Randomized Trialhigh evidence
Circadian phenotype is associated with diurnal variation in human exercise performance.
European journal of applied physiology·July 15, 2026·PMID 42455307
Why it mattersIndividual circadian phenotype influences the size of the well-known evening advantage in endurance performance, suggesting that exercise testing and training prescription could be optimized by considering an athlete's chronotype and habitual sleep timing.
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