Consortium for Health and Military Performance, Department of Military & Emergency Medicine, Uniformed Services University, USA.
Department of Preventive Medicine & Biostatistics, Uniformed Services University, USA.
J Sci Med Sport. 2019 Jan;22(1):59-64. doi: 10.1016/j.jsams.2018.05.023. Epub 2018 May 31.
Regular vigorous physical activity (PA) and high levels of physical fitness (PF) confer health benefits. Conversely, sedentary time is a risk factor for chronic illness, independent of PA. We evaluated associations between self-reported PA, sedentary time, and objective PF measures in military Service members.
Cross-sectional study including 10,105 Air Force Millennium Cohort participants with a valid physical fitness assessment (PFA).
Linear regression assessed associations between self-report PA, screen time, and usual activity and abdominal circumference (AC) and VO max; logistic regression was used for PFA failure. We stratified by age and sex.
Men who self-reported high versus low levels of PA had greater AC (19-29 years: β=0.23in., 95% CI 0.07, 0.39; 30-39 years: β=0.45in., 95% CI 0.17, 0.72). High versus low self-reported PA was also associated with greater VOMax (β=:0.81-1.41mL/kg/min). Self-reported strength training for ≥2days/week was associated with greater VOMax in 19-29year old men (β=0.84mL/kg/min, 95% CI 0.09, 0.60) and 30-39year old women (β=0.74mL/kg/min, 95% CI 0.02, 1.46). For younger men and women,<2h of screen time/day was associated with greater VOMax (Males 19-29years: β=0.23mL/kg/min, 95% CI 0.44, 1.26; Females 19-29years: β=0.83mL/kg/min, 95% CI 0.25, 1.42). PA was not associated with PFA failure, while screen time was (Males OR: 0.32-0.65, 95% CI 0.17-0.92, p<0.001-0.016).
Self-reported PA and screen time were associated with some objective PF measures, including VOMax and AC. However, screen time alone was associated with PFA failure.
有规律的剧烈身体活动（PA）和高水平的身体适应性（PF）带来健康益处。相反，久坐时间是慢性疾病的一个风险因素，与 PA 无关。我们评估了军事人员中自我报告的 PA、久坐时间和客观 PF 测量之间的关联。
包括 10105 名空军千禧年队列参与者的横断面研究，他们有有效的体能评估（PFA）。
线性回归评估了自我报告的 PA、屏幕时间和日常活动与腰围（AC）和 VOmax 的关系；逻辑回归用于 PFA 失败。我们按年龄和性别分层。
与低水平 PA 相比，报告高水平 PA 的男性 AC 更大（19-29 岁：β=0.23 英寸，95%CI 0.07，0.39；30-39 岁：β=0.45 英寸，95%CI 0.17，0.72）。与低水平 PA 相比，高 PA 还与更高的 VOmax 相关（β=：0.81-1.41mL/kg/min）。每周至少两天进行自我报告的力量训练与 19-29 岁男性（β=0.84mL/kg/min，95%CI 0.09，0.60）和 30-39 岁女性（β=0.74mL/kg/min，95%CI 0.02，1.46）的更高 VOmax 相关。对于年轻男性和女性，每天<2 小时的屏幕时间与更高的 VOmax 相关（19-29 岁男性：β=0.23mL/kg/min，95%CI 0.44，1.26；19-29 岁女性：β=0.83mL/kg/min，95%CI 0.25，1.42）。PA 与 PFA 失败无关，而屏幕时间则与之相关（男性 OR：0.32-0.65，95%CI 0.17-0.92，p<0.001-0.016）。
自我报告的 PA 和屏幕时间与一些客观的 PF 测量指标相关，包括 VOmax 和 AC。然而，仅屏幕时间与 PFA 失败有关。
