TY  - JOUR
PY  - 2023//
TI  - The effect of a night shift nap on post-night shift performance, sleepiness, mood, and first recovery sleep: a randomized crossover trial
JO  - Scandinavian journal of work, environment and health
A1  - Patterson, P. Daniel
A1  - Hilditch, Cassie J.
A1  - Weaver, Matthew D.
A1  - Roach, David G. L.
A1  - Okerman, Tiffany S.
A1  - Martin, Sarah E.
A1  - Patterson, Charity G.
A1  - Weiss, Leonard S.
SP  - ePub
EP  - ePub
VL  - ePub
IS  - ePub
N2  - OBJECTIVES: This study aimed to test the effect of a 30-minute nap versus a 2-hour nap opportunity taken during a simulated night shift on performance, fatigue, sleepiness, mood, and sleep at the end of shift and during post-night shift recovery. <br><br>METHODS: We conducted a randomized crossover trial of three nap conditions (30-minute, 2-hour, and no-nap) during 12-hour simulated night shifts. We tested for differences in performance, fatigue, sleepiness, mood, and sleep during in-lab and at-home recovery. Performance was measured with the Brief Psychomotor Vigilance Test (PVT-B). Subjective ratings were assessed with single-item surveys. <br><br>RESULTS: Twenty-eight individuals consented to participate [mean age 24.4 (standard deviation 7.2) years; 53.6% female; 85.7% Emergency Medical Services clinicians]. PVT-B false starts at the end of the 12-hour night shift (at 07:00 hours) and at the start of in-lab recovery (08:00 hours) were lower following the 2-hour nap versus other conditions (P<0.05). PVT-B response time at +0 minutes post-recovery nap was poorer compared to pre-recovery nap for the no-nap condition (P=0.003), yet not detected for other nap conditions (P>0.05). Sleepiness, fatigue, and some mood states were lower at most hourly assessments during the in-lab recovery period following the 2-hour nap condition compared to the other conditions. Sleep during recovery did not differ by duration of night shift nap. <br><br>CONCLUSIONS: A 2-hour nap opportunity versus a 30-minute or no-nap opportunity is beneficial for performance, alertness, and mood post-night shift. No differences were detected in sleep during recovery.<p />  <p>Language: en</p>
LA  - en
SN  - 0355-3140
UR  - http://dx.doi.org/10.5271/sjweh.4129
ID  - ref1
ER  -