Creatine for Runners: Sprints, Intervals and Distance

Creatine's measured effect is in short, repeated bursts. Across 14 double-blind trials of repeated sprints, mean power rose and body mass rose by 0.79 kg.¹ In the distance trials, time to exhaustion and time-trial times did not differ from placebo,^{2, 3} so the extra water weight is the trade-off a distance runner weighs against a stronger finish.

Evidence at a glance

• Repeated sprints: mean power up (standardised mean difference 0.61) across 14 trials; peak power and fatigue unchanged; body mass +0.79 kg.¹
• Distance: time to exhaustion in the heat 47.0 minutes before and 49.7 after, P = 0.095;² 120 km cycling time trial, overall time unchanged, more power in the final 4 km sprint.³
• Dose: the authorised wording applies at 3 g a day for adults doing high-intensity exercise;⁴ a single 10 g serving doubled diarrhoea against 5 g twice a day.⁵
• Sport rules: creatine belongs to none of the groups UK Anti-Doping gives as examples of the Prohibited List; a tested athlete checks the product, because "no guarantee can be given that any particular supplement is free from prohibited substances".^{6, 7}
• Not tested: recreational runners at 3 g a day over a season; marathon, half-marathon or 10 km times.

Sources checked on 11 November 2026.

Does creatine help runners?

It depends on which part of running you mean. The best-tested effect is on repeated sprints. A 2022 systematic review pooled 14 double-blind randomised trials in which adults took about 20 g a day for 3 to 7 days and then performed 4 to 20 sprints of up to 10 seconds with rests of no more than 90 seconds: mean power across the sprints rose on creatine (standardised mean difference 0.61), while peak power, the drop-off across the set and blood lactate did not differ from placebo, and body mass was 0.79 kg higher.¹

At 3 g (grams) a day the authorised wording for the ingredient is that creatine increases physical performance in successive bursts of short-term, high intensity exercise, for adults doing high-intensity exercise.⁴ Nothing else about creatine and running is an authorised claim; the rest of this page is what individual trials found.

For steady distance work the record is thinner and mixed. A 2003 meta-analysis of 100 placebo-controlled studies found small effect sizes whatever the task length (0.24 for efforts under 30 seconds, 0.19 for 30 to 150 seconds, 0.20 for longer than 150 seconds) and a smaller effect for field tasks such as running and swimming (0.14) than for laboratory tasks (0.25); its author concluded that creatine "does not appear to be effective in improving running and swimming performance".⁸ In the eight distance trials below, finishing time or time to exhaustion did not differ from placebo in seven.

What does creatine do in a runner's muscle?

Muscle holds creatine as phosphocreatine, the store that powers the first seconds of a hard effort before breathing and heart rate catch up. In 31 men, six days of 20 g a day raised muscle total creatine by about 20%, and 3 g a day reached the same rise more gradually over 28 days.⁹ What creatine does across the body is the hub page; here the point is where a runner draws on that store.

A 1 km cycling time trial shows the shift. In 19 amateur cyclists, five days of 20 g a day slowed the rise in oxygen uptake at the start, cut the total oxygen used from 4.64 to 4.47 litres and raised the oxygen deficit from 0.82 to 0.98 litres, so more of the work came from the anaerobic store; the time, 89.1 seconds before and after, did not change.¹⁰ A steady 10 km at conversational pace draws little on that store; hill repeats, 400 m intervals, a surge to cover a move and the sprint for the line draw on it several times over, with short recoveries.

What did the trials of distance running and cycling find?

Eight placebo-controlled trials measured a distance outcome.

The pattern matches the sprint evidence. In the two rides that ended with sprints, the sprints got stronger while the ride itself did not;^{3, 11} the one trial in which a steady measure rose was the rowers' lactate threshold, in 16 people over a week.¹² One trial of eight found a distance measure that rose against placebo, and none found a slower finishing time. No marathon, half-marathon, 10 km or parkrun time has been a trial outcome (literature searched to 11 November 2026).

Will creatine make you heavier on the run?

Yes, by a little under a kilogram at loading doses, and it is water inside muscle. The sprint meta-analysis put the rise at 0.79 kg after 3 to 7 days of about 20 g a day,¹ and 12 men on 21.6 g a day for a week gained 0.88 kg.¹⁶ In 32 trained men and women, 28 days of creatine raised muscle creatine, body mass and total body water, while the split between water inside and outside cells did not change,¹⁷ so the extra water follows the body's usual proportions rather than pooling under the skin. Does creatine make you gain weight has the full account.

For a distance runner the question is whether the weight costs more than the sprint gives, and two trials answer it in part. In the 120 km time trial, body mass rose 1.54% on creatine against 0.99% on placebo, the overall time was unchanged and the final 4 km sprint was stronger.³ In highly trained rugby players, five days of 20 g a day produced no significant change in body mass or in speed over 10 x 40 m running sprints.¹⁸ At 3 g a day without loading, the muscle store fills over about a month,⁹ so the water arrives gradually rather than in race week.

Do footballers, rugby players and cyclists take creatine?

