Effect of high-intensity inspiratory muscle training on lung volumes, diaphragm thickness, and exercise capacity in subjects who are healthy
Effect of high-intensity inspiratory muscle training on lung volumes, diaphragm thickness, and exercise capacity in subjects who are healthy
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DOI：
10.1093/ptj/86.3.345
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发表时间：
2006-03-01
期刊：
影响因子：
3.2
通讯作者：
Davies, DH
中科院分区：
文献类型：
--
作者：
Enright, SJ;Unnithan, VB;Davies, DH
背景和目的。以前的研究表明，高强度吸气肌肉训练(IMT)方案导致慢性肺病患者的呼吸功能和运动能力的变化，尽管高强度吸气肌肉训练对健康受试者的影响尚不确定。因此，这项研究的目的是检查高强度IMT是否会导致健康受试者的呼吸功能和运动能力的变化。受试者。将20名受试者随机分为2组。方法：研究方法。训练组完成了为期8周的IMT计划，设定为最大努力的80%。对照组没有参加任何形式的训练。测定训练前和训练后的体成分、肺功能、吸气肌功能(包括最大和持续最大吸气压[MIP和SMIP])、松弛和收缩横隔膜厚度和增厚率(Tdi.rel、Tdi.cont和tr)以及运动能力。结果。与对照组相比，训练组的MIP、SMIP、Tdi.cont、TR、VC、总肺活量和运动能力显著增加，而8周时这些指标与基线测量结果无明显变化。讨论和结论。这项研究的结果表明，在健康的人中，高强度的IMT会导致收缩的横隔膜厚度增加，肺容量和运动能力增加。
Background and Purpose. Previous investigations have demonstrated that a regimen of high-intensity inspiratory muscle training (IMT) resulted in changes in ventilatory function and exercise capacity in patients with chronic lung disease, although the effect of high-intensity IMT in subjects who are healthy is yet to be determined. The purpose of this study, therefore, was to examine whether high-intensity IMT resulted in changes in ventilatory function and exercise capacity in subjects who were healthy. Subjects. Twenty subjects were randomly assigned to 2 groups. Methods. The training group completed an, 8-week program of IMT set at 80% of maximal effort. The control group did not participate in any form of training. Baseline and posttraining measures of body composition, pulmonary function, inspiratory muscle function (including maximal and sustained maximal inspiratory pressures [MIP and SMIP]), relaxed and contracted diaphragm thickness and thickening ratio (Tdi.rel, Tdi.cont, and TR), and exercise capacity were determined. Results. The training group demonstrated significant increases in MIP, SMIP, Tdi.cont, TR, VC, total lung capacity, and exercise capacity compared with the control group, which demonstrated no change from baseline measurements at 8 weeks. Discussion and Conclusion. The findings of this study suggest that high-intensity IMT results in increased contracted diaphragm thickness and increased lung volumes and exercise capacity in people who are healthy.