A disruption and reduction in the number of hours of sleep normally needed by a person. There is no standard or minimum number of hours per night regarded as necessary for everyone. Athletes appear to be able to adapt to sleep losses of up to 2 h per night without impairing their exercise performance. Greater losses, however, are associated with reduced reaction time, poorer coordination, and lower vigilance, all of which adversely affect some athletic performances. Complete sleep deprivation for 1–3 nights can produce distinct alterations in personality with subjects exhibiting psychotic-like symptoms and bizarre behaviour. Exercise often restores normal sleep patterns in people who suffer sleep disorders.
Subjects: Sports and Exercise Medicine.