Makrides L, Heigenhauser G J, McCartney N, Jones N L
Clin Sci (Lond). 1985 Aug;69(2):197-205. doi: 10.1042/cs0690197.
Fifty males and 50 females, 15-71 years of age, exercised maximally for 30 s on an isokinetic ergometer at a pedalling frequency of 60 rev./min. Results were compared with maximal oxygen uptake (VO2 max.) obtained in a progressive incremental exercise test. Total work in 30 s was higher in males than females, declined linearly by about 6% per decade of age (r = -0.65), and was related closely to height (r = 0.75) and to lean thigh volume estimated anthropometrically (r = 0.84). A close association with vital capacity (r = 0.86) was also found that accounted statistically for the combined effects of age and height. The percentage decline in power during 30 s (fatigue index) was lower in subjects reporting greater leisure activity. A close relationship was found between total work in 30 s and VO2max. (r = 0.86), with vital capacity and leisure activity exerting additional influences on VO2max. (P less than 0.001; multiple r = 0.93). The well-established reduction with age in VO2max. is associated with an apparent parallel reduction in the power output capacity of large muscle groups recruited in heavy dynamic leg exercise.
50名男性和50名女性，年龄在15至71岁之间，在等动测力计上以每分钟60转的蹬踏频率进行了30秒的最大运动。将结果与在递增运动试验中获得的最大摄氧量（VO2 max.）进行比较。男性在30秒内的总功高于女性，每增加十岁总功线性下降约6%（r = -0.65），并且与身高密切相关（r = 0.75），与通过人体测量估算的大腿瘦体积也密切相关（r = 0.84）。还发现与肺活量密切相关（r = 0.86），这在统计学上解释了年龄和身高的综合影响。报告休闲活动较多的受试者在30秒内功率下降的百分比（疲劳指数）较低。发现30秒内的总功与VO2max之间存在密切关系（r = 0.86），肺活量和休闲活动对VO2max有额外影响（P小于0.001；复相关系数r = 0.93）。VO2max随年龄增长而降低这一已确定的现象与在剧烈动态腿部运动中募集的大肌肉群的功率输出能力明显平行下降有关。
