A pilot study investigating the impact of a caffeine-nap on alertness during a simulated night shift

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2020

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Centofanti, S.
Banks, S.
Coussens, S.
Gray, D.
Munro, E.
Nielsen, J.
Dorrian, J.

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Chronobiology International, 2020; 37(9-10):1469-1473

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Abstract

Consuming coffee immediately prior to a nap, known as a caffeine-nap, has been shown to improve alertness during the day, but it is unknown whether a caffeine-nap is effective at reducing sleep inertia during the night. A simulated shiftwork cross-over laboratory study was conducted whereby participants (N = 6, 4 F, 21–36y) consumed 200 mg of caffeine, or decaffeinated coffee (placebo), immediately prior to a 30 min nap opportunity at 03:30 h. Compared to placebo, the caffeine-nap resulted in improved vigilant attention and subjective fatigue in the 45 min post-nap opportunity. The caffeine-nap may be useful in reducing sleep inertia in shift workers who nap on nightshift.

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Copyright 2020 Taylor & Francis Access Condition Notes: Accepted manuscript available on Open Access

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