Rose J, Gamble J G, Lee J, Lee R, Haskell W L
Division of Orthopaedic Surgery, Stanford University Medical Center, California.
J Pediatr Orthop. 1991 Sep-Oct;11(5):571-8.
We used heart rate and walking speed to calculate an energy expenditure index (EEI), the ratio of heart rate per meter walked, for 102 normal subjects, age 6-18 years. Heart rate was measured at self-selected slow, comfortable, and fast walking speeds on the floor and on a motor-driven treadmill. At slow walking speeds (37 +/- 10 m/min) the EEI was elevated (0.71 +/- 0.32 beats/m), indicating poor economy. At comfortable speeds (70 +/- 11 m/min) the EEI values decreased to the maximum economy (0.47 +/- 0.13 beats/m). At fast speeds (101 +/- 13 m/min), the EEI increased (0.61 +/- 0.17 beats/m), indicating poor economy relative to comfortable speeds. A graph of the EEI versus walking speed provides a way to evaluate and compare energy expenditure in a clinical setting.
我们对102名6至18岁的正常受试者，使用心率和步行速度来计算能量消耗指数（EEI），即每行走一米的心率比值。在地面和电动跑步机上，以自我选择的慢、舒适和快步行速度测量心率。在慢步行速度（37±10米/分钟）时，EEI升高（0.71±0.32次/米），表明经济性较差。在舒适速度（70±11米/分钟）时，EEI值降至最大经济性（0.47±0.13次/米）。在快速度（101±13米/分钟）时，EEI增加（0.61±0.17次/米），表明相对于舒适速度经济性较差。EEI与步行速度的关系图提供了一种在临床环境中评估和比较能量消耗的方法。
