Physiological responses during simulated 16 km recumbent handcycling time trial and determinants of performance in trained handcyclists

Autor: Benjamin Stone, Barry S. Mason, Vicky L. Goosey-Tolfrey, Ben T. Stephenson
Rok vydání: 2020
Předmět:
Zdroj: European Journal of Applied Physiology
ISSN: 1439-6327
1439-6319
DOI: 10.1007/s00421-020-04390-w
Popis: Purpose To characterise the physiological profiles of trained handcyclists, during recumbent handcycling, to describe the physiological responses during a 16 km time trial (TT) and to identify the determinants of this TT performance. Methods Eleven male handcyclists performed a sub-maximal and maximal incremental exercise test in their recumbent handbike, attached to a Cyclus II ergometer. A physiological profile, including peak aerobic power output (POPeak), peak rate of oxygen uptake ($$\dot{V}$$V˙O2Peak), aerobic lactate threshold (AeLT) and PO at 4 mmol L−1 (PO4), were determined. Participants also completed a 16 km simulated TT using the same experimental set-up. Determinants of TT performance were identified using stepwise multiple linear regression analysis. Results Mean values of POPeak = 252 ± 9 W, $$\dot{V}$$V˙O2Peak = 3.30 ± 0.36 L min−1 (47.0 ± 6.8 mL kg−1 min−1), AeLT = 87 ± 13 W and PO4 = 154 ± 14 W were recorded. The TT was completed in 29:21 ± 0:59 min:s at an intensity equivalent to 69 ± 4% POPeak and 87 ± 5% $$\dot{V}$$V˙O2Peak. POPeak (r = − 0.77, P = 0.006), PO4 (r = − 0.77, P = 0.006) and AeLT (r = − 0.68, P = 0.022) were significantly correlated with TT performance. PO4 and POPeak were identified as the best predictors of TT performance (r = 0.89, P Conclusion POPeak, PO4 and AeLT are important physiological TT performance determinants in trained handcyclists, differentiating between superior and inferior performance, whereas $$\dot{V}$$V˙O2peak was not. The TT took place at an intensity corresponding to 69% POPeak and 87% $$\dot{V}$$V˙O2peak.
Databáze: OpenAIRE
Externí odkaz: