Lin Hua, Tong Tom Kwokkeung, Huang Chuanye, Nie Jinlei, Lu Kui, Quach Binh
Physical Education Department, Liaoning Normal University, Huanghe Road 850, Dalian, Liaoning, China.
Appl Physiol Nutr Metab. 2007 Dec;32(6):1082-8. doi: 10.1139/H07-077.
The effects of inspiratory muscle (IM) warm-up on IM function and on the maximum distance covered in a subsequent incremental badminton-footwork test (FWmax) were examined. Ten male badminton players were recruited to perform identical tests in three different trials in a random order. The control trial did not involve an IM warm-up, whereas the placebo and experimental trials did involve an IM warm-up consisting of two sets of 30-breath manoeuvres with an inspiratory pressure-threshold load equivalent to 15% (PLA) and 40% (IMW) maximum inspiratory mouth pressure, respectively. In the IMW trial, IM function was improved with 7.8%+/-4.0% and 6.9%+/-3.5% increases from control found in maximal inspiratory pressure at zero flow (P0) and maximal rate of P0 development (MRPD), respectively (p<0.05). FWmax was enhanced 6.8%+/-3.7%, whereas the slope of the linear relationship of the increase in the rating of perceived breathlessness for every minute (RPB/min) was reduced (p<0.05). Reduction in blood lactate ([La-]b) accumulation was observed when the test duration was identical to that of the control trial (P<0.05). In the PLA trial, no parameter was changed from control. For the changes (Delta) in parameters in IMW (n=10), negative correlations were found between DeltaP0 and DeltaRPB/min (r2=0.58), DeltaMRPD and DeltaRPB/min (r2=0.48), DeltaRPB/min, and DeltaFWmax (r2=0.55), but not between Delta[La-]b accumulation and DeltaFWmax. Such findings suggest that the IM-specific warm-up improved footwork performance in the subsequent maximum incremental badminton-footwork test. The improved footwork was partly attributable to the reduced breathless sensation resulting from the enhanced IM function, whereas the contribution of the concomitant reduction in [La-]b accumulation was relatively minor.
研究了吸气肌（IM）热身对IM功能以及随后的羽毛球步法递增测试中最大覆盖距离（FWmax）的影响。招募了10名男性羽毛球运动员，让他们以随机顺序在三种不同试验中进行相同测试。对照试验不进行IM热身，而安慰剂试验和试验性试验进行IM热身，包括两组30次呼吸动作，吸气压力阈值负荷分别相当于最大吸气口腔压力的15%（PLA）和40%（IMW）。在IMW试验中，零流量时的最大吸气压力（P0）和P0发展的最大速率（MRPD）相比对照分别提高了7.8%±4.0%和6.9%±3.5%，IM功能得到改善（p<0.05）。FWmax提高了6.8%±3.7%，而每分钟主观呼吸急促评分增加的线性关系斜率降低（p<0.05）当测试持续时间与对照试验相同时观察到血乳酸（[La-]b）积累减少（P<0.05）。在PLA试验中没有参数与对照相比发生变化。对于IMW中参数的变化（Delta）（n=10），发现DeltaP0与DeltaRPB/min（r2=0.58）、DeltaMRPD与DeltaRPB/min（r2=0.48）、DeltaRPB/min与DeltaFWmax（r2=0.55）之间存在负相关，但Delta[La-]b积累与DeltaFWmax之间不存在负相关。这些发现表明特定于IM的热身改善了随后的羽毛球最大递增步法测试中的步法表现。改善的步法部分归因于IM功能增强导致的呼吸急促感降低，而伴随的[La-]b积累减少的贡献相对较小。
