PDF(Pubmed)
Abstract：
Inspiratory muscle training (IMT) has been used in different sports, although there is no consensus on its benefits. We investigated the effects of eight weeks of IMT in women\'s handball. Twenty-four players were randomly distributed into experimental (EXP; n = 13) and control (CON; n = 11) groups. Only the EXP group performed IMT using the POWERBreathe device, following indications of the manufacturers. Before and after the intervention, spirometric variables were evaluated at rest and during a graded test using direct analysis of respiratory gases. Perception of exertion at submaximal intensity was also determined. No significant differences were observed post- vs. pre-intervention (p ≥ 0.05) regarding forced vital capacity (FVC), forced expiratory volume in the 1st second (VEF1), FVC/VEF1, maximal expiratory flow at 50% of FVC or peak inspiratory flow. Post-intervention, only the CON group increased their absolute and relative VO2max (2.1 ± 0.2 L/min pre vs. 2.2 ± 0.3 L/min post; 33.6 ± 3.6 ml/kg∙min pre vs. 34.5 ± 3.2 ml/kg∙min post, respectively). No significant improvements (p ≥ 0.05) were observed in VO2 associated with ventilatory threshold 1 (VT1), nor in the intensity associated with VO2max and VT1. However, there was a tendency for the mentioned variables to decrease in the CON group, while in the EXP group the trend was to maintain or increase previous values. IMT did not determine an improvement in the perception of exertion at submaximal intensity. The use of POWERBreathe, as described in the present study, is feasible in terms of time and effort, although its benefits may not be significant.
摘要：
吸气肌肉训练（IMT）已用于不同的运动，尽管对其好处没有共识。我们调查了8周IMT对女性手球的影响。24名选手随机分为实验组(EXP;n=13)和对照组(CON;n=11)。只有EXP组使用POWERBreathe设备执行IMT,以下是制造商的迹象。干预前后,在静息时和分级试验期间使用呼吸气体直接分析评估肺活量测定变量.还确定了亚最大强度下的运动感知。后与后没有观察到显著差异关于强迫肺活量(FVC)的干预前(p≥0.05)，第1秒用力呼气量(VEF1),FVC/VEF1,50%FVC时的最大呼气流量或峰值吸气流量。干预后，只有CON组增加了他们的绝对和相对VO2max(2.1±0.2L/minprevs.2.2±0.3L/minpost;33.6±3.6ml/kg·minprevs.34.5±3.2ml/kg·minpost,分别)。与通气阈值1（VT1）相关的VO2没有显着改善（p≥0.05），与VO2max和VT1相关的强度也没有。然而,在CON组中，上述变量有减少的趋势，而在EXP组中，趋势是维持或增加先前的值。IMT并未确定亚最大强度下的劳累感改善。权力呼吸的使用，如本研究中所述，在时间和努力方面是可行的，虽然它的好处可能并不显著。
