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Paying Down the Sleep Debt: Realization of Benefits During Subsequent Sleep Restriction and Recovery
WALTER REED ARMY INST OF RESEARCH SILVER SPRING MD DIV OF PSYCHIATRY AND NEUROSCIENCE
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The study objective was to determine whether sleep extension a improves alertness and performance during subsequent sleep restriction and b mediates the rate at which alertness and performance are restored by post-restriction recovery sleep. Twenty-four healthy adult participants ages 18-39 were randomly assigned to an Extended 10 hours time in bed TIB or Habitual mean SD 7.09 0.7 sleep group for one week, followed by one Baseline 10 hours or habitual TIB, seven Sleep Restriction 3 hours TIB, and five Recovery Sleep nights 8 hours TIB with performance Psychomotor Vigilance Task PVT and alertness Maintenance of Wakefulness Test MWT Stanford Sleepiness Scale SSS tests administered hourly throughout. We conclude that the extent to which sleep restriction impairs alertness and performance, and the rate at which these impairments are subsequently reversed by recovery sleep, varies as a function of the amount of nightly sleep obtained prior to the sleep restriction period.
APPROVED FOR PUBLIC RELEASE