Department of Natural Sciences in Kinanthropology, Faculty of Physical Culture, Palacký University Olomouc, Olomouc, Czech Republic.
Research Institute for Sport and Exercise (UCRISE), University of Canberra, Bruce, Australia.
PLoS One. 2022 Dec 20;17(12):e0279307. doi: 10.1371/journal.pone.0279307. eCollection 2022.
This study investigated the effects of acute, pre-exercise, hydrogen rich water (HRW) ingestion on running time to exhaustion at maximal aerobic speed in trained track and field runners.
Twenty-four, male runners aged 17.5 ± 1.8 years, with body mass index = 21.0 ± 1.3 kg⋅m-2, and maximal oxygen uptake = 55.0 ± 4.6 ml⋅kg-1⋅min-1 (mean ± standard deviation) participated in this randomized, double-blind, placebo-controlled crossover study. All runners ingested 1260 ml of HRW which was divided into four doses and taken at 120 min (420 ml), 60 min (420 ml), 30 min (210 ml), and 10 min (210 ml) prior to exercise. The running protocol consisted of three phases: warm-up performed at 10 km⋅h-1 for 3 min, followed by a transition phase performed at an individually determined speed (10 km⋅h-1 + maximal aerobic speed)/2 for 1 min, and finally the third phase performed at individual maximal aerobic speed until exhaustion. Time to exhaustion, cardiorespiratory variables, and post-exercise blood lactate concentration were measured.
When running to exhaustion at maximal aerobic speed, compared with placebo, HRW had no significant effects on the following variables: time to exhaustion (217 ± 49 and 227 ± 53 s, p = 0.20), post-exercise blood lactate concentration (9.9 ± 2.2 and 10.1 ± 2.0 mmol⋅L-1, p = 0.42), maximal heart rate (186 ± 9 and 186 ± 9 beats⋅min-1, p = 0.80), and oxygen uptake (53.1 ± 4.5 and 52.2 ± 4.7 ml⋅kg-1⋅min-1, p = 0.33). No variable assessed as a candidate moderator was significantly correlated with time to exhaustion (Spearman's correlation coefficients ranged from -0.28 to 0.30, all p ≥ 0.16).
Pre-exercise administration of 1260 ml of HRW showed no ergogenic effect on running performance to exhaustion at maximal aerobic speed in trained track and field runners.
本研究旨在探讨在训练有素的田径跑步运动员中，急性、运动前、富含氢气的水（HRW）摄入对最大有氧速度下的耐力跑时间的影响。
24 名年龄在 17.5±1.8 岁、体重指数为 21.0±1.3kg/m2、最大摄氧量为 55.0±4.6ml/kg-1.min-1（平均值±标准差）的男性跑步运动员参与了这项随机、双盲、安慰剂对照的交叉研究。所有运动员均摄入 1260ml 的 HRW，分为四剂，在运动前 120 分钟（420ml）、60 分钟（420ml）、30 分钟（210ml）和 10 分钟（210ml）时服用。跑步方案包括三个阶段：以 10km/h 的速度热身 3 分钟，然后以个体确定的速度（10km/h+最大有氧速度）/2进行过渡阶段 1 分钟，最后以个体最大有氧速度进行第三阶段，直至力竭。耐力跑时间、心肺变量和运动后血乳酸浓度被测量。
在以最大有氧速度进行耐力跑时，与安慰剂相比，HRW 对以下变量没有显著影响：耐力跑时间（217±49 和 227±53s，p=0.20）、运动后血乳酸浓度（9.9±2.2 和 10.1±2.0mmol/L，p=0.42）、最大心率（186±9 和 186±9 次/min，p=0.80）和摄氧量（53.1±4.5 和 52.2±4.7ml/kg-1.min-1，p=0.33）。没有一个被评估为候选调节剂的变量与耐力跑时间显著相关（Spearman 相关系数范围从-0.28 到 0.30，所有 p≥0.16）。
在训练有素的田径跑步运动员中，运动前摄入 1260ml 的 HRW 对最大有氧速度下的耐力跑时间没有表现出任何的增强作用。
