- 期刊
三度空間加速規於跑步機行走之向量大小及能量消耗與耗氧量相關性研究
Correlation between Triaxial Accelerometer Measured Vector Magnitude/Energy Consumption and Oxygen Consumption during Treadmill Walking
摘要
Purpose: The research purpose is to investigate correlation between triaxial accelerometer measured vector magnitude, energy consumption and oxygen consumption during treadmill walking. Methods: Twenty young and apparently healthy subjects were recruited to participate in this study. All subjects randomly walked on treadmill under 9 conditions (speed 2, 3, 4 mph combined with slope 0%, 3.5% and 7 %). Each exercise lasted for 5 minutes and there were at least 5 minutes rest time in between. The triaxial accelerometer (RT3) and indirect calorimetry were used simultaneously. Results: Mean age of subjects is 23.5 ±2.3 years. RT3 energy consumption vs. indirect calorimetry and RT3 vector magnitude vs. indirect calorimetry are both highly correlated (r=0.8, p＜0.01, r=0.65, p＜0.01). Under 0%, 3.5%, 7% three different slopes, correlations between RT3 energy consumption and vector magnitude vs. indirect calorimetry are r=.94, .78, r=.95, .77 and r=.94, .76 (p all＜0.01). While under 2, 3, 4 mph three different speed, correlations between RT3 energy consumption and vector magnitude vs. indirect calorimetry are r=0.26 (p＜0.05), -0.42(p＜0.01), r=0.39 (p＜0.01). -0.27 (p＜0.05), r=0.41 (p＜0.01), -0.27 (p＜0.05). Conclusions: RT3 is significantly correlated with oxygen consumption in evaluating energy consumption during treadmill walking, although it is more sensitive to change of speed rather than change of slope and tend to overestimate energy consumption.
並列摘要
Purpose: The research purpose is to investigate correlation between triaxial accelerometer measured vector magnitude, energy consumption and oxygen consumption during treadmill walking. Methods: Twenty young and apparently healthy subjects were recruited to participate in this study. All subjects randomly walked on treadmill under 9 conditions (speed 2, 3, 4 mph combined with slope 0%, 3.5% and 7 %). Each exercise lasted for 5 minutes and there were at least 5 minutes rest time in between. The triaxial accelerometer (RT3) and indirect calorimetry were used simultaneously. Results: Mean age of subjects is 23.5 ±2.3 years. RT3 energy consumption vs. indirect calorimetry and RT3 vector magnitude vs. indirect calorimetry are both highly correlated (r=0.8, p＜0.01, r=0.65, p＜0.01). Under 0%, 3.5%, 7% three different slopes, correlations between RT3 energy consumption and vector magnitude vs. indirect calorimetry are r=.94, .78, r=.95, .77 and r=.94, .76 (p all＜0.01). While under 2, 3, 4 mph three different speed, correlations between RT3 energy consumption and vector magnitude vs. indirect calorimetry are r=0.26 (p＜0.05), -0.42(p＜0.01), r=0.39 (p＜0.01). -0.27 (p＜0.05), r=0.41 (p＜0.01), -0.27 (p＜0.05). Conclusions: RT3 is significantly correlated with oxygen consumption in evaluating energy consumption during treadmill walking, although it is more sensitive to change of speed rather than change of slope and tend to overestimate energy consumption.