Davies C T, Young K
Acta Paediatr Scand. 1985 Sep;74(5):760-4. doi: 10.1111/j.1651-2227.1985.tb10027.x.
Short-term power output in jumping and cycling has been measured in 56 children aged 11 and 14 years. The results showed that the peak power output in cycling (Wb) and jumping (Wp) were closely associated (r = 0.91) but in absolute terms Wb was approximately 34% greater than Wb. There were no significant differences in Wb (or Wp) between the 11-year-old boys and girls, but the 14-year-old boys recorded approximately 25% higher power output values in cycling and jumping than girls of the same age and were approximately twice as powerful as their younger male counterparts. The velocity of movement in cycling (Vb) and jumping (VT) for a given age were identical and independent of sex in the younger children. Peak power output in cycling was reached when force and velocity were equivalent to 50% of their calculated maximal values. When Wb and Wp were related to an anthropometric estimate of leg muscle (plus bone) volume the difference in absolute power output between the children disappeared. The results suggest that the difference between Wp and Wb and the increase in absolute mechanical power output with age is mainly a function of size and the force which can be exerted at the optimal frequency of movement in children.
对56名11岁和14岁的儿童进行了跳跃和骑自行车时的短期功率输出测量。结果表明，骑自行车（Wb）和跳跃（Wp）时的峰值功率输出密切相关（r = 0.91），但绝对而言，Wb比Wp大约大34%。11岁的男孩和女孩在Wb（或Wp）方面没有显著差异，但14岁的男孩在骑自行车和跳跃时的功率输出值比同龄女孩高约25%，且其功率约为 younger male counterparts的两倍。在较年幼的儿童中，给定年龄下骑自行车（Vb）和跳跃（VT）的运动速度相同，且与性别无关。当力和速度相当于其计算最大值的50%时，达到骑自行车时的峰值功率输出。当Wb和Wp与腿部肌肉（加上骨骼）体积的人体测量估计值相关时，儿童之间绝对功率输出的差异消失。结果表明，Wp和Wb之间的差异以及绝对机械功率输出随年龄的增加主要是儿童体型和在最佳运动频率下能够施加的力的函数。
