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• W2937946003 abstract "Stressful situations are common in the military, and understanding how stress impacts subjective ratings is important for mission success. Subjective sleepiness, fatigue, and negative mood have been linked to performance impairments. Performance has also been linked to unit-level subjective ratings of perceived state. However, little is known about how stressful operational conditions and military group assignment impact perceptions of sleepiness, fatigue, and mood. This analysis aims to examine the influences of a live-fire exercise and platoon membership on subjective ratings of sleepiness, fatigue, and mood. Forty-six participants [42 males (mean age 24.5±4.2 SD)] were recruited from a sample of active-duty Soldiers belonging to three platoons. The study was planned around a 72-hour simulated mission culminating in a live-fire exercise (LFX), consisting of physical and cognitive stressors and marksmanship. Visual Analog Scales (VAS) capturing subjective tiredness (extremely tired-not tired at all), fatigue (least fatigue-most fatigue), sleepiness (sleepy-alert), hostility (hostile-friendly), and happiness (happy-sad) were assessed before and after the LFX. Data was analyzed with repeated measures ANOVA to assess the effects of Time (Pre-LFX, Post-LFX) and Platoon (A, B, C). Significant main effects of Time and Platoon were observed on subjective ratings of tiredness, fatigue, and hostility (p<0.05), while only significant main effects of Time (Pre, Post) were observed for ratings of sleepiness and happiness (p<0.05). All subjective ratings were worse following the LFX. No significant interaction effects were observed. The live-fire exercise increased subjective ratings of tiredness, fatigue, and sleepiness, and had a negative impact on subjective mood states. Platoon membership also influenced select measures associated with fatigue and mood. As increases in tiredness, fatigue, and sleepiness and decreased mood may negatively impact performance, understanding how a stressful event during a mission influences subjective ratings may lead to insight on sustaining performance in the operational context. Further analysis is needed to explore the direct relationship of these variables on performance in the live-fire exercise. Military Operational Medicine Research Program and Natick Soldier Research Development Engineering Center." @default.
• W2937946003 created "2019-04-25" @default.
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• W2937946003 date "2019-04-01" @default.
• W2937946003 modified "2023-09-25" @default.
• W2937946003 title "0162 Effects Of A Live-fire Military Exercise And Group Membership On Subjective Sleepiness, Fatigue, And Mood" @default.
• W2937946003 doi "https://doi.org/10.1093/sleep/zsz067.161" @default.
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