Yes, and team sport is where the trial record is longest, because a match is repeated sprints with short recoveries. In 98 American college footballers followed for 21 months, with 24-hour urine collected at nine points, creatine users and non-users did not differ on 54 quantitative blood and urine markers or 15 qualitative urine tests.¹⁹

In 59 top-level footballers taking creatine for 28 days, 5 g twice a day caused no more stomach complaints than placebo, while a single 10 g dose doubled the rate of diarrhoea (55.6% against 28.6%).⁵ In 30 female footballers doing six weeks of in-season plyometric training, the group on creatine improved more in jumps and repeated sprints than the placebo group.²¹ For cyclists the case is the finish: the two rides above found more sprint power after two and a half hours and after 120 km.^{3, 11}

Is creatine allowed in sport?

Creatine is not named in UK Anti-Doping's summary of the Prohibited List. The List, which the World Anti-Doping Agency manages and UK Anti-Doping applies, gives as its examples of what is banned at all times anabolic agents, peptide hormones, and diuretics and masking agents, and of what is banned in competition cannabinoids, glucocorticoids, narcotics and stimulants; creatine belongs to none of those groups, and the same page says the List is not limited to the substances it names, so an athlete who is tested checks the current List itself.⁶ The same page says an athlete is "strictly liable" for anything found in their system, "regardless of how it got there or whether there was any intention to cheat".⁶

That is why a tested athlete checks the product rather than the ingredient. UK Anti-Doping's supplements hub says that "no guarantee can be given that any particular supplement is free from prohibited substances" and that athletes "must therefore assess the need, risk and consequences to their careers" before taking any supplement.⁷ In practice that means a single-ingredient creatine with nothing else on the label and, for anyone who can be tested, a product that states batch testing for banned substances. Which form to choose is on types of creatine compared; there is no form of creatine made for runners, and every trial above that names its form used monohydrate.

How much creatine should a runner take, and when?

3 g (grams) to 5 g a day, every day, with no loading phase. The authorised wording applies at 3 g a day,⁴ 3 g a day filled the muscle store over about a month in the loading study,⁹ and 5 g twice a day was no different from placebo for stomach complaints in the 28-day footballers' trial while a single 10 g serving doubled diarrhoea,⁵ so no single serving above 5 g. Drink as you normally would; the NHS guide is 6 to 8 cups or glasses of fluid a day, more in heat or during long sessions.²² Any time of day works, before or after a run or with a meal: when to take creatine and how much creatine should you take cover the detail.

Does creatine dehydrate you goes through the fluid question, salt and fluid for long runs are on electrolytes for runners, and a raised creatinine on a blood test is explained on creatine vs creatinine.

What we don't know

No trial has given recreational runners 3 g a day across a season and timed their races; every distance trial above loaded 20 to 25 g a day for a week or less, or gave a maintenance dose for at most six weeks. The eight distance trials together hold 140 people: three enrolled only men, three do not report sex in their summaries, and 25 women appear across the other two, the all-female trial lasting four weeks.¹⁵ Whether the lower heart rate and temperature seen at 30.3 C change anything on a hot race day, and whether the extra water weight matters on hills or over 26.2 miles, were not measured. Cramp has been counted only in footballers who chose their own group.²⁰

Frequently asked questions

Is creatine good for runners?

For the parts of running that are short and repeated, yes in the trials: mean power across repeated sprints rose in 14 double-blind trials.¹ For steady distance, finishing time or time to exhaustion did not differ from placebo in seven of eight trials.^{2, 3}

Will creatine help with running?

It depends on the session. Intervals, hill repeats and a finishing sprint draw on the phosphocreatine store that creatine fills;⁹ a steady run does not, and in the 1 km time trial the finishing time did not change on creatine, 89.1 seconds before and after, or on placebo.¹⁰

Do footballers take creatine?

Yes. 98 American college footballers were followed on it for 21 months with no change in 54 blood and urine markers,¹⁹ and 59 top-level footballers took it for 28 days.⁵

Should runners take creatine before a race?

The store fills over six days at 20 g a day or about a month at 3 g a day,⁹ so what matters is the weeks before; no trial has tested a single serving on race morning, and the loading study measured the store filling over days, not hours. Starting in race week brings the 0.79 kg of water in race week;¹ start in a training block instead.

Does creatine affect endurance?

In seven of the eight distance trials the measure did not differ from placebo; the rowers' lactate threshold rose from 314 to 336 W in 16 people over a week.¹² The measured effect of creatine is in short, repeated bursts.¹

