Effects of two nights partial sleep deprivation on an evening submaximal weightlifting performance; are 1 h powernaps useful on the day of competition?

Brotherton, Ellis J; Moseley, Sarah E; Langan-Evans, Carl; Pullinger, Samuel A.; Robertson, Colin M.; Burniston, Jatin G.; Edwards, Ben

doi:10.1080/07420528.2018.1552702

Cited by 32 publications

(57 citation statements)

References 58 publications

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“…Our results were consistent with those reported by other studies confirming the beneficial effect of napping on cognitive [ 11 , 14 , 16 ] and physical performance [ 11 , 12 , 13 , 15 , 16 , 17 , 28 , 29 , 31 , 32 ], independent of the previous night’s sleep. For example, following a normal night sleep, it has been shown that (i) a 25-min nap opportunity enhanced performance during the 5mSRT [ 12 ], (ii) a 25-min, 35-min and 45-min nap opportunity increased physical performance during the 5mSRT [ 13 ], (iii) a 35-min and 45-min nap opportunity enhanced 5 jump performance [ 11 ], and (iv) a 45-min [ 11 ] and 90-min [ 10 ] nap improved attention estimated by the digit cancelation test (DCT).…”

Section: Discussionsupporting

confidence: 93%

A 90 min Daytime Nap Opportunity Is Better Than 40 min for Cognitive and Physical Performance

Boukhris

Trabelsi

Ammar

et al. 2020

IJERPH

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This study examined the effects of different nap durations on attention and physical performance as well as mood states, sleepiness, perceived exertion (RPE), recovery (PRS), and muscle soreness (DOMS) in trained men. Fourteen amateur team sport players (age: 20.3 ± 3.0 years, height: 173.1 ± 6.7 cm, body-mass: 68.1 ± 6.6 kg) performed a maximal voluntary isometric contraction (MVIC) test, 5-m shuttle run, and the digit-cancellation (i.e., attention) test after a no-nap (N0) and 40-min (N40) and 90-min (N90) of nap opportunities. Subjective measurement of mood states, RPE, PRS and DOMS were determined. Compared to N0, both nap durations enhanced attention, MVIC, total distance (TD), and higher distance (HD) (p < 0.001), with a higher gain after N90 compared to N40 for attention (Δ = +3), MVIC (Δ = +30 N) and TD (Δ = +35 m) (p < 0.001). Total mood scores were better after N40 and N90 compared to N0 (p < 0.05), with lower scores after N90 compared to N40 (p < 0.05). DOMS and RPE scores were significantly lower and PRS was significantly higher after N40 and N90 compared to N0 and after N90 compared to N40 (p < 0.05). Although both nap opportunity durations were beneficial, N90 was better than N40 for improving physical performances and attention as well as the perception of recovery, reducing fatigue perception, muscle soreness, and negative mood states.

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Section: Discussionsupporting

confidence: 93%

A 90 min Daytime Nap Opportunity Is Better Than 40 min for Cognitive and Physical Performance

Boukhris

Trabelsi

Ammar

et al. 2020

IJERPH

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“…For example, the duration between the nap and the physical task was only 30 min in the study of Waterhouse et al (2007). Sleep inertia usually takes approximately 1 h to dissipate (Brotherton et al, 2019). Therefore, in the present study, there are more than 2 h between the nap opportunity and the test session.…”

Section: Discussionmentioning

confidence: 99%

Nap Opportunity During the Daytime Affects Performance and Perceived Exertion in 5-m Shuttle Run Test

