The influence of a 1 h nap on performance overnight
- 1 October 1989
- journal article
- clinical trial
- Published by Informa UK Limited in Ergonomics
- Vol. 32 (10), 1193-1205
- https://doi.org/10.1080/00140138908966890
Abstract
The effect on performance overnight of a 1 h nap taken at 0200 h was studied in six young female subjects. The subjects completed three schedules, including one with a nap and two without a nap, during which either a placebo or 300 mg caffeine was ingested at 2315 h. Performance was measured from 1700 h in the evening until 1030 h the next morning. Caffeine improved performance overnight on almost all tasks compared with placebo. The nap had some limited beneficial effect compared with placebo, but most tasks remained impaired.Keywords
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