principles
Consume a carbohydrate‑rich meal or snack 1–4 hours before training. Prioritise easily digestible carbohydrates such as:
-
whole‑grain cereals
-
whole‑wheat toast
-
low‑fat yoghurt
-
brown rice
-
fruit
-
vegetables
-
whole‑grain pasta.
Avoid high‑fat and high‑protein meals immediately before training, as they slow digestion and divert blood flow away from working muscles.
Recommended Intake
1–4 g/kg of carbohydrates for endurance or high‑volume sessions (American Heart Association, 2025; Naderi, 2023; Nhung and Khanh, 2023; Thomas, 2016; Zdzieblik, 2024).
Combat Sport Application
-
Ideal for morning pad work, sparring, or conditioning
-
Supports reaction time, power output, and technical sharpness
-
Prevents early fatigue during high‑intensity bursts.
During‑Exercise Nutrition
For sessions lasting longer than 60 minutes, athletes may benefit from consuming carbohydrates — and in some cases carbohydrate‑protein beverages — to maintain endurance and performance (Nhung and Khanh, 2023).
Recommended Fuel Sources
-
honey
-
raisins
-
bananas
-
commercial gels
-
sports drinks.
Carbohydrate Intake
60–90 g per hour and avoid excessive fructose or fibre, which can cause gastrointestinal distress (Close, 2022; Jeukendrup, 2017; Reynolds, 2022).
Combat Sport Application
-
Useful during long conditioning blocks, extended sparring rounds, or multi‑session training days
-
Helps maintain power output and technical precision.
Post‑Exercise Nutrition
Post‑exercise nutrition is essential for reducing injury risk, supporting recovery, and preparing for the next session (Bird, 2024; Bonilla, 2020). The period immediately after training is when the body is most responsive to carbohydrate intake and muscle repair.
The Anabolic Window
The first 0–60 minutes after training is the optimal period to enhance muscle protein synthesis and accelerate recovery. This window overlaps with the early phase of glycogen restoration, when the body is primed to absorb and store carbohydrate rapidly (Arent, 2020; Burke, 2017; Castanho, 2023).
Recommended Intake
Protein: consume a protein‑rich meal or snack within 30 minutes Carbohydrates: follow with a carbohydrate‑rich meal in the hours after training to replenish glycogen.
Recovery Ratios and Intake
-
1–1.2 g carbohydrates/kg or 0.8 g carbohydrates/kg/hour
-
0.3–0.4 g protein/kg/hour within the first 4 hours
-
Early recovery is most effective with frequent small feedings
-
Adequate total energy intake is essential — glycogen cannot be restored efficiently in a calorie deficit
(Alghannam, 2016; Alghannam, 2018; 2020; Burke, 2017; Castanho, 2023; Churchward‑Venne, 2020; Nhung and Khanh, 2023).
Combat Sport Application
-
Essential for athletes training twice per day
-
Supports muscle repair after striking, grappling, and conditioning
-
Reduces soreness and improves readiness for the next session.
Multi‑Session Training Days
Combat athletes often train 2–3 times per day, making nutrient timing a critical performance variable.
Key Strategies
-
Prioritise rapid refuelling between sessions
-
Use high‑GI carbohydrates for quick glycogen restoration
-
Include 20–30 g protein in each meal/snack
-
Hydrate consistently with electrolytes (Areta, 2013; Burke, 2017; Ivy, 2015; Jager, 2017).
Combat Sport Application
-
Maintains performance across pad work, grappling, and conditioning
-
Prevents cumulative fatigue
-
Supports technical quality in later sessions
-
Enhances readiness for evening sparring or conditioning blocks (Mattson, 2025; Naderi, 2025).
Tournament Day Timing
Tournament days require precise timing to maintain energy, cognitive sharpness, and reaction speed across repeated bouts.
Guidelines
-
Small, frequent carbohydrate‑rich meals to maintain blood glucose
-
Avoid heavy fats and fibre to reduce GI load
-
Use sports drinks for rapid energy and central nervous system support
-
Maintain hydration without stomach discomfort (Casa, 2010; Cermak and van Loo, 2013; Meeusen, 2014; Sawka, 2015).
Combat Sport Application
-
Supports repeated matches
-
Maintains reaction time and decision‑making
-
Prevents energy crashes between bouts.
GI Distress and Practical Food Choices
To avoid gastrointestinal discomfort:
-
Limit high‑fibre foods before training
-
Avoid excessive fructose
-
Avoid over‑concentrated carbohydrates on fight day
-
Choose low‑fat, low‑fibre, easily digestible carbohydrates
-
Test all foods in training — never experiment on fight day (Close, 2022; Costa, 2017; Jeukendrup, 2017; Pfeiffer, 2012; Rehrer, 1992; Reynolds, 2022).
