Ramadan Fasting Slowed Post-Match Muscle Recovery in Elite Soccer Players: What the Research Shows

Ramadan Fasting Slowed Post-Match Muscle Recovery in Elite Soccer Players: What the Research Shows

Medical disclaimer: This article summarises published research for informational purposes only. It is not medical advice and is not a substitute for guidance from a qualified health professional. Always consult your doctor before starting any fasting protocol, especially if you have an existing health condition or take medication.

Study at a Glance

What This Study Looked At

Researchers wanted to know whether fasting during Ramadan changes how quickly elite athletes recover from a hard match, using elite soccer players as the test case. Ramadan fasting differs from typical time-restricted eating in an important way: athletes still train and compete during daylight hours, meaning they perform demanding exercise while fasted and then have a narrow overnight window to rehydrate and refuel. The study measured muscle damage markers, jump performance, sprint speed, and subjective soreness after a simulated match, comparing recovery one week before Ramadan against recovery during the fourth week of Ramadan — a question directly relevant to anyone combining intermittent fasting and exercise.

Who Was Studied

Participant profile: 8 elite/professional male soccer players, average age around 21 years, all experienced with Ramadan fasting as part of their normal training and competition calendar.

How Ramadan fasting worked in this study: Players abstained from all food and fluids from dawn until sunset each day, as is standard during Ramadan, while continuing their usual training and testing schedule. The simulated match test and all recovery measurements (0, 24, 48, and 72 hours after) were taken during the fasting period itself.

What the Researchers Found

Muscle Damage (Creatine Kinase)

Key findings:

• Creatine kinase, a blood marker of muscle damage, rose significantly at 24 and 48 hours after the simulated match on both testing occasions — but the rise was more pronounced during Ramadan.
• Uric acid, another marker tracked alongside creatine kinase, followed a similar pattern of greater elevation during the fasting period.

Physical Performance Recovery

• Squat jump and countermovement jump performance dropped after the match on both occasions, with larger decreases and slower return to baseline (out to 48–72 hours) during Ramadan.
• Maximal voluntary contraction (a measure of muscle strength) fell at 0, 24, 48, and 72 hours post-match on both occasions, again with a more pronounced dip during Ramadan.
• 20-meter sprint times were slower immediately after the match and at 48 hours, on both testing occasions.

Subjective Recovery

• Muscle soreness increased throughout the 72-hour recovery window on both occasions, but reached a higher peak during Ramadan.
• Fatigue ratings rose at 24 hours before Ramadan, and stayed elevated through 48 hours during Ramadan — indicating a longer subjective recovery tail while fasting.

What Did Not Change

• The overall pattern of recovery — muscle damage markers rising and performance dipping, then both gradually normalizing over 24–72 hours — was consistent whether or not players were fasting. Ramadan fasting amplified the size and duration of the response rather than creating a fundamentally different recovery pattern.

What the Researchers Concluded

The authors concluded that Ramadan fasting did not create a qualitatively different or dangerous recovery pattern after a simulated match, but it did extend how long it took performance and muscle damage markers to return to baseline — meaning athletes training and competing during Ramadan may need a longer recovery window than usual between demanding sessions.

What This Means If You Fast

• Training fasted is not the same as training fed, especially for recovery. If you exercise intensely during a fasting window, expect your muscles to need more time to bounce back than they would on a normal eating schedule — plan harder sessions accordingly.
• Give yourself an extra day. This study suggests recovery from a hard fasted training session may stretch closer to 72 hours rather than the 24–48 hours typical in a fed state. Athletes and serious exercisers combining strength training with fasting should factor this into their weekly schedule.
• Rehydration and refeeding after the fast matter more, not less, when training hard. With a narrower window to replace fluid and nutrients, what you eat and drink once the fast ends becomes a bigger lever for recovery than it would be with unrestricted eating.
• This doesn't mean fasted training is unsafe. None of the changes observed were described as dangerous — muscle damage markers and performance both returned to baseline within the tracked window on both occasions. The difference was speed of recovery, not whether recovery happened.
• Casual exercisers likely see a smaller effect than elite athletes doing match-intensity work. The intensity of a simulated competitive match is far higher than a typical gym session, so moderate exercisers combining fasting and exercise should not assume the same magnitude of slowed recovery.
• Soreness and fatigue are useful signals during fasted training blocks. If soreness or fatigue is lingering longer than usual, it may be a sign to extend rest rather than push through on the same schedule you'd use in a fed state.

Study Limitations

• Very small sample size (n=8) — a pilot study of this size cannot be generalized broadly and needs replication in a larger cohort
• No separate control group — each athlete served as their own comparison, which controls for individual variation but cannot rule out other factors that differ between the two testing periods (season timing, cumulative training load, sleep changes during Ramadan)
• All-male, elite athlete sample — findings may not apply to recreational exercisers, women, or non-athletes
• Short-term design — the study captured recovery from a single simulated match on two occasions, not long-term adaptation across a full Ramadan month of training
• Some source material for this summary (institutional details, precise statistical values) could not be independently verified at generation time due to publisher and database access restrictions — directional findings reflect the best available abstract-level information

Source

Bouzid MA, Abaïdia AE, Bouchiba M, Ghattassi K, Daab W, Engel FA, Chtourou H. (2019). Effects of Ramadan Fasting on Recovery Following a Simulated Soccer Match in Professional Soccer Players: A Pilot Study. Frontiers in Physiology. PMID: 31866876

Frequently Asked Questions

Does Ramadan fasting slow down muscle recovery after exercise?

This pilot study of 8 elite soccer players found that recovery after a simulated match was slower during Ramadan than before it — creatine kinase (a muscle damage marker) rose more, and jump, strength, and sprint performance took longer to return to baseline, extending out toward 72 hours instead of 24–48 hours.

Is it dangerous to train hard while fasting during Ramadan?

The study did not find fasting made recovery dangerous — muscle damage markers and performance both returned to normal within the tracked recovery window on both occasions. The main difference was that recovery took longer during the fasting period, not that it failed to happen.

What is creatine kinase and why does it matter for fasting research?

Creatine kinase is an enzyme released into the blood when muscle fibers are damaged, commonly used as a marker of exercise-induced muscle damage. Higher and more prolonged elevations, as seen during Ramadan in this study, indicate greater muscle stress and a longer repair process.

Should athletes change their training schedule during Ramadan?

Based on this study's findings, athletes training intensely during Ramadan may benefit from extra recovery time between hard sessions rather than following the same 24–48 hour turnaround they'd use outside of the fasting period.

Does this apply to regular gym-goers, not just elite athletes?

Not necessarily to the same degree. This study used a simulated competitive match — a very high-intensity stimulus. Recreational exercisers doing moderate workouts while fasting are unlikely to see the same magnitude of slowed recovery, though allowing extra rest is still a reasonable precaution.

Related Research and Articles

• Can you exercise while intermittent fasting?
• Strength training while fasting: what you need to know
• Intermittent fasting and athletic performance
• Exercise during fasting: best practices
• Does intermittent fasting destroy muscle?
• Ramadan fasting vs. intermittent fasting: what's the difference?
• Best time to exercise during intermittent fasting

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