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Nutrition Across Training Phases

Nutrition is not a static prescription. It is a dynamic system that must evolve alongside the athlete’s training load, recovery needs, and competitive schedule. Across a full training year, the demands placed on a combat sport athlete shift dramatically — from high‑volume technical work, to strength development, to intense conditioning, to tapering and weight‑making. Nutrition must adapt with equal precision.

This page outlines how nutritional strategies change across phases, how they support physiological adaptation, and how they integrate with the other pillars of performance. When applied with clarity and structure, phase‑based nutrition becomes a tool that enhances training quality, accelerates recovery, and supports consistent performance expression across the entire season.

The Purpose of Phase‑Based Nutrition

Training stress is never constant across a combat‑sport season. Volume, intensity, technical load, and energy‑system emphasis all shift as the athlete moves from early preparation to mid‑camp, late‑camp, fight week, and post‑fight recovery. Nutrition must adapt with equal precision. When intake remains static while training demands change, athletes either under‑fuel and compromise adaptation, or over‑restrict and impair recovery, strength, and technical quality.

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Phase‑based nutrition aligns fuelling with the physiological goals of each block. Higher‑volume phases require greater energy availability to support technical learning and aerobic development. Strength‑focused phases demand consistent protein intake and sufficient carbohydrate to maintain training quality. High‑intensity conditioning phases rely on strategic carbohydrate periodisation to support repeatability and recovery. Late‑camp phases require careful management of energy intake to balance performance with weight‑making.

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This approach prevents the common pitfalls of combat sport preparation: chronic low energy availability, unnecessary fatigue, reduced training quality, and impaired decision‑making. By adjusting nutrition to match the purpose of each phase, athletes maintain health, support adaptation, and arrive at competition prepared to express their skills at the highest level.

Core Nutritional Levers Across All Phases

Even as nutrition shifts across the training year, three foundational levers remain constant. These principles anchor every phase and ensure the athlete’s physiology is supported regardless of training emphasis.

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Energy Availability

The baseline requirement for health, recovery, and adaptation. Adequate energy availability supports hormonal balance, immune function, training quality, and long‑term performance. Across all phases, the goal is to avoid chronic under‑fueling while adjusting intake to match training load and body‑composition goals.

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Macronutrient Distribution

Carbohydrate, protein, and fat intake must reflect the athlete’s training demands. Carbohydrates support high‑intensity work and technical quality. Protein underpins muscle repair, strength development, and recovery. Fats support hormonal health and provide essential energy during lower‑intensity phases. The balance shifts across phases, but the principles remain stable.

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Recovery and Adaptation Support

Nutrition is a tool for accelerating recovery and enhancing adaptation. This includes post‑training refuelling, hydration, micronutrient sufficiency, and strategic supplementation where appropriate. Across all phases, the goal is to support the body’s ability to adapt to training stress and maintain consistent performance.

Off-Camp Phase

Training Characteristics

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The off‑camp phase is the period after a fight and before a structured fight camp begins. Training is less intense and less frequent, with a focus on:

  • restoring health and recovery

  • rebuilding aerobic capacity

  • maintaining or improving strength and power

  • advancing technical skills without excessive fatigue

  • stabilising body mass and body composition.

Maintaining adequate energy availability during this phase is essential for hormonal health, metabolic recovery, and long‑term performance (Mountjoy, 2018).

Combat sport athletes often experience elevated fatigue, reduced vigour, and mood disturbances after prolonged training blocks, even when biochemical markers begin to normalise (Garatachea, 2012; Uddin, 2020). This reinforces the need for a genuine recovery phase before structured camp begins.

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Nutritional Priorities

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Nutrition in the off‑camp phase must support:

  • recovery from the previous camp and fight

  • restoration of energy availability

  • stabilisation of appetite and eating patterns

  • maintenance of a healthy walk‑around weight

  • preparation for the next training cycle.

Combat sport athletes frequently under‑consume carbohydrates and total energy during non‑camp periods, despite maintaining low body‑fat levels (Barcelo, 2026).

Chronic low energy availability should be avoided, as it negatively affects endocrine function, bone health, metabolic rate, and performance (Cabre, 2022; Ihle and  Loucks, 2004; Mountjoy, 2018).

Sleep quality often declines during pre‑competition periods, but off‑camp is the ideal time to restore healthy sleep patterns. Sleeping <7 hours impairs strength, reaction speed, cognitive function, and recovery (Charest and Grandner, 2020).

