San Diego State University/University of California, San Diego, Joint Doctoral Program in Public Health (Epidemiology), San Diego, CA, USA.
Academic General Pediatrics, Child Development, and Community Health, University of California, San Diego, San Diego, CA, USA.
Pediatr Res. 2023 Sep;94(3):1209-1215. doi: 10.1038/s41390-023-02616-z. Epub 2023 May 2.
This study investigates the cross-sectional and prospective associations between accelerometer-measured sedentary behavior and body composition from adolescence to early adulthood.
Data from the Santiago Longitudinal Study were analyzed (n = 212). Sedentary time was measured at age 16 years, and body composition (body mass index [BMI], waist circumference, waist-to-height ratio [WHtR], fat mass percentage, and lean mass percentage) was examined at both age 16 and 23 years. Adjusted linear regression models estimated associations between sedentary time, sedentary bout duration, and body composition, overall and by sex.
In all analyses, mean sedentary bout duration was not associated with body composition. In cross-sectional analyses, more sedentary time during adolescence was significantly associated with lower BMI, waist circumference, WHtR, fat mass percentage, and higher lean mass percentage (p < 0.05). One standard deviation increase in daily sedentary time was prospectively associated with lower body mass index (β = -1.22 kg/m, 95% CI: -2.02, -0.42), waist circumference (β = -2.39 cm, 95% CI: -4.03, -0.75), and WHtR (β = -0.014, 95% CI: -0.024, -0.004). Sedentary time at 16 years was not associated with changes in body composition from 16 to 23 years.
Sedentary behavior in adolescence is not adversely associated with body composition profiles in early adulthood.
Little is known about the effect of device-measured sedentary behavior on body composition during the transition from adolescence to early adulthood. Among participants in the Santiago Longitudinal Study, more accelerometer-measured sedentary time during adolescence was associated with lower BMI, waist circumference, and waist-to-height ratio in early adulthood though point estimates were generally small in magnitude. Sedentary behavior in adolescence was not detrimentally associated with healthy body composition profiles in early adulthood. Public health interventions aimed at reducing obesity rates could consider other behaviors, such as physical activity and healthy diet, instead of sitting time.
本研究旨在调查青少年至成年早期期间，计步器测量的久坐行为与身体成分之间的横断面和前瞻性关联。
对圣地亚哥纵向研究的数据进行了分析（n=212）。16 岁时测量久坐时间，16 岁和 23 岁时检查身体成分（体重指数[BMI]、腰围、腰高比[WHtR]、体脂肪百分比和瘦体重百分比）。调整后的线性回归模型估计了久坐时间、久坐时间持续时间与身体成分之间的总体关联以及按性别分层的关联。
在所有分析中，平均久坐时间持续时间与身体成分均无关联。在横断面分析中，青少年时期久坐时间较多与 BMI、腰围、WHtR、体脂肪百分比较低以及瘦体重百分比较高显著相关（p<0.05）。每天久坐时间增加一个标准差，与较低的 BMI（β=-1.22kg/m，95%置信区间：-2.02，-0.42）、腰围（β=-2.39cm，95%置信区间：-4.03，-0.75）和 WHtR（β=-0.014，95%置信区间：-0.024，-0.004）呈前瞻性相关。16 岁时的久坐时间与 16 岁至 23 岁期间身体成分的变化无关。
青少年时期的久坐行为与成年早期的身体成分特征无不良关联。
青少年时期使用设备测量的久坐行为对从青少年到成年早期过渡期间的身体成分的影响知之甚少。在圣地亚哥纵向研究的参与者中，青少年时期的计步器测量久坐时间较多与成年早期时 BMI、腰围和腰高比较低相关，但点估计值的幅度通常较小。青少年时期的久坐行为与成年早期的健康身体成分特征无不良关联。旨在降低肥胖率的公共卫生干预措施可以考虑其他行为，例如体育活动和健康饮食，而不是久坐时间。
