Sleep duration and next-day athletic performance

Across team and individual sports, studies link extended sleep with faster reaction times, greater accuracy, and better self-reported wellness. Sleep extension, deliberately increasing nightly sleep for several weeks, is among the clearest performance interventions measured.

The costs of shortfall are equally documented: elevated injury risk, impaired glucose regulation, and reduced training tolerance.

In practice: treat sleep as part of the training plan. A consistent schedule, a dark and cool room, and extended sleep in heavy training blocks deliver measurable returns without cost.