Shift work: health, performance and safety problems, traditional countermeasures, and innovative management strategies to reduce circadian misalignment.

Results from several other studies are qualitatively similar, but did not reach statistical significance. 176 – 178 Naps Naps prior to or during night shifts have been shown to reduce night-shift sleepiness while improving alertness and performance. 144 , 150 , 179 – 185 Despite this improvement, napping does not overcome the decrement in alertness that remains most pronounced at the circadian nadir.

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