Sleep for performance in ultra endurance athletes 💤
The scientific evidence on sleep in ultra athletes.
The Role of Sleep on Physical and Cognitive Performance of Ultra-Endurance Athletes: A Systematic Review
Study Details
This new systematic review synthesised evidence from 16 studies (1,389 athletes) to examine how sleep quantity and quality influence physical and cognitive performance in ultra-endurance events 📚
Here are the key findings ⬇️
Key Findings
Sleep–performance relationship is complex 🔍
Sleep (especially total sleep time, TST) influences ultra-endurance performance, but the relationship appears non-linear and context-dependent
More sleep before the race may help ⏰
Extended sleep the night before competition was associated with better race outcomes in several studies
Sleeping during races can slow finishing times 😴
In multiple ultra events, athletes who slept less or not at all during competition often finished faster, likely reflecting strategic sleep restriction in high performers
Light sleep and certain sleep metrics may support performance 📈
Greater time in light sleep and some sleep quality markers showed positive associations with performance in specific studies, particularly in triathlon and cycling contexts
Pre-race sleep quality supports cognitive function 🧠
Better sleep quality before competition was linked with faster reaction time and improved executive function
Napping during events improves reaction time 💤
Short intra-race naps (15 - 20 min) produced meaningful improvements in reaction time during ultramarathons
Sleepiness during races harms performance 📉
Greater sleepiness and poorer sleep quality during competition were associated with worse physical outcomes
Heterogeneous evidence ⚠️
Many studies relied on self-reported sleep and had moderate risk of bias, limiting firm conclusions
Conclusion
Sleep clearly matters for ultra-endurance athletes, but timing and strategy are key 🔑
Pre-race sleep extension and strategic napping appear beneficial, whereas more sleep during competition often reflects fatigue or pacing strategy rather than improved performance ✅
Reference
https://pubmed.ncbi.nlm.nih.gov/41753086/
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