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Five repeated maximal efforts of apneas increase the time to exhaustion in subsequent high-intensity exercise
Respiratory Physiology & Neurobiology ( IF 2.3 ) Pub Date : 2021-06-01 , DOI: 10.1016/j.resp.2021.103703
Dimitrios I Bourdas 1 , Nickos D Geladas 1
Affiliation  

Ten subjects were tested on a cycle ergometer to exhaustion with intensity corresponding to 150 % of their peak power output (TF150) under three conditions [C: base line measurement; PRE: after five repeated breath hold maneuvers (BH); and POST: after 5BH, preceded by two weeks of BH training]. Respiratory and blood measurements were carried out. Upon cessation of 5BH, subjects compared to C condition started TF150 with reduced arterialized blood pH (C:7.428±0.023, PRE:7.419±0.016, POST:7.398±0.021) and elevated bicarbonate concentration (mmol/l), ventilation (l/min) and oxygen uptake (ml/min) (C:28.4±1.5, PRE:29.9±1.2, POST:30.0±1.8; C:10.4±2.5, PRE:13.3±3.3, POST:15.6±5.6; C:333.0±113.8, PRE:550.1±131.1, POST:585.1±192.8, respectively). After TF150, subjects had significantly reduced pH and elevated ventilation, and oxygen uptake in PRE and POST, in comparison to the C condition. TF150 (sec) significantly improved after 5BH without being further affected by BH training (C:44.8±8.1, PRE:49.2±4.8, POST:49.3±8.2). Priming breath holds prior to middle-distance racing may improve performance.



中文翻译:

呼吸暂停的五次重复最大努力增加了在随后的高强度运动中的力竭时间

在三种条件下,十名受试者在自行车测力计上以相当于其峰值功率输出 (TF150) 的 150% 的强度进行测试,直至筋疲力尽 [C:基线测量;PRE:经过五次重复屏气操作(BH);和 POST:5BH 之后,之前是两周的 BH 训练]。进行了呼吸和血液测量。在 5BH 停止后,与 C 条件相比,受试者开始 TF150,动脉化血液 pH 值降低(C:7.428±0.023,PRE:7.419±0.016,POST:7.398±0.021)和升高的碳酸氢盐浓度(mmol/l),通气(l/ min) 和摄氧量 (ml/min) (C:28.4±1.5, PRE:29.9±1.2, POST:30.0±1.8; C:10.4±2.5, PRE:13.3±3.3, POST:15.6±5.6; C:333.0 ±113.8,PRE:550.1±131.1,POST:585.1±192.8)。在 TF150 之后,受试者的 pH 值显着降低,通气量和摄氧量增加,PRE 和 POST,与 C 条件相比。TF150(秒)在 5BH 后显着改善,而不受 BH 训练的进一步影响(C:44.8±8.1,PRE:49.2±4.8,POST:49.3±8.2)。在中距离比赛之前屏住呼吸可能会提高性能。

更新日期:2021-06-04
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