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Energy and Macronutrient Guidelines

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Energy Intake and Metabolism

  • Calculate the athlete’s resting metabolic rate (RMR) and total daily energy expenditure (TDEE) to establish baseline needs for body‑weight control and training support

  • Link energy intake to training volume and intensity to avoid chronic low energy availability

  • Ensure adequate energy availability (>30 kcal/kg FFM/day) to prevent RED‑S (Relative Energy Deficiency in Sport) and metabolic suppression (Ihle and Loucks, 2004; Woods, 2017)

  • Low RMR (resting metabolic rate) or declining RMR may indicate under‑fuelling or excessive training stress (Speakman and Selman, 2003).

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Carbohydrates

  • 3–5 g/kg/day for light activity

  • 8–12 g/kg/day for intense training blocks Carbohydrates support aerobic development, technical learning, and recovery (Burke, 2015; Reinhard and Galloway, 2022). Combat sport athletes often consume below recommended carbohydrate levels, impairing recovery and training quality (Barcelo, 2026).

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Protein

  • 1.2–2.4 g/kg/day to support muscle repair, strength development, and recovery (Bytomski, 2018)

  • Higher intakes may be beneficial during strength‑focused blocks or when recovering from accumulated muscle damage.

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Fat

  • ~1.0 g/kg/day, representing 20–35% of total daily intake Fats support hormonal health, immune function, and long‑term recovery (Potgieter, 2013).

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Body Mass and Composition Targets

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  • Maintain a walk‑around weight 12–15% above the target weight class; this range supports performance, reduces chronic restriction, and allows for safe weight descent during fight camp (Logue, 2018)

  • Assess body composition (fat‑free mass, body fat %, total body water) to establish a baseline

  • Review previous weight‑cut strategies to identify what worked and what caused unnecessary stress (Garthe, 2013)

  • Avoid rapid weight loss practices during off‑camp — they impair hydration, electrolyte balance, neuromuscular function, and long‑term health (Barley, 2018; Cheuvront and Kenefick, 2014)

  • Gradual weight management is strongly recommended, with reductions of ~0.5% body mass per week when needed (Hillier, 2019; Reale, 2024).

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Supplementation

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The off‑camp phase is the ideal time to:

  • evaluate which supplements are necessary

  • remove ineffective or unnecessary products

  • introduce evidence‑supported supplements for long‑term health and performance

Examples include:

  • creatine monohydrate

  • vitamin D (if deficient)

  • omega‑3 fatty acids

  • probiotics

  • multivitamin/mineral support (if needed)

(Cannataro, 2022; Kreider, 2017; Philpott, 2019).

This phase is also ideal for addressing deficiencies identified through bloodwork.

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Assessment and Screening

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Before entering fight camp, athletes should undergo:

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Body Composition Assessment

  • fat‑free mass

  • body fat percentage

  • total body water.

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Metabolic Assessment

  • resting metabolic rate (RMR)

  • energy expenditure patterns.

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Blood Screening

Blood tests can provide insight into:

  • micronutrient status

  • the high-sensitivity C-reactive protein (hs-CRP) test is a blood test that measures very low levels of CRP to detect chronic, low-grade inflammation, primarily assessing cardiovascular system

  • oxidative stress

  • red blood cell health

  • cortisol

  • creatine kinase

  • uric acid

  • readiness to train

(Battelli, 2016; Pedlar, 2019; Roth, 2019).

Elevated CK (creatine kinase enzyme), hs‑CRP, or uric acid may indicate accumulated fatigue, muscle damage, or metabolic stress — even when the athlete feels fine.

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Common Mistakes

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  • Staying in weight‑cut mode after a fight

  • Excessive restriction leading to low energy availability

  • Rebound overeating due to previous restriction

  • Neglecting aerobic development

  • Ignoring bloodwork or health markers

  • Losing too much structure in training or nutrition

  • Failing to maintain a healthy walk‑around weight

  • Using rapid weight‑loss methods during off‑camp

  • Poor sleep hygiene, leading to impaired recovery and mood.

These mistakes increase injury risk, impair hormonal health, reduce metabolic rate, and compromise long‑term performance capacity.

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Combat Sport Specific Adjustments

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  • Maintain a realistic, sustainable walk‑around weight (12–15% above class)

  • Build aerobic capacity early — it underpins repeatability later in camp

  • Prioritise strength development with adequate protein intake (1.2–2.4 g/kg/day)

  • Avoid early weight‑cutting behaviours; they reduce training quality and long‑term performance

  • Use blood screening and body composition data to identify deficiencies before camp begins

  • Establish consistent eating patterns to stabilise appetite and recovery rhythms

  • Treat this phase as the physiological and psychological foundation for the entire season

  • Address sleep quality and duration to restore cognitive and neuromuscular function (Watson, 2017)

  • Monitor mood, fatigue, and vigour — psychological fatigue often persists even when biochemical markers improve (Kara, 2025; Uddin, 2020).

