Acute Effect of Normobaric Hypoxia on Performance in Repeated Wingate Tests with Longer Recovery Periods and Neuromuscular Fatigue in Triathletes: Sex Differences.

IF 2.5 Q1 SPORT SCIENCES
Víctor Toro-Román, Pol Simón-Sánchez, Víctor Illera-Domínguez, Carla Pérez-Chirinos, Sara González-Millán, Lluís Albesa-Albiol, Sara Ledesma, Vinyet Solé, Oriol Teruel, Bruno Fernández-Valdés
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引用次数: 0

Abstract

Background: Repeated high-intensity intervals under normoxic (NOR) and hypoxic (HYP) conditions is a training strategy used by athletes. Although different protocols have been used, the effect of longer recovery between repetitions is unclear. In addition, information on the effect of repeated high-intensity intervals on HYP in women is scarce. Aims: To analyse the differences between sexes and between conditions (NOR and HYP) in Repeated Wingate (RW) performance and neuromuscular fatigue in triathletes. Methods: A total of 12 triathletes (men: n = 7, 23.00 ± 4.04 years; women: n = 5, 20.40 ± 3.91) participated in this randomised, blinded, crossover study. In two separate sessions over seven days, participants performed 3 × 30" all out with 7' of recovery in randomised NOR (fraction of inspired oxygen: ≈20%; ≈300 m altitude) and HYP (fraction of inspired oxygen: ≈15.5%; ≈2500 m altitude) conditions. Before and after RW, vertical jump tests were performed to assess neuromuscular fatigue. Oxygen saturation, power, perceived exertion, muscle soreness and heart rate parameters were assessed. Results: Significant differences were reported between sexes in the parameters of vertical jump, oxygen saturation, RW performance and heart rate (p < 0.05). However, between conditions (NOR and HYP), only differences in oxygen saturation were reported (p < 0.05). No significant differences were reported between conditions (NOR and HYP) in RW performance, neuromuscular fatigue, muscle soreness and perception of exertion. Conclusions: A 3 × 30" RW protocol with 7' recovery in HYP could have no negative consequences on performance, neuromuscular fatigue and perception of exertion in triathletes compared to NOR, independently of sex.

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常压缺氧对铁人三项运动员在较长恢复期和神经肌肉疲劳的重复温盖特测试中的表现的急性影响:性别差异。
背景:在常氧(NOR)和低氧(HYP)条件下重复高强度间歇训练是运动员使用的一种训练策略。虽然使用了不同的方案,但重复之间较长的恢复时间的影响尚不清楚。此外,关于重复高强度间隔对女性HYP的影响的信息很少。目的:分析铁人三项运动员重复Wingate (RW)运动表现和神经肌肉疲劳的性别差异及不同状态(NOR和HYP)的差异。方法:共有12名铁人三项运动员(男性:n = 7, 23.00±4.04岁;女性:n = 5, 20.40±3.91岁)参与了这项随机、盲法、交叉研究。在为期7天的两个单独的疗程中,参与者在随机的NOR(吸入氧的比例:≈20%;≈300米海拔)和HYP(吸入氧的比例:≈15.5%;≈2500米海拔)条件下进行3 × 30“全衰竭,恢复7”。在RW之前和之后,进行垂直跳跃测试来评估神经肌肉疲劳。评估氧饱和度、功率、感觉用力、肌肉酸痛和心率参数。结果:两性在垂直起跳、血氧饱和度、RW性能、心率等指标上存在显著差异(p < 0.05)。然而,在不同的条件下(NOR和HYP),仅报告了氧饱和度的差异(p < 0.05)。在RW表现、神经肌肉疲劳、肌肉酸痛和用力感觉方面,无显著差异(NOR和HYP)。结论:与NOR相比,3 × 30”RW方案与7’恢复对铁人三项运动员的表现、神经肌肉疲劳和运动感知没有负面影响,与性别无关。
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来源期刊
Journal of Functional Morphology and Kinesiology
Journal of Functional Morphology and Kinesiology Health Professions-Physical Therapy, Sports Therapy and Rehabilitation
CiteScore
4.20
自引率
0.00%
发文量
94
审稿时长
12 weeks
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