Sleep and Athletic Performance: Impacts on Physical Performance, Mental Performance, Injury Risk and Recovery, and Mental Health
An Update. Athletes are at high risk of short, poor, irregular and mistimed sleep, and sleep loss impairs strength, speed, cognition and injury recovery
Key Findings (abstract)
The risk is high for athletes on several fronts: too little sleep, poor-quality sleep, sleepiness and fatigue during the day, sleep schedules that are suboptimal or irregular, and sleep and circadian disorders.
Losing sleep, sleeping poorly, or both can hurt muscular strength, speed and other facets of physical performance.
Sleep problems can increase the risk of concussions and other injuries and impair recovery after injury.
Cognitive performance is affected across several domains: vigilance, learning and memory, decision making, and creativity.
The review is an update; the abstract itself carries no effect sizes, thresholds or timelines.
Practical Application
This narrative review (an update) finds that athletes are at high risk of short, poor-quality, irregular and mistimed sleep and of sleep/circadian disorders, and that sleep loss or poor sleep can impair muscular strength, speed and other physical performance, raise the risk of concussion and other injuries, slow recovery after injury, and degrade vigilance, learning and memory, decision-making and creativity. So sleep belongs in the training plan as a load-bearing element — a bad stretch of nights is a reason to expect less from hard sessions and to protect the athlete from injury-prone situations, not a detail.
Inference, not tested here: because the impairments span physical output, cognition and injury risk, a poor night before a technical or high-speed session (descents, group riding, sprint work) matters more than one before an easy day.
Limitations
Narrative review: it carries the shape of the evidence, not new data; every number an athlete needs has to come from the primary entries it points to.
The abstract gives no effect sizes, dose thresholds or timelines.
How this entry was checked and changed
Why this level
regraded 2026-09-27 from A: narrative review without systematic method, from a leading sleep-research group
Content correction 2026-09-27
"Injury risk +60-70% at <7 h in the next 7-10 days", "<8 h for 2 weeks raises DNS/DNF", "jet lag ~1 day per time zone, eastward faster than westward", "GH 60-70% in the first 2 SWS cycles, fragmentation −30-40%", "2-3 days elevated sleep need post-event" -> none of these figures are in the abstract (and the jet-lag direction is doubtful); removed.
House protocols ("arrive 2-3 days early", "deep sleep <5% and HRV −10% → reschedule", "heat sessions before 16:00", weeks 1-6 / 7-14 / 13-14 plan) -> not from the paper; removed or moved to a "base's own practice" pointer.
Level A -> B+: narrative review (update), no systematic method.
Resync 2026-09-28: Said REF-001 covers heat acclimation timing vs sleep -> sleep not studied.