ABSTRACT

This study aimed to determine the validity of the ActiGraph wGT3X-BT for step counts (SC) at five different body locations in laboratory settings. A total of 29 male adults participated in this study. The participants walked or ran for different speeds on the treadmill while wearing ActiGraph wGT3X-BT on their right wrist (RW), left wrist (LW), waist, right ankle (RA), and right upper arm (RUA). Both the video camera and each ActiGraph recorded SC simultaneously. The waist, RUA (6, 8, 10 km/hr and total), and RA (4 and 6 km/hr) showed small Mean Absolute Percentage Error (MAPE) values (<5%) and good agreement with Bland–Altman plots. However, the waist (2 and 4 km/hr), RUA (2 and 4 km/hr), RA (2, 8, 10 km/hr and total), RW, and LW showed high MAPE. In conclusion, the waist and RUA are valid for the total SC during walking and running in the laboratory setting.

摘要

本研究旨在确定 ActiGraph wGT3X-BT 在实验室环境中五个不同身体位置的步数 (SC) 的有效性。共有 29 名男性成年人参加了这项研究。参与者在右手腕 (RW)、左手腕 (LW)、腰部、右脚踝 (RA) 和右上臂 (RUA) 上佩戴 ActiGraph wGT3X-BT 在跑步机上以不同的速度行走或跑步。摄像机和每个 ActiGraph 同时记录 SC。腰围、RUA（6、8、10 公里/小时和总计）和 RA（4 和 6 公里/小时）显示出较小的平均绝对百分比误差 (MAPE) 值 (<5%)，并且与 Bland-Altman 图有很好的一致性. 然而，腰部（2 和 4 公里/小时）、RUA（2 和 4 公里/小时）、RA（2、8、10 公里/小时和总计）、RW 和 LW 显示出高 MAPE。综上所述，