ABSTRACT

This study evaluated agreement in activity outcomes from ActiGraph accelerometers worn on both wrists in a laboratory and free-living setting. Part 1: Thirty-seven participants (25.5 ± 10.5 years) completed laboratory activities. Part 2: Thirty-nine participants (28.5 ± 9.8 years) wore accelerometers for 7 days. Outcomes included average acceleration and the intensity gradient (IG). Part 1: Average acceleration was equivalent at the group level between devices across all activity intensities. Wide limits of agreement ranging from 20.6% lower to 34.9% higher for the dominant wrist across all activities were observed. Part 2: The IG was equivalent between wrist locations, but average acceleration was approximately 8.5% higher when measured from the dominant wrist. Adjusting average acceleration values by −8.5% from the dominant wrist resulted in average acceleration falling within a strict 5% equivalence zone. Reducing average acceleration values from the dominant wrist by 8.5% results in equivalent outcomes between wrists during free-living.

摘要

这项研究评估了在实验室和自由生活环境中戴在两只手腕上的ActiGraph加速度计在活动结果方面的一致性。第1部分：37名参与者（25.5±10.5岁）完成了实验室活动。第2部分：三十九名参与者（28.5±9.8岁）佩戴了加速计7天。结果包括平均加速度和强度梯度（IG）。第1部分：在所有活动强度下，设备之间在组级别的平均加速度相等。在所有活动中，主要手腕的一致同意范围从低20.6％到高34.9％。第2部分：腕部位置之间的IG相当，但是从优势腕部测量，平均加速度大约高8.5％。将平均加速度值调整为-8。占优势的手腕5％导致平均加速度落在严格的5％当量区域内。将优势腕部的平均加速度值降低8.5％，可以在自由活动期间使腕部之间产生同等的效果。