Effect of Sleep Extension in Prevention to Sleep Deprivation

This group will perform an incremental running test, conducted until exhaustion, in: - a control condition (usual sleep) - a one-night condition of partial sleep deprivation - a one-night partial sleep deprivation condition with 5 nights of prior extension. The order of conditions will be randomized.

This group will perform an incremental running test, conducted until exhaustion, in: - a control condition (usual sleep) - a one-night condition of partial sleep deprivation - a one-night partial sleep deprivation condition with 5 nights of prior extension. The order of conditions will be randomized.

This group will perform an incremental running test, driven to exhaustion, after a night of total sleep deprivation twice, at least two weeks apart.