Laboratoire RELACS, Université du Littoral Côte d'Opale, Dunkerque.
J Sports Sci. 2010 Feb;28(4):381-7. doi: 10.1080/02640410903508821.
The aim of this study was to determine thresholds for various intensities of physical activity in children and adolescents using the RT3 accelerometer. Forty healthy participants aged 10-16 years were recruited to the study. To validate the RT3 accelerometer data, an independent sample of 20 children and adolescents aged 10-16 years performed the same activities. Accelerometer data, heart rate, and oxygen consumption were measured at nine levels of physical activity, which varied in intensity: sedentary, light, moderate, and vigorous. Age and sex did not affect thresholds. The activity categories and accelerometer counts were: sedentary activity, 0-40 counts x min(-1); light activity, 41-950 counts x min(-1); moderate activity, 951-3410 counts x min(-1); and vigorous activity, >3410 counts x min(-1), respectively. These thresholds were considered valid as the difference between threshold values obtained using two independent groups of children was not significant. This study has established threshold values for various physical activities and enables the RT3 accelerometer to be used to quantify the duration of various levels of activity in adolescents under free-living conditions.
本研究旨在使用 RT3 加速度计确定儿童和青少年各种强度体力活动的阈值。招募了 40 名年龄在 10-16 岁的健康参与者。为了验证 RT3 加速度计数据，一组 20 名年龄在 10-16 岁的儿童和青少年进行了相同的活动。在九个不同强度的体力活动水平下测量了加速度计数据、心率和耗氧量，这些强度水平分别为：久坐、轻、中、剧烈。年龄和性别不影响阈值。活动类别和加速度计计数分别为：久坐活动，0-40 计数 x 分钟(-1)；轻活动，41-950 计数 x 分钟(-1)；中强度活动，951-3410 计数 x 分钟(-1)；剧烈活动，>3410 计数 x 分钟(-1)。这些阈值被认为是有效的，因为使用两个独立的儿童组获得的阈值值之间没有显著差异。本研究已经确定了各种体力活动的阈值值，使 RT3 加速度计能够在自由生活条件下量化青少年各种活动水平的持续时间。
