Trost Stewart G, Pate Russell R, Sallis James F, Freedson Patty S, Taylor Wendell C, Dowda Marsha, Sirard John
School of Human Movement Studies, University of Queensland, Brisbane, Australia.
Med Sci Sports Exerc. 2002 Feb;34(2):350-5. doi: 10.1097/00005768-200202000-00025.
The purpose of this study was to evaluate age and gender differences in objectively measured physical activity (PA) in a population-based sample of students in grades 1-12.
Participants (185 male, 190 female) wore a CSA 7164 accelerometer for 7 consecutive days. To examine age-related trends, students were grouped as follows: grades 1-3 (N = 90), grades 4-6 (N = 91), grades 7-9 (N = 96), and grades 10-12 (N = 92). Bouts of PA and minutes spent in moderate-to-vigorous PA (MVPA) and vigorous PA (VPA) were examined.
Daily MVPA and VPA exhibited a significant inverse relationship with grade level, with the largest differences occurring between grades 1-3 and 4-6. Boys were more active than girls; however, for overall PA, the magnitudes of the gender differences were modest. Participation in continuous 20-min bouts of PA was low to nonexistent.
Our results support the notion that PA declines rapidly during childhood and adolescence and that accelerometers are feasible alternatives to self-report methods in moderately sized population-level surveillance studies.
本研究旨在评估1至12年级学生的基于人群样本中，客观测量的身体活动（PA）的年龄和性别差异。
参与者（185名男性，190名女性）连续7天佩戴CSA 7164加速度计。为了研究与年龄相关的趋势，学生被分为以下几组：1至3年级（N = 90），4至6年级（N = 91），7至9年级（N = 96），以及10至12年级（N = 92）。对身体活动的次数以及中度至剧烈身体活动（MVPA）和剧烈身体活动（VPA）所花费的分钟数进行了检查。
每日MVPA和VPA与年级水平呈显著负相关，最大差异出现在1至3年级和4至6年级之间。男孩比女孩更活跃；然而，就总体身体活动而言，性别差异的幅度较小。参与持续20分钟的身体活动的情况很少或不存在。
我们的结果支持以下观点，即身体活动在儿童期和青少年期迅速下降，并且在中等规模的人群水平监测研究中，加速度计是自我报告方法的可行替代方案。
Zotero 插件