Observational study of the effects of maximal oxygen uptake on cognitive function and performance during prolonged military exercise.

IF 1.4 4区 医学 Q2 MEDICINE, GENERAL & INTERNAL Bmj Military Health Pub Date : 2024-09-03 DOI:10.1136/military-2024-002757
Torbjörn Helge, M Windahl, F Björkman
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Abstract

Introduction: Military operations place high demands on many cognitive functions, and stressful events characterise the military work environment. The study aimed to examine the relationship between cardiorespiratory fitness, stress response, cognitive function and military performance during prolonged military exercise.

Methods: 66 army cadets were included in the study. The subjects participated in a 4.5-day military winter training in northern Sweden. Maximal oxygen uptake (VO2max) was estimated from a cycle test. Cognitive tests (design fluency, DF test) and measurements of heart rate variability (HRV) were conducted before and after the exercise. Assessment of military performance as an individual soldier (P-ind) and performance as a team leader (P-lead) was carried out during the final day of the exercise. Pearson's coefficient of correlation (r) and Spearman's rho were used to evaluate correlations, and linear regressions were used to examine the relationships between VO2max, HRV, DF test scores and military performance. Simple mediation analyses were performed with DF test scores and military performance (P-ind, P-lead) as dependent variables, VO2max as a predictor and HRV as a mediator.

Results: Post-exercise HRV was related to military performance (P-ind: r=0.40, p<0.01; P-lead: r=0.32, p<0.05). Absolute VO2max was positively correlated with P-ind (r=0.28, p<0.05), and the effect of VO2max on military performance was mediated by HRV. Post-test DF scores were negatively correlated with post-exercise HRV (total correct designs: r=-0.26, p<0.05; total incorrect designs: r=-0.27, p<0.05).

Conclusions: Results suggest that high absolute VO2max predicts military performance by reducing the stress response to prolonged military exercise. Aerobic capacity may provide a meaningful effect on the ability to preserve military performance. Future studies need to identify thresholds for this capacity.

Pre-registration: The protocol was retrospectively registered at OSF (https://osf.io/), registration DOI 10.17605/OSF.IO/ND6XM.

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关于最大摄氧量对长时间军事训练中认知功能和表现的影响的观察研究。
简介军事行动对许多认知功能提出了很高的要求,压力事件是军事工作环境的特点。本研究旨在探讨长时间军事训练期间心肺功能、应激反应、认知功能和军事表现之间的关系。受试者在瑞典北部参加了为期 4.5 天的冬季军事训练。最大摄氧量(VO2max)通过循环测试进行估算。运动前后进行了认知测试(设计流畅性、DF 测试)和心率变异性测量。在演习的最后一天,对单兵军事表现(P-ind)和团队领导表现(P-lead)进行了评估。皮尔逊相关系数(r)和斯皮尔曼相关系数(Spearman's rho)用于评估相关性,线性回归用于研究最大氧饱和度、心率变异、DF 测试得分和军事表现之间的关系。以 DF 测试得分和军事表现(P-ind、P-lead)为因变量,以 VO2max 为预测变量,以心率变异为中介变量,进行简单中介分析:结果:运动后心率变异与军事表现相关(P-ind:r=0.40,p0.01;P-lead:r=0.32,p2max 与 P-ind 呈正相关(r=0.28,p2max 对军事表现的影响受心率变异影响)。测试后 DF 分数与运动后心率变异呈负相关(总正确设计:r=-0.26,pr=-0.27,p结论:结果表明,高绝对 VO2max 可通过降低长时间军事锻炼的应激反应来预测军事表现。有氧能力可能会对保持军事表现的能力产生有意义的影响。未来的研究需要确定这种能力的阈值:该方案在 OSF(https://osf.io/)进行了回顾性注册,注册 DOI 10.17605/OSF.IO/ND6XM。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Bmj Military Health
Bmj Military Health MEDICINE, GENERAL & INTERNAL-
CiteScore
3.10
自引率
20.00%
发文量
116
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