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目的验证RT3三轴加速度传感器和Actigraph单轴加速度传感器测量不同速度步行或跑步时能量消耗的精确度。方法受试对象为南京体育学院大学生20名,男女各10名。受试者同时佩戴RT3加速度传感器和Acti-graph加速度传感器在跑台上分别以3.2 km/h、4.8 km/h、6.4 km/h、8.1 km/h、9.7 km/h的速度完成800 m步行或跑步。以间接测热法测量不同速度步行或跑步时的实际能量消耗。结果 5种速度步行或跑步时,当速度为3.2km/h、4.8 km/h、6.4 km/h时,RT3三轴加速度传感器能够相对准确测量能量消耗,而当速度为8.1 km/h、9.7 km/h时,该传感器测量能耗值与实际能耗值比较,差异具有显著性,因而不能准确测量这两种速度时的能量消耗;当速度为3.2 km/h、4.8 km/h、6.4 km/h时,Actigraph加速度传感器测量能耗值与实际能耗值比较,差异具有显著性,因而不能准确测量这三种速度时的能量消耗。结论无论在何种运动速度下,RT3测量能耗值均高于实际能耗值,其较适合于测量步行等中低速度体力活动的能量消耗;Actigraph测量能耗值均低于实际能耗值,其较适合于测量跑步等较快速度体力活动的能量消耗。
Purpose To verify the accuracy of energy consumption when measuring RT3 triaxial accelerometer and Actigraph single axis accelerometer for walking or running at different speeds. Methods Subjects for the Nanjing Institute of Physical Education 20 students, 10 men and women. Subjects wearing both the RT3 accelerometer and the Acti-graph accelerometer completed 800 m walking on the treadmill at speeds of 3.2 km / h, 4.8 km / h, 6.4 km / h, 8.1 km / h and 9.7 km / h, respectively Or running. Measuring the actual energy consumption of walking or running at different speeds with indirect calorimetry. Results The RT3 triaxial accelerometer was able to measure the energy consumption relatively accurately at speeds of 3.2 km / h, 4.8 km / h and 6.4 km / h at 5 speeds of walking or running. At speeds of 8.1 km / h and 9.7 km / h, the energy consumption of the sensor measured compared with the actual energy consumption, the difference was significant, and therefore can not accurately measure the energy consumption of these two speeds; when the speed of 3.2 km / h, 4.8 km / h, 6.4 km / h, Actigraph accelerometer measured energy consumption value compared with the actual energy consumption, the difference was significant and therefore can not accurately measure the energy consumption of these three speeds. Conclusion The energy consumption of RT3 is higher than the actual energy consumption at any speed, which is more suitable for measuring the energy consumption of mid-low-speed physical activity such as walking. The energy consumption of Actigraph is lower than the actual energy consumption , Which is more suitable for measuring energy consumption such as running faster physical activity.