青少年低强度身体活动久坐时间与体成分的关联  

Association of light-intensity physical activity, sedentary time and body composition in adolescents

作　　者：叶荣荣 黄宝莹 张东枚 谭健怡 程金群 任志强 徐鹏 黄燕红 沈佳欣 李红娟[3] 郜艳晖 YE Rongrong;HUANG Baoying;ZHANG Dongmei;TAN Jianyi;CHENG Jinqun;REN Zhiqiang;XU Peng;HUANG Yanhong;SHEN Jiaxin;LI Hongjuan;GAO Yanhui(Department of Public Health and Preventive Medicine,School of Medicine,Jinan University,Guangzhou(510632),China;不详)

机构地区：[1]暨南大学基础医学与公共卫生学院公共卫生与预防医学系,广东广州510632 [2]广东药科大学公共卫生学院流行病与卫生统计学系 [3]北京体育大学运动人体科学学院/运动与体质健康教育部重点实验室

出　　处：《中国学校卫生》2023年第10期1488-1492,共5页Chinese Journal of School Health

基　　金：国家社会科学基金教育学重点项目(ALA190015)。

摘　　要：目的 探讨低强度身体活动(LPA)和久坐行为(SB)与体成分间的关联,为改善青少年体质健康提供参考。方法于2020年8月至2021年1月,收集佛山市某中学高一年级694名学生基本信息,采用三轴加速度计和生物电阻抗测试仪测量学生24 h活动行为和体成分。采用双成分回归和等时替代模型,探讨LPA和SB与体成分间的关系。结果 LPA与较低的脂肪相对优势(FRD)有关(男生周末:FRD=-21.44%;女生一周:FRD=-17.83%,学习日FRD=-18.27%,P值均<0.05),LPA与较高的肌肉相对优势(MRD)和骨骼相对优势(BRD)有关(男生周末:MRD=12.78%,BRD=12.87%;女生一周MRD=11.64%,BRD=9.01%;女生学习日MRD=12.02%,BRD=9.23%)(P值均<0.05)。用10 min LPA替代SB可减少脂肪比例[男生:一周-0.15(-0.26~-0.04),学习日-0.12(-0.22~-0.02);女生:一周-0.18(-0.27~-0.08),学习日-0.16(-0.25~-0.07)]和增加肌肉比例[男生:一周0.14(0.03~0.24),学习日0.11(0.02~0.21);女生:一周0.17(0.07~0.26),学习日0.15(0.07~0.24)]。结论 用LPA中断连续SB可作为青少年身体活动促进体质健康的干预措施。学校应鼓励学生在课间与课外经常进行LPA,同时避免长时间SB。Objective To explore the association between light-intensity physical activity(LPA)and sedentary behavior(SB)with body composition,so as to provide data references for improving adolescent physical health.Methods From August 2020 to January 2021,general information of 694 students in grade one of a high school in Foshan City was collected,and the 24-hour activity behavior and body composition of the students were measured objectively by triaxial accelerometer and bioelectrical impedance tester.Dual-component multivariate regression and dual-compositional isotemporal substitution model were used to explore the relationship between LPA and SB and body composition.Results LPA was associated with lower fat relative dominance(FRD)(male weekends FRD=-21.44%,female weekly FRD=-17.83%,weekdays FRD=-18.27%,P<0.05),and LPA was also associated with higher muscle relative dominance(MRD)and bone relative dominance(BRD)(male weekends MRD=12.78%,BRD=12.87%;female weekly MRD=11.64%,BRD=9.01%;female weekdays MRD=12.02%,BRD=9.23%,P<0.05).Replacing sedentary behavior(SB)with 10 minutes of LPA could reduce fat proportion[male:weekly-0.15(-0.26-0.04),weekdays-0.12(-0.22-0.02);female:weekly-0.18(-0.27-0.08),weekdays-0.16(-0.25-0.07)]and increase muscle proportion[male:weekly 0.14(0.03-0.24),weekdays 0.11(0.02-0.21);female:weekly 0.17(0.07-0.26),weekdays 0.15(0.07-0.24)].Conclusion Interrupting continuous SB with LPA can serve as an intervention measure to promote physical health and fitness in adolescents.School should encourage students to engage in frequent LPA during breaks and after-school activities,while avoiding prolonged SB.

关 键 词：运动活动 久坐生活方式 身体成分 回归分析 青少年 

分 类 号：G806[文化科学—运动人体科学] G804.49[文化科学—体育学] G478