PDF(Pubmed)
Abstract：
Respiratory muscle training plays a significant role in reducing blood lactate concentration (bLa) and attenuating negative physiological stress reactions. Therefore, we investigated if voluntary isocapnic hyperpnoea (VIH) performed after a maximum anaerobic effort influences bLa and perceived fatigue level in well-trained speedskaters. 39 elite short-track speedskaters participated in a trial with two parallel groups: experimental and control. All the participants performed the Wingate Anaerobic Test (WAnT). The experimental group performed a VIH-based recovery protocol 20 min after exercise, the control group used passive recovery only. Blood samples were taken 3 and 30 min after the WAnT to measure bLa. Fatigue was self-appraised on a 0-10 perceived rating-of-fatigue (ROF) scale 3 and 30 min after the WAnT. Noteworthy, but not statistically significant changes between the experimental and control groups were observed for changes in bLa (p = 0.101). However, statistically significant changes between the groups were found for ROF (p = 0.003, ηp2 = 0.211, ω2 = 0.106). Moreover, statistically significant interactions between post-exercise bLa clearance and VO2max (p = 0.028) and inspiratory muscle strength (p = 0.040) were observed. Our findings provided preliminary insight that VIH may be an efficient recovery protocol after anaerobic exercise performed by elite athletes. The association between VO2max and post-exercise bLa clearance indicates the vital role of aerobic fitness in repeated-efforts ability in short-track speedskaters. The study was registered at ClinicalTrials.gov as NCT05994092 on 15th August 2023.
摘要：
呼吸肌训练在降低血乳酸浓度（bLa）和减轻负面生理应激反应中起着重要作用。因此,我们调查了在最大无氧努力后进行的自愿性等碳酸性呼吸过度（VIH）是否会影响训练有素的速滑运动员的bLa和感知的疲劳水平。39名精英短道速滑运动员参加了一项试验，分为两个平行组：实验组和对照组。所有参与者都进行了Wingate无氧测试（WAnT）。实验组在运动后20分钟执行基于VIH的恢复协议，对照组仅使用被动恢复。在WAnT后3和30分钟采集血样以测量bLa。在WAnT后3和30分钟，以0-10感知的疲劳等级（ROF）量表对疲劳进行自我评估。值得注意的是,但观察到实验组和对照组之间bLa的变化没有统计学上的显着变化（p=0.101）。然而,发现ROF在组间有统计学意义的变化(p=0.003,ηp2=0.211,ω2=0.106)。此外，观察到运动后bLa清除与VO2max（p=0.028）和吸气肌力（p=0.040）之间的统计学显着相互作用。我们的发现提供了初步见解，即VIH可能是精英运动员进行无氧运动后的有效恢复方案。VO2max与运动后bLa间隙之间的关联表明，有氧健身在短道速滑运动员的重复努力能力中至关重要。该研究于2023年8月15日在ClinicalTrials.gov注册为NCT05994092。
