Life and Sports Science, University of Greenwich, Chatham Maritime, United Kingdom.
Department of Sports Studies, University of Winchester, United Kingdom.
Int J Sports Med. 2014 Apr;35(4):304-9. doi: 10.1055/s-0033-1349093. Epub 2013 Sep 10.
Recent datas suggest that the mean power over the final 30 s of a 3-min all-out test is equivalent to Critical Power (CP) using the linear ergometer mode. The purpose of the present study was to identify whether this is also true using an "isokinetic mode". 13 cyclists performed: 1) a ramp test; 2) three 3-min all-out trials to establish End Power (EP) and work done above EP (WEP); and 3) 3 constant work rate trials to determine CP and the work done above CP (W') using the work-time (=CP1/W'1) and 1/time (=CP2/W'2) models. Coefficient of variation in EP was 4.45% between trials 1 and 2, and 4.29% between trials 2 and 3. Limits of Agreement for trials 1-2 and trials 2-3 were -2±38 W. Significant differences were observed between EP and CP1 (+37 W, P<0.001), between WEP and W'1(-6.2 kJ, P=0.001), between EP and CP2 (+31 W, P<0.001) and between WEP and W'2 (-4.2 kJ, P=0.006). Average SEE values for EP-CP1 and EP-CP2 of 7.1% and 6.6% respectively were identified. Data suggest that using an isokinetic mode 3-min all-out test, while yielding a reliable measure of EP, does not provide a valid measure of CP.
最近的数据表明，在 3 分钟全力测试的最后 30 秒内的平均功率与使用线性测功仪模式的临界功率 (CP) 相当。本研究的目的是确定使用“等速模式”是否也是如此。13 名自行车运动员进行了以下测试：1）斜坡测试；2）三次 3 分钟全力测试，以确定最大功率 (EP) 和 EP 以上的功 (WEP)；3）3 次恒定工作速率测试，以确定 CP 和 CP 以上的功 (W')，使用工作时间 (=CP1/W'1)和 1/时间 (=CP2/W'2)模型。试验 1 和 2 之间 EP 的变异系数为 4.45%，试验 2 和 3 之间为 4.29%。试验 1-2 和试验 2-3 的一致性界限为-2±38 W。EP 和 CP1（+37 W，P<0.001）、WEP 和 W'1（-6.2 kJ，P=0.001）、EP 和 CP2（+31 W，P<0.001）以及 WEP 和 W'2（-4.2 kJ，P=0.006）之间存在显著差异。EP-CP1 和 EP-CP2 的平均 SEE 值分别为 7.1%和 6.6%。数据表明，使用等速模式的 3 分钟全力测试虽然能可靠地测量 EP，但不能提供 CP 的有效测量值。