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Practical Takeaways

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  • Restore health, energy availability, and hormonal balance after the previous camp

  • Fuel consistently with adequate carbohydrates, protein, and fats to support training and recovery

  • Maintain a sustainable walk‑around weight within 12–15% of the target class

  • Rebuild aerobic capacity and strength without unnecessary restriction

  • Use bloodwork, body composition, and previous camp data to personalise the next training cycle

  • Create stable daily routines around nutrition, hydration, and sleep to support long‑term performance

  • Prioritise gradual weight management, not rapid weight loss

  • Re‑establish healthy sleep patterns to support recovery and psychological wellbeing.

Early Preperatory Phase

Training Characteristics

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The Early Preparatory Phase marks the shift from general recovery to structured performance development. Training volume and intensity increase progressively, with a clear focus on:

  • building a robust aerobic base to support later high‑intensity work

  • increasing technical density and session quality

  • reintroducing structured strength and power blocks

  • improving repeatability in striking, wrestling, and scrambles

  • enhancing movement efficiency and conditioning tolerance.

This phase is where athletes begin accumulating meaningful training stress, so monitoring fatigue becomes essential. MMA athletes commonly show elevated CK, hs‑CRP, and uric acid during rising training loads, even before subjective fatigue appears (Tota, 2022; Battelli, 2016).

Sleep quality and consistency must be stabilised now to support neuromuscular recovery and cognitive sharpness (Charest & Grandner, 2020).

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Nutritional Priorities

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Nutrition now shifts from “restoration” to supporting progressive overload. Key priorities include:

  • fuelling higher training volume and intensity

  • increasing carbohydrate availability for key sessions

  • stabilising body mass before weight descent begins later

  • supporting strength and power development

  • maintaining full energy availability to optimise adaptation.

Combat sport athletes often under‑fuel during preparatory phases, especially carbohydrates, which limits training quality and increases fatigue (Barcelo, 2026).

This phase requires consistent fuelling, not restriction.

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Energy and Macronutrient Guidelines

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Energy Intake and Metabolism

  • Match energy intake to rising training demands

  • Maintain energy availability >30 kcal/kg FFM/day to support adaptation (Ihle & Loucks, 2004)

  • Monitor for early signs of under‑fuelling:

    • reduced training quality

    • increased tension/fatigue

    • declining vigour

    • poor sleep

    • elevated CK or hs‑CRP.

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Carbohydrates

  • 4–7 g/kg/day, scaled to session intensity

  • Increase pre‑session carbohydrate availability for:

    • high‑intensity striking

    • wrestling scrambles

    • conditioning intervals

  • Begin carbohydrate periodisation:

    • high‑carb for high‑intensity days

    • moderate‑carb for technical days

    • low‑carb only when strategically appropriate.

Carbohydrate periodisation improves training quality and metabolic flexibility (Burke, 2015).

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Protein

  • 1.4–2.2 g/kg/day

  • Higher intakes support strength progression and recovery from increased training density.

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Fat

  • 20–30% of total intake

  • Supports hormonal function and recovery during rising workloads.

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Body Mass and Composition Targets

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  • Maintain walk‑around weight within 10–14% of the target class

  • No aggressive weight cutting — it reduces training quality and increases injury risk

  • If weight needs adjusting, use gradual reductions (~0.5% per week) (Reale, 2024)

  • Track lean mass and hydration status to ensure adaptations are positive.

Rapid weight loss practices (sauna, dehydration, fasting) impair neuromuscular function and electrolyte balance and should not be used in this phase (Barley, 2018; Cheuvront and Kenefick, 2014).

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Supplementation

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Supplementation now supports performance progression, not just health:

  • creatine monohydrate for strength and power

  • omega‑3 fatty acids for inflammation control

  • vitamin D (if deficient)

  • probiotics for immune stability

  • caffeine for selected high‑intensity sessions

  • carbohydrate‑electrolyte solutions for double‑session days

(Kreider, 2017; Philpott, 2018).

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Assessment & Monitoring

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As training load increases, monitoring becomes essential for performance optimisation.

