Department of Psychiatry, Hualien Armed Forces General Hospital, Hualien ,Taiwan.
National Chiao Tung University, Institute of Statistics, Hsinchu City, Taiwan.
Endocr Metab Immune Disord Drug Targets. 2021;21(12):2213-2219. doi: 10.2174/1871530321666210427090550.
To investigate the influence of body mass index (BMI) on the association between psychological stress and physical fitness.
Both obesity and psychological stress reduce exercise performance.
It is unknown whether obesity may modify the relationship.
A population of 4,080 military subjects in Taiwan was divided to three groups according to the BMI ≥27.0 kg/m2 (obesity), 24.0-26.9 kg/m2 (overweight) and 18.5-23.9 kg/m2 (normal weight). Normal, slight, and great psychological stress was evaluated by the Brief Symptoms Rating Scale (BSRS-5) score ≤5, 6-9, and ≥10, respectively. Aerobic and anaerobic fitness were respectively evaluated by time for a 3000-meter run and numbers of 2-minute sit-ups and 2-minute push-ups. Analysis of covariance (ANCOVA) with adjustments for age and sex was used to determine the relationship.
The mean time (sec) for a 3000-meter run (standard error) under slight and great stress differed from that under normal stress in the normal weight (881.0 (11.0) and 877.9 (5.8) vs. 862.2 (1.7), p=0.089 and 0.0088, respectively) and in the obesity (928.1 (16.8) and 921.8 (10.7) vs. 895.2 (1.6), p=0.054 and 0.016, respectively), while the differences were not significant in the overweight (877.1 (12.7) and 877.5 (7.1) vs. 867.1 (2.1), both p >0.5). The impacts of the BMI on 2-minute sit-ups had a similar pattern with that on a 3000-meter run whereas the impact of the BMI on 2-minute push-ups was insignificant.
Mental stress may not affect physical fitness in overweight military personnel. The mechanism is not clear and should be further investigated.
探讨体重指数（BMI）对心理压力与身体健康之间关联的影响。
肥胖和心理压力都会降低运动表现。
目前尚不清楚肥胖是否会改变这种关系。
台湾的 4080 名军事人员被分为三组，根据 BMI≥27.0kg/m2（肥胖）、24.0-26.9kg/m2（超重）和 18.5-23.9kg/m2（正常体重）进行分组。正常、轻度和重度心理压力分别通过 BriefSymptomsRatingScale（BSRS-5）评分≤5、6-9 和≥10 来评估。有氧运动和无氧运动能力分别通过 3000 米跑时间和 2 分钟仰卧起坐次数及 2 分钟俯卧撑次数来评估。采用协方差分析（ANCOVA），并调整年龄和性别，以确定关系。
在正常体重者中，轻度和重度压力下的 3000 米跑时间（标准误差）与正常压力下的时间不同（881.0（11.0）和 877.9（5.8）比 862.2（1.7），p=0.089 和 0.0088），在肥胖者中也是如此（928.1（16.8）和 921.8（10.7）比 895.2（1.6），p=0.054 和 0.016），而在超重者中差异不显著（877.1（12.7）和 877.5（7.1）比 867.1（2.1），均 p>0.5）。BMI 对 2 分钟仰卧起坐的影响与 3000 米跑的影响相似，而 BMI 对 2 分钟俯卧撑的影响则不显著。
心理压力可能不会影响超重军事人员的身体健康。其机制尚不清楚，需要进一步研究。
