Sargeant A J, Dolan P
Department of Exercise Physiology and Health Science, Medical Faculty, University of Amsterdam, The Netherlands.
J Appl Physiol (1985). 1987 Oct;63(4):1475-80. doi: 10.1152/jappl.1987.63.4.1475.
The effect of prior exercise (PE) on subsequent maximal short-term power output (STPO) was examined during cycling exercise on an isokinetic ergometer. In the first series of experiments the duration of PE at a power output equivalent to 98% maximum O2 uptake (VO2max) was varied between 0.5 and 6 min before measurement of maximal STPO. As PE duration increased subsequent STPO fell to approximately 70% of control values after 3-6 min. In series ii the effect of varying the intensity of PE of fixed 6-min duration was studied in five subjects. After PE less than 60% VO2max there was an increase of 12% in STPO, but after greater than 60% VO2max there was a progressive fall in STPO as PE intensity increased, indicating a reduction of approximately 35% at 100% VO2max compared with control values. In series iii we examined the effect on STPO of allowing a recovery period after a fixed intensity (mean = 87% VO2max) of 6 min PE before measurement of STPO. This indicated a rapid recovery of dynamic function with a half time of approximately 32 s, which is similar to the kinetics of PC resynthesis and taken with the other findings suggests the dominant role that PC exerts on the STPO under these conditions.
在等动测力计上进行自行车运动期间，研究了先前运动（PE）对随后最大短期功率输出（STPO）的影响。在第一系列实验中，在测量最大STPO之前，将相当于最大摄氧量（VO2max）98%的功率输出下的PE持续时间在0.5至6分钟之间变化。随着PE持续时间增加，随后的STPO在3 - 6分钟后降至对照值的约70%。在第二系列实验中，研究了在五名受试者中改变固定6分钟持续时间的PE强度的影响。在PE小于60%VO2max后，STPO增加了12%，但在大于60%VO2max后，随着PE强度增加，STPO逐渐下降，表明在100%VO2max时与对照值相比降低了约35%。在第三系列实验中，我们在测量STPO之前，研究了在固定强度（平均 = 87%VO2max）的6分钟PE后给予恢复期对STPO的影响。这表明动态功能快速恢复，半衰期约为32秒，这与磷酸肌酸（PC）再合成的动力学相似，结合其他发现表明在这些条件下PC对STPO起主导作用。