Sources

1. Glaister M, Rhodes L. Short-term creatine supplementation and repeated sprint ability. International Journal of Sport Nutrition and Exercise Metabolism, 2022. Systematic review and meta-analysis, 14 double-blind randomised trials, adults 18 to 60; funding not stated on PubMed. PubMed 36041731.
2. Kilduff LP, et al. The effects of creatine supplementation on cardiovascular, metabolic, and thermoregulatory responses during exercise in the heat in endurance-trained humans. International Journal of Sport Nutrition and Exercise Metabolism, 2004. Randomised placebo-controlled trial, 21 men, 7 days; funding not stated on PubMed; an erratum was published in 2017 (PubMed 28301303). PubMed 15467102.
3. Tomcik KA, et al. Effects of creatine and carbohydrate loading on cycling time trial performance. Medicine and Science in Sports and Exercise, 2018. Randomised placebo-controlled trial, 18 men, 14 days; funding not stated on PubMed. PubMed 28806275.
4. Department of Health and Social Care. Great Britain nutrition and health claims (NHC) register, entry 67 (creatine). Last updated 19 May 2026. Fetched 11 November 2026. gov.uk.
5. Ostojic SM, Ahmetovic Z. Gastrointestinal distress after creatine supplementation in athletes: are side effects dose dependent? Research in Sports Medicine, 2008. Double-blind randomised trial, 59 men, 28 days; funding not stated on PubMed. PubMed 18373286.
6. UK Anti-Doping. What's banned in sport: the Prohibited List. No page date shown. Fetched 11 November 2026. ukad.org.uk.
7. UK Anti-Doping. Supplements Hub: the risks of taking supplements. No page date shown. Fetched 11 November 2026. ukad.org.uk.
8. Branch JD. Effect of creatine supplementation on body composition and performance: a meta-analysis. International Journal of Sport Nutrition and Exercise Metabolism, 2003. Meta-analysis, 100 placebo-controlled studies; funding not stated on PubMed. PubMed 12945830.
9. Hultman E, et al. Muscle creatine loading in men. Journal of Applied Physiology, 1996. Supplementation study, 31 men; funding not stated on PubMed. PubMed 8828669.
10. De Andrade Nemezio KM, et al. Effect of creatine loading on oxygen uptake during a 1-km cycling time trial. Medicine and Science in Sports and Exercise, 2015. Double-blind randomised placebo-controlled trial, 19 amateur cyclists, 5 days; non-US government research support listed on PubMed. PubMed 26083771.
11. Vandebuerie F, et al. Effect of creatine loading on endurance capacity and sprint power in cyclists. International Journal of Sports Medicine, 1998. Double-blind randomised crossover, 12 elite cyclists, 5 days; non-US government research support listed on PubMed. PubMed 9839847.
12. Chwalbińska-Moneta J. Effect of creatine supplementation on aerobic performance and anaerobic capacity in elite rowers in the course of endurance training. International Journal of Sport Nutrition and Exercise Metabolism, 2003. Randomised placebo-controlled trial, 16 men, 5 days; funding not stated on PubMed. PubMed 12945828.
13. Syrotuik DG, et al. Effects of creatine monohydrate supplementation during combined strength and high intensity rowing training on performance. Canadian Journal of Applied Physiology, 2001. Randomised placebo-controlled trial, 22 rowers, 6 weeks; non-US government research support listed on PubMed. PubMed 11842271.
14. Biwer CJ, et al. The effect of creatine on treadmill running with high-intensity intervals. Journal of Strength and Conditioning Research, 2003. Randomised placebo-controlled trial, 15 footballers (8 women, 7 men), 6 days; funding not stated on PubMed. PubMed 12930167.
15. Forbes SC, et al. Creatine monohydrate supplementation does not augment fitness, performance, or body composition adaptations in response to four weeks of high-intensity interval training in young females. International Journal of Sport Nutrition and Exercise Metabolism, 2017. Randomised placebo-controlled trial, 17 women, 4 weeks; funding not stated on PubMed. PubMed 27768397.
16. Watson G, et al. Creatine use and exercise heat tolerance in dehydrated men. Journal of Athletic Training, 2006. Double-blind randomised crossover, 12 men, 7 days; funding not stated on PubMed. PubMed 16619091.
17. Powers ME, et al. Creatine supplementation increases total body water without altering fluid distribution. Journal of Athletic Training, 2003. Randomised, 32 trained men and women, 28 days; funding not stated on PubMed. PubMed 12937471.
18. Ahmun RP, et al. The effects of acute creatine supplementation on multiple sprint cycling and running performance in rugby players. Journal of Strength and Conditioning Research, 2005. Double-blind randomised crossover, highly trained rugby players (number not given in the PubMed summary), 5 days; funding not stated on PubMed. PubMed 15705052.
19. Kreider RB, et al. Long-term creatine supplementation does not significantly affect clinical markers of health in athletes. Molecular and Cellular Biochemistry, 2003. Open-label cohort, 98 men, 21 months; non-US government research support listed on PubMed. PubMed 12701816.
20. Greenwood M, et al. Cramping and injury incidence in collegiate football players are reduced by creatine supplementation. Journal of Athletic Training, 2003. Open-label observational study, 72 men, one season; funding not stated on PubMed. PubMed 14608430.
21. Ramírez-Campillo R, et al. Effects of plyometric training and creatine supplementation on maximal-intensity exercise and endurance in female soccer players. Journal of Science and Medicine in Sport, 2016. Randomised double-blind placebo-controlled trial, 30 women, 6 weeks; funding not stated on PubMed. PubMed 26778661.
22. NHS. Water, drinks and hydration. Page last reviewed 17 May 2023. Fetched 11 November 2026. nhs.uk.

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General information, not medical advice: if you have a medical condition or take regular medication, ask your GP or pharmacist before starting creatine.