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Performance‑Relevant Biomarkers

  • Creatine Kinase (CK) — muscle damage

     An enzyme released when muscle fibres are stressed or damaged                      reflects intense striking, wrestling, or strength work

  • High sensitivity C-reactive protein (hs‑CRP) — inflammation load 

     A marker of systemic inflammation; elevated levels indicate accumulated         stress or insufficient recovery

  • Uric acid — metabolic stress

     A by‑product of high ATP turnover; elevated levels reflect metabolic strain       and often correlate with increased fatigue and reduced vigour

  • Cortisol — stress load

     A hormone that rises with physical and psychological stress; high levels           indicate fatigue, poor recovery, or excessive training load

  • Testosterone — anabolic readiness

     Supports muscle repair, strength, motivation, and recovery; low or                   declining levels suggest reduced adaptation capacity

  • Elevations in CK, hs‑CRP, or uric acid often appear before subjective fatigue (Ostapiuk-Karolczuk, 2025; Soler-Lopez, 2024).

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Body Composition

  • track lean mass and hydration

  • ensure weight stability before camp begins.

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Sleep

  • aim for >7 hours

  • stabilise sleep timing

  • monitor disturbances.

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Common Mistakes

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  • Increasing training load without increasing carbohydrate intake

  • Beginning weight cutting too early

  • Under‑fuelling high‑intensity sessions

  • Ignoring early signs of fatigue or mood disturbance

  • Overemphasising conditioning without supporting recovery

  • Allowing sleep quality to decline

  • Neglecting hydration during double‑session days.

These mistakes reduce training quality, impair adaptation, and increase injury risk.

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Combat Sport Specific Adjustments

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  • Increase carbohydrate availability for high‑intensity striking, wrestling, and conditioning

  • Build repeatability through structured technical volume and conditioning density

  • Prioritise strength progression with adequate protein intake

  • Maintain stable walk‑around weight to avoid unnecessary restriction later

  • Monitor metabolic stress markers (CK, hs‑CRP, uric acid) as training load rises

  • Track mood and readiness — psychological fatigue often precedes performance decline

  • Reinforce hydration and electrolyte strategies to support increased training density.

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Practical Takeaways

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  • Fuel to match rising training demands — especially carbohydrates

  • Build aerobic base, strength, and repeatability with structured progression

  • Maintain stable walk‑around weight without early restriction

  • Monitor fatigue using both biomarkers and subjective measures

  • Support recovery with sleep, hydration, and consistent nutrition

  • Use this phase to prepare the body for the demands of mid‑camp.

Fight Camp Phase

Training Characteristics

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The fight camp phase is highly structured, high‑intensity, and fight‑specific. Training focuses on:

  • high volumes of striking, wrestling, and grappling

  • repeated high‑intensity efforts and scrambles

  • sport‑specific conditioning (intervals, circuits, positional rounds)

  • maintaining strength and power

  • long‑run weight descent, not crash cutting

  • preparing the body for tapering and fight‑week strategies.

A key physiological goal is to reduce body fat while preserving lean mass, as lean tissue holds more water than fat and supports later acute water manipulation 24–48 hours before weigh‑in (Wang & Pierson, 1976).

Heat acclimation protocols can begin 4–5 weeks before fight week to support later water‑loss strategies.

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Nutritional Priorities

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Nutrition must support:

  • high‑intensity, high‑density training

  • controlled, gradual weight descent

  • muscle repair and immune function

  • hydration and electrolyte balance

  • preparation for tapering and fight‑week strategies.

Rapid weight loss and early dehydration impair neuromuscular function, increase cardiovascular strain, and reduce performance (Artioli, 2016; Barley, 2018; Cheuvront and Kenefick, 2014). Gradual, planned weight descent is strongly recommended (Hillier, 2019; Reale, 2024).

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Energy and Macronutrient Guidelines

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Energy Intake and Metabolism

  • Use a planned energy deficit to achieve 0.5–1.0 kg/week weight loss (Franchini, 2012)

  • Maintain sufficient energy availability to support training quality

  • Avoid chronic low energy availability to prevent RED‑S (Ihle and Loucks, 2004; Mountjoy, 2023)

  • Monitor for under‑fuelling:

    • reduced training quality

    • persistent fatigue

    • mood disturbances

    • poor sleep

    • elevated CK or hs‑CRP.

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Carbohydrates

  • Should not fall below 3–4 g/kg/day during fight camp (Januszko, 2021)

  • Increase intake on sparring, wrestling, and conditioning days

  • For sessions <6 hours apart, use rapid refuelling:

    • 0.6–1.0 g/kg within 30 minutes post‑exercise

    • followed by carbohydrate every 2 hours for 4–6 hours.

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Protein

  • 1.2–2.2 g/kg/day to support muscle repair and lean mass retention (Aragon, 2017)

  • Higher intakes may be beneficial during caloric deficit.

