Master of Cancer Care Program, Physical Therapy Department, School of Health Sciences, Saint Francis University, Loretto, PA 15940, United States of America.
Master of Cancer Care Program, Physical Therapy Department, School of Health Sciences, Saint Francis University, Loretto, PA 15940, United States of America.
Physiol Behav. 2019 May 15;204:277-282. doi: 10.1016/j.physbeh.2019.02.041. Epub 2019 Mar 1.
Sedentary behaviors are associated with numerous adverse physiological health outcomes, morbidity and mortality, although with limited knowledge in young adults.
To assess the association between sedentary behavior, muscular strength and body composition in male and female young adult college students.
A cross-sectional pilot study was conducted among 94 college students (20.2 ± 1.6 years, 46 males and 48 females) from a University in the Mid-Atlantic region, US. Students were assessed for sedentary behavior, physical activity and objective physiological variables including lean body mass (LBM), fat% and muscular strength [1-Repetition Maximum (1-RM)]. Descriptive statistics and linear regression analysis were conducted.
Sedentary behavior (sitting time ≥ 6 h/day) was prevalent in 69% of females and in 46% of males, p = .036, although most students (84-94%) met the physical activity recommendations. Sitting time inversely correlated with LBM (r = -0.58, p = .01) and trending for positive correlation with fat% in females, whereas in males, sitting time inversely correlated with 1-RM upper body strength (r = -0.46, p = .017). Female students who sat ≥7.5 h/day had approximately 10-fold increased chance of being obese [odds ratio = 9.6, 95% confidence interval (1.5 to 62.7), p = .019] compared to non-sedentary.
Although most students were physically active, considerable prevalence of sedentary behavior was observed. The novel findings showed that, sedentary behavior was associated with compromised physiological health determinants of body composition in females and muscular strength in males. Reducing sedentary behavior among active college students could be a public health strategy for health promotion and chronic disease prevention.
久坐行为与许多不良生理健康结果、发病率和死亡率有关，尽管在年轻成年人中知之甚少。
评估男性和女性年轻成年大学生久坐行为、肌肉力量和身体成分之间的关系。
在美国中大西洋地区一所大学的 94 名大学生（20.2±1.6 岁，46 名男性和 48 名女性）中进行了一项横断面试点研究。学生们评估了久坐行为、身体活动和客观生理变量，包括瘦体重（LBM）、脂肪百分比和肌肉力量[1 重复最大值（1-RM）]。进行了描述性统计和线性回归分析。
69%的女性和 46%的男性存在久坐行为（每天坐着时间≥6 小时），p=0.036，尽管大多数学生（84-94%）符合身体活动建议。坐着时间与 LBM 呈负相关（r=-0.58，p=0.01），且女性中与脂肪百分比呈正相关趋势，而在男性中，坐着时间与上半身 1-RM 力量呈负相关（r=-0.46，p=0.017）。每天坐着时间≥7.5 小时的女性学生肥胖的几率增加约 10 倍[比值比=9.6，95%置信区间（1.5 至 62.7），p=0.019]。
尽管大多数学生身体活跃，但观察到相当大的久坐行为发生率。新发现表明，久坐行为与女性身体成分和男性肌肉力量的生理健康决定因素受损有关。在活跃的大学生中减少久坐行为可能是促进健康和预防慢性病的公共卫生策略。
