Conger Scott A, Scott Stacy N, Fitzhugh Eugene C, Thompson Dixie L, Bassett David R
Dept of Kinesiology, Boise State University, Boise, ID.
J Phys Act Health. 2015 Nov;12(11):1520-6. doi: 10.1123/jpah.2014-0376. Epub 2015 Jan 30.
It is unknown if activity monitors can detect the increased energy expenditure (EE) of wheelchair propulsion at different speeds or on different surfaces.
Individuals who used manual wheelchairs (n = 14) performed 5 wheeling activities: on a level surface at 3 speeds, on a rubberized track at 1 fixed speed and on a sidewalk course at a self-selected speed. EE was measured using a portable indirect calorimetry system and estimated by an Actical (AC) worn on the wrist and a SenseWear (SW) activity monitor worn on the upper arm. Repeated- measures ANOVA was used to compare measured EE to the estimates from the standard AC prediction equation and SW using 2 different equations.
Repeated-measures ANOVA demonstrated a significant main effect between measured EE and estimated EE. There were no differences between the criterion method and the AC across the 5 activities. The SW overestimated EE when wheeling at 3 speeds on a level surface, and during sidewalk wheeling. The wheelchair-specific SW equation improved the EE prediction during low intensity activities, but error progressively increased during higher intensity activities.
During manual wheelchair propulsion, the wrist-mounted AC provided valid estimates of EE, whereas the SW tended to overestimate EE.
尚不清楚活动监测器能否检测出在不同速度或不同路面上轮椅推进时增加的能量消耗（EE）。
使用手动轮椅的个体（n = 14）进行5项轮椅活动：在水平路面上以3种速度行驶、在橡胶跑道上以1种固定速度行驶以及在人行道上以自选速度行驶。使用便携式间接量热系统测量EE，并通过佩戴在手腕上的Actical（AC）和佩戴在上臂的SenseWear（SW）活动监测器进行估计。采用重复测量方差分析，将测量的EE与标准AC预测方程和使用2种不同方程的SW的估计值进行比较。
重复测量方差分析显示，测量的EE与估计的EE之间存在显著的主效应。在这5项活动中，标准方法与AC之间没有差异。当在水平路面上以3种速度行驶以及在人行道上行驶时，SW高估了EE。特定于轮椅的SW方程在低强度活动期间改善了EE预测，但在高强度活动期间误差逐渐增加。
在手动轮椅推进过程中，佩戴在手腕上的AC提供了有效的EE估计值，而SW往往高估了EE。