 

Fat

  • 0.7–1.3 g/kg/day, adjusted to meet caloric goals

  • Maintain enough fat to support hormonal function during weight descent.

 

Pre‑training meal

  • Consume the first meal 2–3 hours before the first training session (Kerksick, 2017).

 

 

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Body Mass and Composition Targets

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  • Use long‑run weight descent, not aggressive cuts

  • Aim for 0.5–1.0 kg/week loss through planned energy deficit (Franchini, 2012)

  • Preserve lean mass to support strength, power, and later water manipulation

  • Avoid early dehydration; save acute strategies for fight week

  • Track body mass weekly to ensure controlled descent.

Hydration guidance:

  • Combat athletes should consume sodium‑ and potassium‑containing drinks to avoid electrolyte imbalance (Januszko and Lange, 2021)

  • For rehydration after training or controlled water loss, drink 1.5 L of fluid per kg of body mass lost (McCartney, 2017)

Heat acclimation options:

  • sauna 3–4×/week for 15–25 minutes

  • hot‑water immersion 2–3×/week for ~20 minutes.

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Supplementation

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Supplementation during fight camp should support:

  • recovery and inflammation control

  • strength and power

  • hydration and performance

  • immune stability

Examples include:

  • creatine monohydrate

  • omega‑3 fatty acids

  • vitamin D (if deficient)

  • probiotics

  • curcumin

  • carbohydrate‑electrolyte solutions

  • caffeine for selected high‑intensity sessions.

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Assessment & Monitoring

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Performance‑Relevant Biomarkers

  • CK — muscle damage

  • hs‑CRP — inflammation load

  • Uric acid — metabolic stress

  • Cortisol — stress load

  • Testosterone — anabolic readiness

Elevations in CK, hs‑CRP, or uric acid often appear before subjective fatigue.

 

Subjective Monitoring

  • mood

  • tension

  • fatigue

  • vigour.

Mood disturbances often increase during fight camp due to rising training load and weight descent.

 

Body Composition

  • track lean mass, fat mass, and hydration

  • ensure weight descent is controlled and performance‑friendly.

 

Sleep

  • aim for >7 hours

  • stabilise sleep timing

  • monitor disturbances.

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Tapering (1–2 Weeks Before Fight Week)

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The taper period begins 1–2 weeks before fight week, forming the final stage of fight camp:

  • Reduce total training load by ~40%, while maintaining high‑intensity, fight‑specific drills to preserve neuromuscular adaptations and technical sharpness (Coutts, 2007)

  • Tapering supports heat acclimation and assists weight management (McCartney, 2017)

  • Typically involves a reduction in carbohydrate and fluid intake alongside reduced training load, promoting glycogen depletion and further weight loss (Hultman, 1967)

  • Protein intake must remain high to protect muscle mass; fat intake can be adjusted to meet caloric goals (Seo, 2018)

  • Sweat rates depend on genetics, body size, climate, humidity, and heat acclimatisation — monitor closely

  • Track the athlete’s rate of weight descent to avoid excessive or unsafe loss.

This taper bridges directly into Fight Week, where acute strategies will be applied.

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Injured Athletes’ Nutrition

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Combat sports carry a high injury risk due to minimal protective equipment.

Common injuries include:

  • skeletal muscle, bone, tendon, ligament

  • head, wrist/hand, knees, shoulders

  • lacerations, fractures, concussions (Kreher & Schwartz, 2012).

 

Nutrition for injury recovery

  • Protein: increase to 1.3–2.5 g/kg/day to support tissue repair (Patkova, 2017; Turnagol, 2021).

  • Include micronutrients and supplements that support healing:

    • vitamin D, vitamin C, zinc

    • creatine monohydrate

    • fish oil

    • curcumin

    • probiotics

    • amino acids (Maughan, 2018).

 

Traumatic Brain Injury (TBI) considerations

  • TBIs are common in combat sports (Lockwood, 2017)

  • Energy needs may increase to 100–200% of baseline RMR (Lee & Oh, 2022)

  • ~2 g/kg/day protein supports recovery (Quintard, 2019)

  • Creatine may reduce inflammation and protect brain tissue (Dean, 2017; Dolan, 2019)

  • Vitamins B, C, E and omega‑3 fatty acids reduce oxidative damage (McGeown, 2021; Scrimgeour & Condlin, 2014).

