Ballor D L, Burke L M, Knudson D V, Olson J R, Montoye H J
Department of Physical Education, University of Wisconsin-Madison 53706.
Res Q Exerc Sport. 1989 Dec;60(4):362-8. doi: 10.1080/02701367.1989.10607464.
This study examined the accuracy of a new device (Caltrac) in estimating energy expenditure via acceleration measurements. Energy expenditure of 20 high school students during basketball class activity (average length = 37 min) was estimated using the Caltrac, heart rate recording, and video analysis. Heart rate recording and video analysis estimates of energy expenditure were determined from heart rate, caloric expenditure curves, and an activity rating scale, respectively. The following estimates of caloric expenditure (M +/- SD) were found: heart rate recording = 196 +/- 73 greater than Caltrac = 163 +/- 49 greater than film analysis = 123 +/- 30 kcal (p less than .05). Laboratory simulations of the basketball activity revealed that the Caltrac energy expenditure was not significantly different from the actual energy expenditure (p greater than .05). The heart rate recording and video analysis estimates of energy expenditure were significantly (p less than .05) higher and lower, respectively, than the actual energy expenditure. The Caltrac is a lightweight, low-cost device that provides a relatively accurate estimate of energy expenditure in free-ranging activities, such as basketball.
本研究检测了一种新设备（Caltrac）通过加速度测量来估算能量消耗的准确性。利用Caltrac、心率记录和视频分析对20名高中生在篮球课活动期间（平均时长 = 37分钟）的能量消耗进行了估算。心率记录和视频分析对能量消耗的估算分别根据心率、热量消耗曲线和活动评级量表来确定。得出了以下热量消耗估算值（M +/- SD）：心率记录 = 196 +/- 73千卡，高于Caltrac = 163 +/- 49千卡，高于影片分析 = 123 +/- 30千卡（p <.05）。篮球活动的实验室模拟显示，Caltrac的能量消耗与实际能量消耗无显著差异（p >.05）。心率记录和视频分析对能量消耗的估算分别显著高于（p <.05）和低于实际能量消耗。Caltrac是一种轻便、低成本的设备，能对诸如篮球等自由活动中的能量消耗提供相对准确的估算。