Nutrient Timing Summary
Pre‑exercise (1–4 hours):
-
1–4 g/kg carbohydrates
-
Whole grains, fruit, yoghurt, rice, pasta
-
Avoid high‑fat and high‑protein meals.
During exercise (>60 minutes):
-
60–90 g carbohydrates/hour
-
Gels, sports drinks, honey, raisins, bananas.
Post‑exercise (0–60 minutes):
-
20–30 g protein immediately
-
1–1.2 g/kg carbohydrates within 4 hours
-
Combine carbs + protein for rapid recovery.
Multi‑session days:
-
High‑GI carbs between sessions
-
20–30 g protein per meal/snack
-
Consistent hydration with electrolytes.
Tournament days:
-
Small, frequent carbohydrate meals
-
Avoid heavy fats and fibre
-
Maintain hydration without bloating.
Clear Takeaway
Nutrition is a performance system, not an accessory. For combat athletes, it determines how well they fuel high‑intensity work, recover between sessions, maintain strength during weight cuts, and adapt to long training cycles. Adequate energy intake, balanced macronutrients, micronutrient sufficiency, hydration, and strategic timing form the foundation that allows fighters to train hard, stay healthy, and perform with consistency.
When these elements are aligned with training demands, athletes maintain power, cognitive sharpness, resilience, and long‑term progress.
Practical Takeaways for Coaches
Fuel training quality
-
Ensure athletes begin sessions with adequate carbohydrate availability
-
Encourage pre‑training snacks for evening sessions
-
Avoid fasted high‑intensity work unless intentionally programmed.
Support recovery
-
Combine carbohydrates + protein within the first hours after training
-
Reinforce hydration and electrolyte replacement after heavy sessions
-
Promote regular eating patterns to maintain energy availability.
Plan around training load
-
Increase carbohydrate intake on high‑intensity or multi‑session days
-
Reduce slightly on low‑intensity days without compromising recovery
-
Adjust fuelling strategies during weight‑cut phases to protect performance.
Monitor hydration
-
Teach athletes to hydrate proactively, not reactively
-
Track sweat rates for individualised hydration plans
-
Use electrolytes during long or hot sessions.
Protect athlete health
-
Watch for signs of low energy availability: fatigue, irritability, slow recovery
-
Encourage micronutrient‑dense foods; consider blood tests for iron, vitamin D, B12
-
Avoid extreme dieting or rapid weight‑loss practices.
Use supplements strategically
-
Prioritise evidence‑based options: creatine, beta‑alanine, caffeine, nitrates, bicarbonate, collagen, glutamine
-
Reinforce third‑party tested products only
-
Treat supplements as additions — never replacements for food, sleep, or training structure.
Practical Takeaways for Athletes
Fuel for performance
-
Eat regular meals (4–6/day) with carbohydrates at each
-
Use simple carbs before training for energy and after training for recovery
-
Increase intake on days with sparring, conditioning, or double sessions.
Protein for repair
-
Aim for 1.6–2.2 g/kg/day (higher during weight cuts)
-
Spread protein evenly across meals
-
Include a pre‑sleep protein source for overnight recovery.
Hydrate deliberately
-
Drink throughout the day — don’t wait for thirst
-
Use electrolytes during long or intense sessions
-
Replace 150% of fluid lost after training.
Micronutrients matter
-
Eat a variety of fruits, vegetables, whole grains, nuts, seeds, and lean proteins
-
Pay attention to iron, vitamin D, magnesium, and B‑vitamins
-
Use supplements only when needed and tested for purity.
Time your nutrition
-
Pre‑training: carbs + small protein, low fat, low fibre
-
During long sessions: 60–90 g carbs/hour
-
Post‑training: protein immediately, carbs in the following hours
-
Multi‑session days: rapid refuelling between sessions.
Tournament days
-
Small, frequent carbohydrate meals
-
Avoid heavy fats and fibre
-
Maintain hydration without bloating
-
Use familiar foods only — never experiment on fight day.
Summary
Combat‑sport nutrition is built on five pillars:
-
Energy availability — enough fuel to support training and physiological function.
-
Macronutrients — carbohydrates for intensity, protein for repair, fats for hormones and health.
-
Micronutrients — vitamins and minerals that support metabolism, cognition, and resilience.
-
Hydration — essential for strength, power, reaction time, and thermoregulation.
-
Nutrient timing — aligning intake with training demands to maximise performance and recovery.
When these elements are applied consistently, athletes train harder, recover faster, maintain technical quality under fatigue, and approach competition with confidence and readiness.