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Practical Takeaways

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  • Fuel high‑intensity training with adequate carbohydrates

  • Maintain strength, power, and repeatability throughout camp

  • Use gradual weight descent — avoid early dehydration

  • Monitor biomarkers and mood to manage fatigue

  • Support recovery with sleep, hydration, and consistent nutrition

  • Begin tapering 1–2 weeks before fight week to sharpen performance

  • Prepare the body for the demands of fight week and acute weight‑cut strategies.

Fight Week Phase

Training Characteristics

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Fight Week focuses on minimising fatigue, maintaining sharpness, and supporting acute weight‑management physiology. Training volume is significantly reduced, while intensity remains high enough to preserve neuromuscular readiness.

Key characteristics:

  • continuation of tapering with ~40% reduced training load

  • short, high‑intensity, fight‑specific drills

  • no high‑volume conditioning or sparring

  • controlled movement sessions for timing and mobility

  • alignment with acute weight‑loss physiology

The goal is to arrive at weigh‑in safely, with reduced gut content, reduced glycogen‑bound water, and controlled extracellular water, without compromising performance.

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Nutritional Priorities

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Nutrition during Fight Week must support:

  • controlled acute weight reduction

  • maintenance of strength, power, and cognitive sharpness

  • protection of hydration and electrolyte balance

  • preparation for rapid post‑weigh‑in recovery

  • minimising gastrointestinal mass

  • safe management of carbohydrate and sodium intake

Rapid weight loss practices should be discouraged unless supervised by qualified professionals (Artioli, 2016).

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Energy and Macronutrient Guidelines

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Carbohydrates

  • Glycogen depletion depends on low‑carbohydrate intake (< 50 g/day) after assessing the athlete’s normal intake (Reale, 2018a)

  • Glycogen depletion can begin 7 days before weigh‑in, with 72 hours being adequate

  • Glycogen depletion may reduce 1–2% of body weight

  • Carbohydrate restriction should be limited and used only when necessary.

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Protein

  • Maintain 1.6–2.2 g/kg/day to protect lean mass during reduced carbohydrate intake.

 

Fat

  • Adjust fat intake to meet caloric goals while carbohydrates are reduced.

 

Low‑Residue (Low‑Fibre) Diet

  • Low‑fibre intake (< 10 g/day vs recommended > 30 g/day) for 4 days may reduce 1–2% of body weight (de Vries, 2016; Foo, 2022)

  • Reduces gut content and digestive mass.

 

Sodium Manipulation (Physiology Only)

  • Sodium restriction should be based on the athlete’s normal intake.

  • Low‑sodium diet (< 2.3 g/day) may trigger water loss (Bankir, 2017; Veniamakis, 2022).

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Body Mass and Composition Targets

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Fight Week focuses on acute, short‑term reductions in:

  • gut content

  • glycogen stores

  • extracellular water

  • total body water.

NOT fat loss — that should already be completed during fight camp.

Rapid weight loss strategies include fluid restriction, acute dehydration, sauna, hot‑water immersion, salt baths, fasting, skipping meals, and reduction of carbohydrates and fibre digestion (Connor and Egan, 2019; Di Pietro, 2020).

Training intensity during depletion should be 40–50% of maximum heart rate, for 30–45 minutes, supporting rapid weight loss (Murray and Rosenbloom, 2018).

Extended low energy availability can impair hormonal balance, kidney function, immune resilience, bone health, and psychological wellbeing (Cupka and Sedliak, 2023; Kim and Park, 2021; Lakicevic, 2021).

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Supplementation

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Fight Week supplementation supports:

  • hydration

  • electrolyte balance

  • inflammation control

  • cognitive sharpness

  • recovery after weigh‑in

Useful options include:

  • electrolytes (sodium, potassium)

  • omega‑3 fatty acids

  • vitamin D (if deficient)

  • probiotics

  • carbohydrate‑electrolyte solutions.

No new supplements should be introduced during Fight Week.

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Assessment and Monitoring

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Performance‑Relevant Biomarkers

  • CK — muscle damage

  • hs‑CRP — inflammation load

  • Uric acid — metabolic stress

  • Cortisol — stress load

  • Testosterone — anabolic readiness

 

Subjective Monitoring

  • mood

  • tension

  • fatigue

  • vigour

 

Body Composition

  • monitor hydration status

  • track acute weight changes

  • ensure reductions are controlled and safe

 

Sleep

  • protect sleep duration and quality

  • avoid late‑night training

  • stabilise circadian rhythm.

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Fight‑Week‑Specific Adjustments

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Glycogen Depletion

  • Reduces bound water and scale weight.

  • Reversed immediately after weigh‑in.

 

Low‑Residue Diet

  • Reduces gut content and digestive mass.

