Miller J F, Stamford B A
J Appl Physiol (1985). 1987 Apr;62(4):1497-501. doi: 10.1152/jappl.1987.62.4.1497.
The energy cost and intensity of exercise performed at 0% grade were determined for walking at 2, 3, and 4 mph, running at 5, 6, and 7 mph, and walking at 2, 3, and 4 mph with ankle and/or hand weights. Subjects were young moderately trained males (4) and females (3). The energy cost per kilogram of body weight was similar between sexes, and data were combined for among-treatment comparisons. Intensity of effort and energy cost per minute and per mile were increased when weight was added during walking and were increased more with hand weights compared with ankle weights regardless of speed. The average increase in O2 uptake (ml X kg-1 X min-1 X 100 g-1 of added wt) was 0.8% for ankle, 1.3% for hand, and 0.9% for ankle and hand weights. Gross energy cost per mile during weighted walking (120-158 kcal/mile) was comparable to and in some cases exceeded that of running which was independent of speed (120-130 kcal/mile). During nonweighted walking, the energy cost (kcal/mile) was significantly greater at 4 mph compared with 2 and 3 mph which did not differ. The intensity of walking at 4 mph with ankle and hand weights was comparable to running at 5 mph.
确定了在坡度为0%时，以每小时2、3和4英里的速度行走、每小时5、6和7英里的速度跑步以及佩戴脚踝和/或手部负重以每小时2、3和4英里的速度行走时的运动能量消耗和强度。受试者为年轻的中度训练男性（4名）和女性（3名）。每千克体重的能量消耗在性别之间相似，因此将数据合并用于治疗间比较。行走时增加负重会使努力强度以及每分钟和每英里的能量消耗增加，并且无论速度如何，与脚踝负重相比，手部负重时增加得更多。添加负重时，氧气摄取量平均增加（每增加100克体重，氧气摄取量增加毫升×千克⁻¹×分钟⁻¹），脚踝负重时为0.8%，手部负重时为1.3%，脚踝和手部同时负重时为0.9%。负重行走时每英里的总能量消耗（120 - 158千卡/英里）与跑步相当，在某些情况下超过跑步，跑步的能量消耗与速度无关（120 - 130千卡/英里）。在无负重行走时，每小时4英里的能量消耗（千卡/英里）显著高于每小时2和3英里，后两者之间没有差异。佩戴脚踝和手部负重以每小时4英里的速度行走的强度与以每小时5英里的速度跑步相当。
