Department of Exercise Science, Bloomsburg University, Bloomsburg, Pennsylvania, USA.
J Strength Cond Res. 2012 May;26(5):1413-22. doi: 10.1519/JSC.0b013e318248d7b4.
Recently, it was demonstrated that a uniaxial accelerometer worn at the hip could estimate resistance exercise energy expenditure. As resistance exercise takes place in more than 1 plane, the use of a triaxial accelerometer may be more effective in estimating resistance exercise energy expenditure. The aims of this study were to estimate the energy cost of resistance exercise using triaxial accelerometry and to determine the optimal location for wearing triaxial accelerometers during resistance exercise. Thirty subjects (15 men and 15 women; age = 21.7 ± 1.0 years) performed a resistance exercise protocol consisting of 2 sets of 8 exercises (10RM loads). During the resistance exercise protocol, subjects wore triaxial accelerometers on the wrist, waist, and ankle; a heart rate monitor; and a portable metabolic system. Net energy expenditure was significantly correlated with vertical (r = 0.67, p < 0.001), horizontal (r = 0.43, p = 0.02), third axis (r = 0.36, p = 0.048), and sum of 3 axes (r = 0.50, p = 0.005) counts at the waist, and horizontal counts at the wrist (r = -0.40, p = 0.03). Regression analysis using fat-free mass, sex, and the sum of accelerometer counts at the waist as variables was used to develop an equation that explained 73% of the variance of resistance exercise energy expenditure. A triaxial accelerometer worn at the waist can be used to estimate resistance exercise energy expenditure but appears to offer no benefit over uniaxial accelerometry. The use of accelerometers in estimating resistance exercise energy expenditure may prove useful for individuals and athletes who participate in resistance training and are focused on maintaining a tightly regulated energy balance.
最近，研究表明佩戴在臀部的单轴加速度计可估算抗阻运动的能量消耗。由于抗阻运动发生在超过 1 个平面，因此使用三轴加速度计可能更有效地估算抗阻运动的能量消耗。本研究的目的是使用三轴加速度计估算抗阻运动的能量消耗，并确定在抗阻运动期间佩戴三轴加速度计的最佳位置。30 名受试者（15 名男性和 15 名女性；年龄=21.7±1.0 岁）完成了一个抗阻运动方案，包括 2 组 8 个动作（10RM 负荷）。在抗阻运动方案中，受试者在手腕、腰部和脚踝佩戴三轴加速度计、心率监测器和便携式代谢系统。净能量消耗与垂直轴（r=0.67，p<0.001）、水平轴（r=0.43，p=0.02）、第三轴（r=0.36，p=0.048）和 3 个轴的总和（r=0.50，p=0.005）计数在腰部，以及手腕的水平计数（r=-0.40，p=0.03）呈显著相关。使用去脂体重、性别和腰部加速度计计数总和作为变量的回归分析用于开发一个解释 73%的抗阻运动能量消耗方差的方程。佩戴在腰部的三轴加速度计可用于估算抗阻运动的能量消耗，但似乎没有优于单轴加速度计。在估计抗阻运动能量消耗方面，使用加速度计可能对参加抗阻训练并专注于保持严格调节能量平衡的个体和运动员有用。
