Human Performance Laboratory, School of Kinesiology, University of Zagreb, Zagreb, Croatia.
J Strength Cond Res. 2011 Feb;25(2):360-6. doi: 10.1519/JSC.0b013e3181bf01f7.
The purpose of this study was to assess the relationship between heart rate deflection point (HRDP) and ventilatory threshold (VT) to the physiological and performance variables in a relatively large group of trained men rowers. We proposed the hypothesis that physiological and performance variables corresponding to HRDP are not significantly different from corresponding variables at VT, which would justify the use of HRDP as a simple, affordable, and noninvasive method of anaerobic threshold assessment in trained rowers. Eighty-nine trained men rowers (mean ± SD: age 21.2 ± 4.1 years; stature 1.89 ± 0.06 m; body mass 89.2 ± 8.4 kg; VO₂max [maximum oxygen uptake] 5.39 ± 0.62 L/min⁻¹) completed an incremental rowing ergometer exercise test to exhaustion. Three independent, experienced observers determined both HRDP and VT. HRDP was determined by visual and computer-aided regression analyses and was evident in all rowers. The main findings include (a) there is a strong relationship among all observed physiological and performance variables corresponding to HR(HRDP) and HR(VT) (r = 0.79-0.96; p < 0.001) and (b) power output, oxygen uptake, ventilation, tidal volume and breathing rate corresponding to HR(HRDP) and HR(VT) were not significantly different (p ≥ 0.011), whereas HR(HRDP) was slightly but significantly higher than HR(VT) (174.5 vs. 172.8 beats·min⁻¹; p = 0.003). The standard error of the estimate in predicting the HR(VT) based on HR(HRDP) was 5.1 beats·min⁻¹. The subsequent data suggest that, in general, trained rowers may be able to periodically assess their aerobic endurance and evaluate the effects of training programs using the HRDP method.
本研究旨在评估心率拐点（HRDP）与通气阈（VT）与生理和运动表现变量之间的关系，该研究纳入了相当数量的有训练的男子赛艇运动员。我们提出假设，即 HRDP 对应的生理和运动表现变量与 VT 对应的变量没有显著差异，这将证明 HRDP 可作为一种简单、经济且非侵入性的评估训练有素的赛艇运动员无氧阈的方法。89 名有训练的男子赛艇运动员（平均±标准差：年龄 21.2±4.1 岁；身高 1.89±0.06m；体重 89.2±8.4kg；最大摄氧量[最大耗氧量]5.39±0.62L/min⁻¹）完成了递增式划船测功仪运动测试直至力竭。三名独立的、有经验的观察者确定了 HRDP 和 VT。HRDP 通过视觉和计算机辅助回归分析确定，所有赛艇运动员都存在 HRDP。主要发现包括：（a）所有观察到的 HR（HRDP）和 HR（VT）对应的生理和运动表现变量之间存在很强的关系（r=0.79-0.96；p<0.001）；（b）与 HR（HRDP）和 HR（VT）对应的功率输出、耗氧量、通气量、潮气量和呼吸频率没有显著差异（p≥0.011），但 HR（HRDP）略高于 HR（VT）（174.5 比 172.8 次·min⁻¹；p=0.003）。基于 HR（HRDP）预测 HR（VT）的估计标准误差为 5.1 次·min⁻¹。后续数据表明，一般来说，训练有素的赛艇运动员可能能够定期评估他们的有氧耐力，并使用 HRDP 方法评估训练计划的效果。
