TIME-OF-DAY EFFECTS ON FATIGUE DURING A SUSTAINED ANAEROBIC TEST IN WELL-TRAINED CYCLISTS
TIME-OF-DAY EFFECTS ON FATIGUE DURING A SUSTAINED ANAEROBIC TEST IN WELL-TRAINED CYCLISTS
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DOI：
10.3109/07420520903534492
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发表时间：
2009-01-01
影响因子：
2.8
通讯作者：
Davenne, Damien
中科院分区：
文献类型：
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作者：
Lericollais, Romain;Gauthier, Antoine;Davenne, Damien
本研究的目的是评估持续无氧自行车运动中疲劳的时间效应。对16名健康男子自行车运动员进行了60 s Wingate试验，制动负荷为0.087 kg。kg体重（-1），在两个实验阶段，这是建立在06：00或18：00 h的平衡顺序。每天只有一次治疗，两次治疗之间的恢复期至少为36 h。每名受试者都接受了进行测试的培训。用于确定制动负荷的身体质量是每个受试者的第一个测试阶段的身体质量，并且在两个测试期间保持恒定。在测试期间，峰值功率（PP）、在测试的前30 s期间的平均功率（MP30 s）和整个60 s期间的平均功率（MP 60 s）以及疲劳（即，在整个锻炼过程中功率输出值的降低）进行了分析。结果证实了无氧功率输出存在昼夜变化。PP、MP30 s和MP 60 s在18：00时显著高于06：00时，增益分别等于8.2%、7.8%和7.8%。此外，在晚上记录的所有功率输出值均高于早上记录的值，表明这种运动引起的疲劳不受男性竞技自行车运动员的时间影响。据推测，自由和复杂的踏板可以允许适应运动模式，作为一个功能的一天，以保持较高的性能在晚上。从实践的角度考虑，进行一项运动所需的动作越复杂，受训练的运动员就越能考虑和适应一天中的时间效应，特别是在游泳、跑步、划船和皮划艇等循环运动项目中。（作者通讯：damien. unicaen.fr）
The aim of this study was to evaluate time-of-day effects on fatigue during a sustained anaerobic cycling exercise. Sixteen healthy male competitive cyclists were asked to perform a 60 s Wingate test against a braking load of 0.087 kg. kg body mass(-1) during two experimental sessions, which were set up either at 06: 00 or 18: 00 h in counterbalanced order. There was only one session per day with a recovery period of at least 36 h between the two sessions. Each subject was trained to perform the test. The body mass used to determine the braking load was that of the first test session for each subject and remained constant throughout the two test periods. During the test, peak power (PP), mean power during the first 30 s (MP30 s) and the full 60 s of the test (MP60 s), and fatigue (i.e., the decrease in power output values throughout the exercise) were analyzed. Results confirmed the existence of diurnal variation in anaerobic power output. PP, MP30 s, and MP60 s were significantly higher at 18: 00 than 06: 00 h, with gains equal to 8.2, 7.8, and 7.8%, respectively. Moreover, all the power output values recorded in the evening were higher than those recorded in the morning, indicating that fatigue induced by this exercise is not affected by time-of-day in male competitive cyclists. It is hypothesized that the freedom and complexity of pedalling could allow adaptations in movement patterns, as a function of time-of-day, in order to maintain higher performance in the evening. For practical considerations, the more complex the movements required to perform a sport, the more the time-of-day effect can be taken into account and adapted to by the trained athlete, particularly in cyclic sporting disciplines such as swimming, running, rowing, and kayaking. (Author correspondence: damien.davenne@unicaen.fr)