Brønd Jan Christian, Grøntved Anders, Andersen Lars Bo, Arvidsson Daniel, Olesen Line Grønholt
Center for Research in Childhood Health/Unit for Exercise Epidemiology, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, 5000 Odense, Denmark.
Faculty of Teacher Education and Sport, Sogn og Fjordane University College, 6851 Sogndal, Norway.
Children (Basel). 2020 Jul 2;7(7):72. doi: 10.3390/children7070072.
The objective and accurate assessment of children's sedentary and physical behavior is important for investigating their relation to health. The purpose of this study is to validate a simple and robust method for the identification of sitting, standing, walking, running and biking performed by preschool children, children and adolescents in the age from 3 to 16 years from a single thigh-worn accelerometer. A total of 96 children were included in the study and all subjects followed a structured activity protocol performed in the subject's normal kindergarten or school environment. Thigh acceleration was measured using the Axivity AX3 (Axivity, Newcastle, UK) device. Method development and accuracy was evaluated by equally dividing the subjects into a development and test group. The sensitivity and specificity for identifying sitting and standing was above 99.3% and for walking and running above 82.6% for all age groups. The sensitivity and specificity for identifying biking was above 85.8% for children and adolescents and above 64.8% for the preschool group using running bikes. The accurate assessment of sitting, standing, walking, running and biking from thigh acceleration and with children in the age range of 3 to 16 is valid, although not with preschool children using running bikes.
客观准确地评估儿童的久坐行为和身体活动对于研究它们与健康之间的关系非常重要。本研究的目的是验证一种简单且可靠的方法，该方法可通过佩戴在单一大腿上的加速度计识别3至16岁学龄前儿童、儿童及青少年的坐、站、走、跑和骑自行车行为。共有96名儿童纳入本研究，所有受试者均遵循在其正常幼儿园或学校环境中执行的结构化活动方案。使用Axivity AX3（Axivity公司，英国纽卡斯尔）设备测量大腿加速度。通过将受试者平均分为开发组和测试组来评估方法的开发及准确性。所有年龄组识别坐和站的敏感性和特异性均高于99.3%，识别走和跑的敏感性和特异性均高于82.6%。对于儿童和青少年，识别骑自行车的敏感性和特异性高于85.8%，对于使用儿童自行车的学龄前儿童组，该敏感性和特异性高于64.8%。通过大腿加速度准确评估3至16岁儿童的坐、站、走、跑和骑自行车行为是有效的，不过对于使用儿童自行车的学龄前儿童无效。
