The effects of a 10 km run and 30 km cycling time-trial on ventilatory threshold during the final running leg of an ITU Duathlon in highly-trained multi-sport athletes.

摘要

This study investigated the effects of a 10 km run and 30 km cycling time-trial on maximal oxygen uptake (VO2max) and ventilatory threshold (VT) during the subsequent run of an ITU Duathlon simulation. Highly-trained multi-sport subjects (n=6) completed three trials; Trial-1: a speed only VO 2max (SOVO2max) protocol to determine VO2max and VT during an single-bout run; Trial-2: a 10 km run at 95-98% of VT followed by a cycle ergometer VO2max test to determine VO2max and VT; Trial-3: a 10 km run and 30 km cycling time-trial, each performed at 95-98% of VT, followed by a SOVO 2max protocol to determine VO2max and VT. No significant difference in VO2max, (p=0.06, 66.8 mL/kg/min +/- 6.6 and 60.9 mL/kg/min +/- 3.1 respectively), or VT (%VO2max ) (p=0.36, 75.9% +/- 3.9 and 77.5% +/- 10.4, respectively) was observed. A decrease of 1.6 km/h was observed between trials; a 2 minute and 18 second increase in 5 km run time.