GT3X+ Accelerometer, Yamax Pedometer, and SC-StepMX Pedometer Step Count Accuracy in Community-Dwelling Older Adults

作者：Webber Sandra C^*; Magill Sheila M; Schafer Jenessa L; Wilson Kaylie C S

来源：Journal of Aging and Physical Activity, 2014, 22(3): 334-341.

DOI：10.1123/JAPA.2013-0002

• activity monitors
• locomotion
• physical activity
• walking

The purpose was to compare step count accuracy of an accelerometer (ActiGraph GT3X+), a mechanical pedometer (Yamax SW200), and a piezoelectric pedometer (SC-StepMX). Older adults (n = 13 with walking aids, n = 22 without; M = 81.5 years old, SD = 5.0) walked 100 m wearing the devices. Device-detected steps were compared with manually counted steps. We found no significant differences among monitors for those who walked without aids (p = .063). However, individuals who used walking aids exhibited slower gait speeds (M = 0.83 m/s, SD = 0.2) than non walking aid users (M = 1.21 m/s, SD = 0.2, p %26lt; .001), and for them the SC-StepMX demonstrated a significantly lower percentage of error (Mdn = 1.0, interquartile range [IQR] = 0.5-2.0) than the other devices (Yamax SW200, Mdn = 68.9, IQR = 35.9-89.3; left GT3X+, Mdn = 52.0, IQR = 37.1-58.9; right GT3X+, Mdn = 51.0, IQR = 32.3-66.5; p %26lt; .05). These results support using a piezoelectric pedometer for measuring steps in older adults who use walking aids and who walk slowly.

• 出版日期2014-7
• 单位Saskatoon; Saskatchewan