Graduate School of Sport and Exercise Sciences, Osaka University of Health and Sport Sciences, Kumatori 590-0496, Osaka, Japan.
Department of Health and Sport Sciences, Osaka University Graduate School of Medicine, Toyonaka 560-0043, Osaka, Japan.
Sensors (Basel). 2022 Mar 28;22(7):2577. doi: 10.3390/s22072577.
Sportswear-type wearables with integrated inertial sensors and electrocardiogram (ECG) electrodes have been commercially developed. We evaluated the feasibility of using a sportswear-type wearable with integrated inertial sensors and electrocardiogram (ECG) electrodes for evaluating exercise intensity within a controlled laboratory setting. Six male college athletes were asked to wear a sportswear-type wearable while performing a treadmill test that reached up to 20 km/h. The magnitude of the filtered tri-axial acceleration signal, recorded by the inertial sensor, was used to calculate the acceleration index. The R-R intervals of the ECG were used to determine heart rate; the external validity of the heart rate was then evaluated according to oxygen uptake, which is the gold standard for physiological exercise intensity. Single regression analysis between treadmill speed and the acceleration index in each participant showed that the slope of the regression line was significantly greater than zero with a high coefficient of determination (walking, 0.95; jogging, 0.96; running, 0.90). Another single regression analysis between heart rate and oxygen uptake showed that the slope of the regression line was significantly greater than zero, with a high coefficient of determination (0.96). Together, these results indicate that the sportswear-type wearable evaluated in this study is a feasible technology for evaluating physical and physiological exercise intensity across a wide range of physical activities and sport performances.
已商业化开发出具有集成惯性传感器和心电图 (ECG) 电极的运动型可穿戴设备。我们评估了在受控实验室环境中使用具有集成惯性传感器和心电图 (ECG) 电极的运动型可穿戴设备评估运动强度的可行性。要求六名男性大学生运动员在跑步机测试中佩戴运动型可穿戴设备，测试速度最高可达 20 公里/小时。惯性传感器记录的滤波三轴加速度信号的幅度用于计算加速度指数。心电图的 R-R 间隔用于确定心率；然后根据耗氧量评估心率的外部有效性，耗氧量是生理运动强度的金标准。每位参与者的跑步机速度与加速度指数之间的单回归分析表明，回归线的斜率明显大于零，决定系数较高（步行时为 0.95，慢跑时为 0.96，跑步时为 0.90）。另一个心率与耗氧量之间的单回归分析表明，回归线的斜率明显大于零，决定系数较高（0.96）。综上所述，这些结果表明，本研究中评估的运动型可穿戴设备是一种可行的技术，可在广泛的身体活动和运动表现范围内评估身体和生理运动强度。
