Blessey R L, Hislop H J, Waters R L, Antonelli D
Phys Ther. 1976 Sep;56(9):1019-24. doi: 10.1093/ptj/56.9.1019.
Physiologic factors of metabolic energy cost as well as selected mechanical characteristics of gait are described in a group of 40 presumably normal men and women between the ages of 20 and 60 years. Special emphasis was placed on unrestrained (free cadence) walking to provide a reliable baseline for comparison to persons with physical gait impairments. Velocity of walking was the most important factor in determining oxygen uptake and was independent of age or sex. An empirical equation was established relating oxygen uptake to the speed of walking. The average velocity for men in unrestrained walking trials was 89 meters per minute; for women 74 meters per minute. These differences were related to the greater stride length in men. The average cadence selected by both sexes was 116 steps per minute. None of these factors was age dependent. Of the physiologic measures only systolic blood pressure was age dependent predictably rising with age. The mean heart rate was 103 beats per minute and did not vary significantly between men and women. The mean respiratory rate was 19 per minute; the mean respiratory quotient, 0.85, neither being age or sex dependent. Oxygen uptake values averaged 12.95 ml/kg-min for the population studied and again were neither age nor sex dependent.
在一组40名年龄在20至60岁之间的健康男女中，描述了代谢能量消耗的生理因素以及选定的步态力学特征。特别强调了无约束（自由步频）行走，以便为与有身体步态障碍的人进行比较提供可靠的基线。步行速度是决定摄氧量的最重要因素，且与年龄或性别无关。建立了一个将摄氧量与步行速度相关联的经验方程。在无约束步行试验中，男性的平均速度为每分钟89米；女性为每分钟74米。这些差异与男性更大的步幅有关。两性选择的平均步频为每分钟116步。这些因素均与年龄无关。在生理指标中，只有收缩压与年龄有关，且可预测地随年龄增长而升高。平均心率为每分钟103次，男女之间无显著差异。平均呼吸频率为每分钟19次；平均呼吸商为0.85，均与年龄或性别无关。所研究人群的摄氧量平均为12.95毫升/千克·分钟，同样与年龄和性别无关。
