Volianitis S, McConnell A K, Koutedakis Y, McNaughton L, Backx K, Jones D A
School of Sport and Exercise Sciences, The University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom.
Med Sci Sports Exerc. 2001 May;33(5):803-9. doi: 10.1097/00005768-200105000-00020.
To investigate the effects of a period of resistive inspiratory muscle training (IMT) upon rowing performance.
Performance was appraised in 14 female competitive rowers at the commencement and after 11 wk of inspiratory muscle training on a rowing ergometer by using a 6-min all-out effort and a 5000-m trial. IMT consisted of 30 inspiratory efforts twice daily. Each effort required the subject to inspire against a resistance equivalent to 50% peak inspiratory mouth pressure (PImax) by using an inspiratory muscle training device. Seven of the rowers, who formed the placebo group, used the same device but performed 60 breaths once daily with an inspiratory resistance equivalent to 15% PImax.
The inspiratory muscle strength of the training group increased by 44 +/- 25 cm H2O (45.3 +/- 29.7%) compared with only 6 +/- 11 cm H2O (5.3 +/- 9.8%) of the placebo group (P < 0.05 within and between groups). The distance covered in the 6-min all-out effort increased by 3.5 +/- 1.2% in the training group compared with 1.6 +/- 1.0% in the placebo group (P < 0.05). The time in the 5000-m trial decreased by 36 +/- 9 s (3.1 +/- 0.8%) in the training group compared with only 11 +/- 8 s (0.9 +/- 0.6%) in the placebo group (P < 0.05). Furthermore, the resistance of the training group to inspiratory muscle fatigue after the 6-min all-out effort was improved from an 11.2 +/- 4.3% deficit in PImax to only 3.0 +/- 1.6% (P < 0.05) pre- and post-intervention, respectively.
IMT improves rowing performance on the 6-min all-out effort and the 5000-m trial.
研究一段时间的阻力性吸气肌训练（IMT）对划船成绩的影响。
对14名女子竞技划船运动员在吸气肌训练开始时以及训练11周后，使用划船测力计进行6分钟全力划和5000米测试来评估成绩。IMT包括每天两次，每次30次吸气动作。每次动作要求受试者使用吸气肌训练装置，对抗相当于50%吸气峰口压（PImax）的阻力进行吸气。7名划船运动员组成安慰剂组，使用相同装置，但每天进行一次60次呼吸，吸气阻力相当于15%PImax。
训练组吸气肌力量增加了44±25厘米水柱（45.3±29.7%），而安慰剂组仅增加了6±11厘米水柱（5.3±9.8%）（组内和组间P<0.05）。训练组在6分钟全力划中划行的距离增加了3.5±1.2%，而安慰剂组增加了1.6±1.0%（P<0.05）。训练组在5000米测试中的用时减少了36±9秒（3.1±0.8%），而安慰剂组仅减少了11±8秒（0.9±0.6%）（P<0.05）。此外，训练组在6分钟全力划后对吸气肌疲劳的抵抗力从PImax下降11.2±4.3%改善到干预前后仅下降3.0±1.6%（P<0.05）。
IMT可提高6分钟全力划和5000米测试的划船成绩。