et al. 2019

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Purpose To compare the effect of different durations of nap opportunity during the daytime on repeated high-intensity short-duration performance and rating of perceived exertion (RPE). Methods Seventeen physically active men (age: 21.3 ± 3.4 years, height: 176.7 ± 5.9 cm, body mass: 71.8 ± 10.2 kg) performed a 5 m shuttle run test [to determine best distance (BD), total distance (TD), and fatigue index (FI)] under four conditions: a 25 min nap opportunity (N25), a 35 min nap opportunity (N35), a 45 min nap opportunity (N45), and control condition (no-nap) (N0). The sleep quality of each nap opportunity was evaluated using a scale ranging from 0 “no sleep” to 10 “uninterrupted, deep sleep throughout.” The four conditions were performed in a random order. RPE was recorded after each repetition of the 5 m shuttle run test and the mean score was calculated. Results BD increased after N25 (+6%) and N45 (+9%) compared to N0 ( p < 0.05) and was significantly higher after N45 compared to N35 ( p < 0.05). Compared to N0, the three nap opportunity durations enhanced TD ( p < 0.05) with greater enhancement after N45 compared to N25 (+8% vs. +3%) and N35 (+8% vs. +3%). For FI, no-significant differences were observed between the three nap opportunity durations and N0. The mean RPE score was significantly higher after N25 (+20%) and N0 (+19%) compared to N45 ( p < 0.05). All participants were able to fall asleep during each nap condition with a sleep quality score of 6.9 ± 1.0, 7.0 ± 0.7, and 7.1 ± 0.8 for N25, N35, and N45. Conclusion A nap opportunity during the daytime was beneficial for physical performance and perceived exertion with the N45 being the most effective for improving performance and reducing fatigue during the 5 m shuttle run test. The implication of the present study is that athletes might benefit from a nap opportunity of 25, 35 or 45 min before practice or before a competition.

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“…79 The potential cognitive, health (physical and mental), and psycho-social benefits of intra-shift napping are numerous, and is also deserving of much attention. [80][81][82][83] Our commentary was not based on a systematic review of the evidence; however, we reference several recently published systematic reviews, including meta-analyses, which suggest that on balance, intra-shift napping has numerous benefits and should be supported. 10,23 The optimal duration of naps is unknown and may depend on the work environment.…”

Section: Discussionmentioning

confidence: 99%

Should public safety shift workers be allowed to nap while on duty?

Patterson

Weaver

Guyette

et al. 2020

American J Industrial Med

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Fatigue and sleep deficiency among public safety personnel are threats to wellness, public and personal safety, and workforce retention. Napping strategies may reduce work‐related fatigue, improve safety and health, yet in some public safety organizations it is discouraged or prohibited. Our aim with this commentary is to define intra‐shift napping, summarize arguments for and against it, and to outline potential applications of this important fatigue mitigation strategy supported by evidence. We focus our discussion on emergency medical services (EMS); a key component of the public safety system, which is comprised of police, fire, and EMS. The personnel who work in EMS stand to benefit from intra‐shift napping due to frequent use of extended duration shifts, a high prevalence of personnel working multiple jobs, and evidence showing that greater than half of EMS personnel report severe fatigue, poor sleep quality, inadequate inter‐shift recovery, and excessive daytime sleepiness. The benefits of intra‐shift napping include decreased sleepiness and fatigue, improved recovery between shifts, decreased anxiety, and reduced feelings of burnout. Intra‐shift napping also mitigates alterations in clinician blood pressure associated with disturbed sleep and shift work. The negative consequences of napping include negative public perception, acute performance deficits stemming from sleep inertia, and the potential costs associated with reduced performance. While there are valid arguments against intra‐shift napping, we believe that the available scientific evidence favors it as a key component of fatigue mitigation and workplace wellness. We further believe that these arguments extend beyond EMS to all sectors of public safety.

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Effects of two nights partial sleep deprivation on an evening submaximal weightlifting performance; are 1 h powernaps useful on the day of competition?

Cited by 32 publications

References 58 publications

A 90 min Daytime Nap Opportunity Is Better Than 40 min for Cognitive and Physical Performance

A 90 min Daytime Nap Opportunity Is Better Than 40 min for Cognitive and Physical Performance

Nap Opportunity During the Daytime Affects Performance and Perceived Exertion in 5-m Shuttle Run Test

Should public safety shift workers be allowed to nap while on duty?

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