 

Sodium Reduction

  • Influences extracellular fluid and water retention.

 

Heat Exposure

  • Sauna and hot‑water immersion support sweat rate and thermoregulation.

 

Taper Completion

  • ~40% reduced training load

  • maintain high‑intensity, short‑duration drills

  • minimise inflammation and fatigue.

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Practical Takeaways

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  • Fight Week is about acute, controlled physiological adjustments, not fat loss

  • Glycogen depletion, low‑residue diet, and sodium reduction can reduce scale weight safely when supervised

  • Training volume decreases; intensity stays sharp

  • Protect hydration, electrolytes, and cognitive function

  • Monitor biomarkers and mood to avoid excessive fatigue

  • Avoid extreme dehydration or unsupervised rapid weight‑cutting practices

  • Prepare for structured rehydration and refuelling after weigh‑in.

Fight Day Phase

Training Characteristics

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Fight Day focuses on:

  • maintaining calmness and readiness

  • preserving neuromuscular sharpness

  • avoiding fatigue

  • supporting digestion and hydration

  • ensuring stable blood glucose.

Movement is light, controlled, and purposeful. No high‑intensity training is performed.

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Nutritional Priorities

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Fight Day nutrition must:

  • restore glycogen

  • stabilise blood glucose

  • support hydration

  • avoid gastrointestinal distress

  • maintain cognitive clarity

All foods should be familiar and easy to digest.

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Energy and Macronutrient Guidelines

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Carbohydrates

  • 1–4 g/kg/day (Kerksick, 2017)

  • Prioritise high‑GI, easy‑digestion carbohydrates:

    • starchy potatoes, sweet potatoes

    • rice and flour‑based foods (pancakes, pasta, rice crackers, bagels, sourdough)

    • sports drinks (6–8% carbohydrate)

    • low‑volume carbohydrate snacks (dates, applesauce, pretzels, bars).

 

Protein

  • Spread intake across 20–30 g boluses to support muscle repair.

 

Fat

  • Keep fat low to avoid delayed gastric emptying.

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Meal Timing and Distribution

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6‑Hour Window

  • 210–280 g carbohydrates

  • 50–70 g protein

  • in 20–30 g protein boluses (Kerksick, 2017; Mata, 2019).

 

12‑Hour Window

  • 420–560 g carbohydrates

  • 100–140 g protein

  • in 20–30 g boluses.

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Rehydration

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Acute Rehydration (1–2 hours post weigh‑in)

  • 1–1.5 L/hour (Reale, 2018b).

 

Non‑Acute Rehydration (3–6 hours post weigh‑in)

  • electrolyte fluids containing sodium, potassium, and chloride.

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Glycogen Restoration

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  • Begins > 6 hours post weigh‑in

  • Focus on high carbohydrate intake

  • Low‑to‑moderate protein

  • Minimal fat

  • Small, frequent meals.

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Gastrointestinal Comfort

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Avoid foods that may trigger GI distress:

  • coffee

  • citrus fruits and juices

  • tomatoes and tomato‑based sauces

  • carbonated beverages

  • peppermint

  • garlic, onion

  • chocolate

  • fatty, spicy, or fried foods (Amerikanou, 2023).

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Practical Takeaways

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  • Fight Day is about restoring energy and hydration, not experimentation

  • Use high‑GI, easy‑digestion carbohydrates to replenish glycogen

  • Spread protein intake across small, frequent meals

  • Rehydrate gradually with electrolytes to restore plasma volume

  • Avoid GI‑triggering foods to maintain comfort and readiness

  • Keep all foods familiar — no new foods on Fight Day

  • Maintain calm, controlled pacing throughout the day.

Post-Fight Recovery Phase

Training Characteristics

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The Post‑Fight Recovery Phase focuses on restoring physical, metabolic, and psychological balance after competition. The fight itself — combined with the preceding weight cut, rehydration, and emotional stress — places significant strain on the body.

Key characteristics:

  • immediate reduction in training load

  • emphasis on rest, mobility, and low‑intensity movement

  • gradual reintroduction of aerobic work

  • no high‑intensity or high‑impact training

  • prioritisation of injury assessment and tissue repair

  • psychological decompression and sleep restoration.

The goal is to return the athlete to a healthy baseline before beginning the next training cycle.

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Nutritional Priorities

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Post‑fight nutrition must support:

  • rehydration and electrolyte restoration

  • replenishment of glycogen stores

  • muscle repair and inflammation control

  • immune system recovery

  • psychological wellbeing

  • healing from any injuries sustained during the fight.

