alexa Level of sleepiness and total sleep time following various time in bed conditions.
Neurology

Neurology

Journal of Sleep Disorders & Therapy

Author(s): Rosenthal L, Roehrs TA, Rosen A, Roth T

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Abstract The effects of various time in bed (TIB) conditions on daytime sleepiness and total sleep time (during a 24-hour enforced bedtime) were investigated. Thirty-two healthy male subjects participated in the study. Subjects were assigned to one of four groups to balance average screening multiple sleep latency tests (MSLT). Subjects were randomly assigned to spend 8, 6, 4 or 0 hours time in bed. They underwent the same TIB condition twice with at least 7 days between the two sessions. Following their assigned time in bed conditions, subjects were counterbalanced to have a standard MSLT and a 24-hour enforced bedtime protocol. To assess the effect of TIB on the MSLT, the sleep latencies were submitted to a four (TIB condition) by four (nap test) multivariate analysis of variance. The sleep latencies were shorter for those subjects in the 0-hours condition when compared to the other three conditions. Also, the sleep latencies of those subjects in the 4- and 6-hour conditions were comparable but different from those of subjects in the 8- and 0-hour TIB conditions. To assess the effect of TIB on the 24-hour enforced bedtime, the total sleep time during this period was submitted to a six (4-hour block) by four (TIB condition) multivariate analysis of variance. Subjects slept more following 0 hours TIB when compared to the other three conditions. There were no statistically significant differences between the 8-, 6- and 4-hour TIB conditions. Across conditions, subjects slept more during the first 4 hours when compared to blocks 2, 3, 4 and 5. Blocks 1 and 6 were comparable.(ABSTRACT TRUNCATED AT 250 WORDS)
This article was published in Sleep and referenced in Journal of Sleep Disorders & Therapy

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