title: Adaptation to irregularity of rest and activity.
abstract: The adaptation to a 9-d schedule of irregular rest and activity was studied. Sleep was recorded; patterns of oral temperature, urinary excretion, and performance at a series of tasks were measured. The relationships between circadian rhythmicity, length of time on task, and cumulative sleep loss were examined.
mesh_terms: D000204:Activity Cycles; D000222:Adaptation, Physiological; D000328:Adult; D001831:Body Temperature; D002940:Circadian Rhythm; D004569:Electroencephalography; D004573:Electrolytes / Q000652:urine; D006801:Humans; D008297:Male; D012890:Sleep / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology; D013997:Time Factors
chemical_list: D004573:Electrolytes