Comparison of Training Intensity, Energy Balance, and Sleep Duration in British Army Officer Cadets between Base and Field Exercise

Needham-Beck, Sarah; Siddall, Andrew G.; Thompson, Jane; Powell, Steven; Edwards, Victoria C.; Blacker, Sam D.; Jackson, Sarah; Greeves, Julie P.; Myers, Steve D.

doi:10.1249/01.mss.0000537196.66227.c2

Cited by 4 publications

(4 citation statements)

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“…Change in sleeping environment, and heightened stress and therefore stimulation upon arrival at BMT may have reduced restorative sleep and resulted in poorer post-sleep fatigue than later weeks. During field training of weeks 10 and 11, pre sleep fatigue was highest, which is consistent with previous studies reporting disrupted sleep resulting in fatigue during field training (Lieberman et al 2006 ; Needham-Beck et al 2018 ). Fatigue during week 12 was the lowest for BMT, suggesting that the training focus on ‘march-out’ preparations (i.e.…”

Section: Resultssupporting

confidence: 90%

“…Sleep opportunity of 6–7 h during military field training appears to be atypical when compared to previous studies. For example, in a field exercise for British officer cadets, daily sleep time decreased from 5.6 ± 1.5 h a day in barracks, to 2.1 ± 1.3 h during field work (Needham-Beck et al 2018 ); with an intentional reduction of sleep to 1 h opportunities during special forces training (Lieberman et al 2006 ). Therefore, it appears the current Australian BMT field training period may be somewhat novel, recognising the importance of sleep and its impact on performance by allowing adequate sleep opportunities.…”

Section: Resultsmentioning

confidence: 99%

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Sleep of recruits throughout basic military training and its relationships with stress, recovery, and fatigue

Bulmer

Aisbett

Drain

et al. 2022

Int Arch Occup Environ Health

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Objective Studies in basic military training (BMT) examining sleep are largely cross-sectional, and do not investigate relationships between sleep, stress, recovery and fatigue. The aims of this study were to (1a) quantify changes in recruits’ sleep quantity and quality over 12 weeks of BMT; (1b) quantify changes in recruits’ perceptions of stress, fatigue and recovery over BMT; and (2) explore relationships between sleep, and perceptions of stress, fatigue and recovery. Methods 45 recruits (37 male; 8 female, age: 25.2 ± 7.2 years, height: 176.2 ± 10.0 cm, mass: 76.8 ± 15.0 kg) wore ActiGraph GT9X’s for 12 weeks of BMT, collecting sleep duration, efficiency and awakenings. Subjective sleep quality, fatigue were measured daily, with stress and recovery measured weekly. Multi-level models assessed relationships between sleep, and stress, recovery, and fatigue. Results Objective daily means for sleep duration were 6.3 h (± 1.2 h) and 85.6% (± 5.5%) for sleep efficiency. Main effects were detected for all mean weekly values (p < 0.05). Sleep quality showed the strongest relationships with stress, recovery and fatigue. The best model to explain relationships between, stress, recovery and fatigue, included sleep quality, sleep duration, sleep efficiency and awakenings. Conclusions The reported mean sleep duration of 6.3 h per night may negatively impact training outcomes across BMT. Combining both subjective and objective measures of sleep best explained relationships between sleep metrics stress, fatigue and recovery. Perceived sleep quality was most strongly related to change in stress, recovery, or post-sleep fatigue.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Sleep of recruits throughout basic military training and its relationships with stress, recovery, and fatigue

Bulmer

Aisbett

Drain

et al. 2022

Int Arch Occup Environ Health

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“…This is consistent with 3 h (±0.3) sleep per night during U.S. Army recruit field training [ 8 ]. Sleep duration this low over an extended period can be common in military cohorts, especially during field periods [ 45 , 46 , 47 ]. Sleep opportunity was intentionally restricted during EX-FIELD with one night of no sleep opportunity due to night operations.…”

Section: Discussionmentioning

confidence: 99%

“…This could adversely affect a soldier’s ability to perform at a high level [ 8 ]. However, exposure to restricted sleep during military training is often deemed vital to simulate potential operational conditions, such as a reduction of sleep during British officer cadet training from 5.6 h (±1.5) daily on base, to 2.1 h (±1.3) during field work [ 46 ].…”

Section: Discussionmentioning

confidence: 99%

Characterising Psycho-Physiological Responses and Relationships during a Military Field Training Exercise

Bulmer

Corrigan

Drain

et al. 2022

IJERPH

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Over a 15-day period, that included an eight-day field trial, the aims of this study were to (1) quantify the physical workload, sleep and subjective well-being of soldiers in training; (2a) Explore relationships between workload and well-being, and (2b) sleep and well-being; (3) Explore relationships between workload, sleep, and well-being. Methods: Sixty-two Combat Engineer trainees (59 male, 3 female; age: 25.2 ± 7.2 years) wore an ActiGraph GT9X to monitor daily energy expenditure, physical activity, and sleep. Rating of perceived exertion (RPE), sleep quality, and fatigue were measured daily, subjective well-being was reported days 1, 5, 9, 13 and 15. Multi-level models were used for the analysis. Results: Well-being was affected by a combination of variables including workload, subjective sleep quality, sleep duration, and sleep efficiency. RPE and subjective sleep quality were consistently significant parameters within the models of best fit. Conclusions: Perceptions of well-being were lower during the field training when physical workload increased, and sleep decreased. Energy expenditure was comparatively low, while daily sleep duration was consistent with field training literature. Subjective assessments of workload and sleep quality were consistently effective in explaining variations in well-being and represent an efficient approach to monitor training status of personnel.

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Chronicity of sleep restriction during Army basic military training

Larsen

Drain

Gibson

et al. 2022

Journal of Science and Medicine in Sport

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Comparison of Training Intensity, Energy Balance, and Sleep Duration in British Army Officer Cadets between Base and Field Exercise

Cited by 4 publications

References 0 publications

Sleep of recruits throughout basic military training and its relationships with stress, recovery, and fatigue

Sleep of recruits throughout basic military training and its relationships with stress, recovery, and fatigue

Characterising Psycho-Physiological Responses and Relationships during a Military Field Training Exercise

Chronicity of sleep restriction during Army basic military training

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