女性和男性士兵负重行军的心肺反应。

Cardiorespiratory responses of load carriage in female and male soldiers.

机构信息

Department of Medical Imaging and Physiology, Skåne University Hospital, Department of Translational Medicine, Lund University, Sweden; Rydberg Laboratory for Applied Science, Halmstad University, Sweden; Swedish Armed Forces, Eksjö, Sweden.

Department of Medical Imaging and Physiology, Skåne University Hospital, Department of Translational Medicine, Lund University, Sweden.

出版信息

Appl Ergon. 2022 May;101:103710. doi: 10.1016/j.apergo.2022.103710. Epub 2022 Feb 22.

DOI:10.1016/j.apergo.2022.103710

PMID:35217405

Abstract

PURPOSE

To investigate the effect of sex and load carriage on cardiorespiratory responses to high intensity exercise in male and female soldiers.

METHODS

Soldiers (9 women, 9 men) performed a graded treadmill test until exhaustion with no load (NL) and combat-gear with body armor (CG). Cohen's d effect sizes, paired t-tests and ANOVA were used to study differences between conditions. A mixed linear regression model analyzed the relationship between heart rate (HR) and oxygen uptake (V̇O) with load and between sexes.

RESULTS

Wearing CG resulted in, for both sexes, a decreased time to exhaustion (-11 min), lower V̇O (L/min) ES = 0.56; VO (mL//kg/min) ES = 2.44, both p < 0.001, a net decrease in minute ventilation (ES = 3.53) and no change in HR. No sex-difference were present except for absolute V̇O. The VO and HR relationship showed a cardiorespiratory reduction wearing CG vs. NL. Added load was equal between sexes, although female soldiers' CG relative to body mass was higher (25%) than male soldiers' (20%), p < 0.01.

CONCLUSION

Wearing CG reduces soldiers' cardiorespiratory capacity and exercise performance level, although the reduction cannot be explained solely based on the added load of CG, instead CG seems to restrict the capacity to fully ventilate. No sex differences were found in relative cardiorespiratory responses to wearing CG compared to NL.

摘要

目的

研究性别和负重对男性和女性士兵高强度运动时心肺反应的影响。

方法

9 名女性和 9 名男性士兵分别在无负重（NL）和穿着战斗装备（CG）时进行递增式跑步机测试，直至力竭。采用 Cohen's d 效应大小、配对 t 检验和 ANOVA 来研究不同条件之间的差异。混合线性回归模型分析了心率（HR）和摄氧量（V̇O）与负荷以及性别之间的关系。

结果

对于男女两性，穿着 CG 导致力竭时间缩短（-11 分钟），V̇O（L/min）ES 为 0.56；VO（mL/kg/min）ES 为 2.44，均p<0.001，分钟通气量净减少（ES 为 3.53），而 HR 无变化。除绝对 V̇O 外，无性别差异。与 NL 相比，穿着 CG 时 VO 和 HR 的关系显示心肺功能降低。尽管女性士兵的 CG 相对于体重的比例（25%）高于男性士兵（20%），p<0.01，但 CG 之间的负荷增加没有性别差异。