Peter Harrison Centre for Disability Sport, School of Sport, Exercise and Health Sciences, Loughborough University, NCSEM 1.26, Loughborough University Campus, Loughborough, LE11 3TU, UK.
English Institute of Sport, Performance Centre, Loughborough University, Loughborough, UK.
Eur J Appl Physiol. 2020 Jul;120(7):1621-1628. doi: 10.1007/s00421-020-04390-w. Epub 2020 May 20.
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.
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 (PO), peak rate of oxygen uptake ([Formula: see text]O), aerobic lactate threshold (AeLT) and PO at 4 mmol L (PO), 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.
Mean values of PO = 252 ± 9 W, [Formula: see text]O = 3.30 ± 0.36 L min (47.0 ± 6.8 mL kg min), AeLT = 87 ± 13 W and PO = 154 ± 14 W were recorded. The TT was completed in 29:21 ± 0:59 min:s at an intensity equivalent to 69 ± 4% PO and 87 ± 5% [Formula: see text]O. PO (r = - 0.77, P = 0.006), PO (r = - 0.77, P = 0.006) and AeLT (r = - 0.68, P = 0.022) were significantly correlated with TT performance. PO and PO were identified as the best predictors of TT performance (r = 0.89, P < 0.001).
PO, PO and AeLT are important physiological TT performance determinants in trained handcyclists, differentiating between superior and inferior performance, whereas [Formula: see text]O was not. The TT took place at an intensity corresponding to 69% PO and 87% [Formula: see text]O.
描述训练有素的手摇自行车运动员在卧姿手摇自行车运动中的生理特征，描述 16 公里计时赛 (TT) 期间的生理反应，并确定 TT 表现的决定因素。
11 名男性手摇自行车运动员在他们的卧姿手摇自行车上进行了亚最大和最大递增运动测试，该自行车连接到 Cyclus II 测力计上。确定了包括峰值有氧功率输出 (PO)、峰值摄氧量 ([Formula: see text]O)、有氧乳酸阈 (AeLT) 和 4 mmol L (PO) 时的 PO 在内的生理特征。参与者还使用相同的实验设置完成了 16 公里模拟 TT。使用逐步多元线性回归分析确定 TT 表现的决定因素。
记录的 PO 平均值为 252 ± 9 W、[Formula: see text]O 为 3.30 ± 0.36 L min（47.0 ± 6.8 mL kg min）、AeLT 为 87 ± 13 W 和 PO 为 154 ± 14 W。TT 在 29:21 ± 0:59 min:s 内完成，强度相当于 69 ± 4% PO 和 87 ± 5% [Formula: see text]O。PO（r = -0.77，P = 0.006）、PO（r = -0.77，P = 0.006）和 AeLT（r = -0.68，P = 0.022）与 TT 表现显着相关。PO 和 PO 被确定为 TT 表现的最佳预测因子（r = 0.89，P < 0.001）。
在训练有素的手摇自行车运动员中，PO、PO 和 AeLT 是 TT 表现的重要生理决定因素，可区分优秀和较差的表现，而 [Formula: see text]O 则不然。TT 发生在相当于 69% PO 和 87% [Formula: see text]O 的强度下。