Carbohydrate and protein intake, hydration, and nutrient timing are key components of restoring homeostasis and performance (Naderi, 2025; Wang, 2024).

This phase reverses the restrictions of Fight Week and Fight Day, returning the athlete to balanced, adequate energy intake.

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Energy and Macronutrient Guidelines

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Energy Intake

  • Increase energy intake to restore normal physiological function

  • Avoid prolonged low energy availability, which increases risk of RED‑S, hormonal disruption, and immune suppression (Cupka and Sedliak, 2023; Kim and Park, 2021).

 

Carbohydrates

  • Restore glycogen with moderate to high carbohydrate intake

  • Prioritise whole grains, fruits, starchy vegetables, and easy‑digestion options in the first 24–48 hours

  • Carbohydrate intake is essential for glycogen resynthesis and recovery (Naderi, 2025; Wang, 2024).

 

Protein

  • Maintain 1.6–2.2 g/kg/day to support muscle repair

  • Higher intakes may be beneficial if muscle damage is significant

  • Protein supports muscle protein synthesis and recovery (Naderi, 2025).

 

Fat

  • Reintroduce healthy fats to support hormonal recovery and reduce inflammation

  • Include omega‑3 sources (fish, flax, walnuts) to support tissue repair and inflammatory control (Wang, 2024).

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Body Mass and Composition

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  • Expect natural increases in body mass due to rehydration, glycogen restoration, and normal food intake

  • Avoid restrictive behaviours or attempts to maintain fight weight

  • Focus on returning to a healthy, sustainable walk‑around weight

  • Monitor hydration status and ensure full recovery from any acute weight‑cut effects.

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Supplementation

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Post‑fight supplementation supports recovery, inflammation control, and tissue repair.

Useful options include:

  • omega‑3 fatty acids (inflammation control)

  • creatine (muscle recovery and cognitive support)

  • vitamin D (if deficient)

  • probiotics (gut and immune health)

  • curcumin (anti‑inflammatory)

  • electrolytes (rehydration).

These nutrients support muscle repair, immune function, and inflammation management (Naderi, 2025; Wang, 2024).

Injury‑specific supplements may be used as needed:

  • vitamin C, zinc (tissue repair)

  • amino acids (muscle recovery).

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Assessment & Monitoring

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Performance‑Relevant Biomarkers

Post‑fight elevations in:

  • CK (muscle damage)

  • hs‑CRP (inflammation)

  • uric acid (metabolic stress)

  • cortisol (stress load)

are common and may take several days to normalise (Andreato, 2015; Lee, 2017; Naderi, 2025).

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Subjective Monitoring

  • mood

  • tension

  • fatigue

  • vigour

  • sleep quality.

Psychological fatigue and emotional decompression are normal after competition.

 

Injury Screening

  • assess for soft‑tissue damage

  • evaluate joint integrity

  • screen for concussion or head trauma

  • monitor swelling, bruising, and pain.

 

Sleep

  • prioritise 8+ hours

  • stabilise sleep timing

  • use naps if needed to support recovery.

Sleep is a critical component of immune and psychological recovery (Hiranandani Hospital, 2025).

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Phase‑Specific Adjustments

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Rehydration

  • Continue structured rehydration with electrolytes

  • Replace fluids gradually to avoid gastrointestinal discomfort.

 

Glycogen Restoration

  • Increase carbohydrate intake for 24–48 hours

  • Use small, frequent meals to support digestion and glycogen resynthesis (Naderi, 2025).

 

Inflammation Management

  • prioritise omega‑3s, antioxidants, and adequate sleep

  • avoid excessive NSAID use unless medically advised

  • nutritional strategies can modulate inflammation and oxidative stress (Wang, 2024)

 

Psychological Recovery

  • allow decompression time

  • reduce cognitive load

  • avoid immediate return to high‑stress training environments

  • psychological recovery is a recognised component of post‑exercise restoration (Hiranandani Hospital, 2025).

 

Return to Training

  • begin with low‑intensity aerobic work

  • reintroduce strength training gradually

  • avoid sparring until fully recovered

  • follow medical guidance for injuries.

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Practical Takeaways

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  • Post‑fight recovery restores hydration, glycogen, and hormonal balance

  • Increase energy intake to reverse Fight Week restrictions

  • Prioritise sleep, electrolytes, and nutrient‑dense foods

  • Monitor biomarkers and mood to track recovery

  • Address injuries early and follow medical guidance

  • Avoid rushing back into high‑intensity training

  • Use this phase to reset physically and mentally before the next cycle.

A complete nutrition guide across training phases

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