Effects of inspiratory muscle training on thoracoabdominal volume regulation in older adults: A randomised controlled trial

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-05-10 DOI:10.1016/j.resp.2024.104278

James Manifield, Charikleia Alexiou, Dimitrios Megaritis, Katherine Baker, Nicola Adams, Gill Barry, Ioannis Vogiatzis

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引用次数: 0

Abstract

Objectives

We investigated the effect of inspiratory muscle training (IMT) on inspiratory muscle strength, functional capacity and respiratory muscle kinematics during exercise in healthy older adults.

Methods

24 adults were randomised into an IMT or SHAM-IMT group. Both groups performed 30 breaths, twice daily, for 8 weeks, at intensities of ∼50 % maximal inspiratory pressure (PImax; IMT) or <15 % PImax (SHAM-IMT). Measurements of PImax, breathing discomfort during a bout of IMT, six-minute walk distance, physical activity levels, and balance were assessed pre- and post-intervention. Respiratory muscle kinematics were assessed via optoelectronic plethysmography (OEP) during constant work rate cycling.

Results

PImax was significantly improved (by 20.0±11.9 cmH₂O; p=0.001) in the IMT group only. Breathing discomfort ratings during IMT significantly decreased (from 3.5±0.9–1.7±0.8). Daily sedentary time was decreased (by 28.0±39.8 min; p=0.042), and reactive balance significantly improved (by 1.2±0.8; p<0.001) in the IMT group only. OEP measures showed a significantly greater contribution of the pulmonary and abdominal rib cage compartments to total tidal volume expansion post-IMT.

Conclusions

IMT significantly improves inspiratory muscle strength and breathing discomfort in this population. IMT induces greater rib cage expansion and diaphragm descent during exercise, thereby suggesting a less restrictive effect on thoracic expansion and increased diaphragmatic power generation.

查看原文本刊更多论文

吸气肌肉训练对老年人胸腹容量调节的影响：随机对照试验。

目的：我们研究了吸气肌训练（IMT）对健康老年人运动时吸气肌力量、功能能力和呼吸肌运动学的影响：我们研究了吸气肌训练（IMT）对健康老年人运动时吸气肌力量、功能能力和呼吸肌运动学的影响。方法：将 24 名成年人随机分为 IMT 组或 SHAM-IMT 组。两组均进行 30 次呼吸，每天两次，持续 8 周，强度为最大吸气压力（PImax；IMT）或结果的约 50%：仅 IMT 组的 PImax 有明显改善（20.0±11.9 cmH2O；P=0.001）。在 IMT 过程中，呼吸不适感评分明显降低（从 3.5±0.9 降至 1.7±0.8）。每日久坐时间减少（28.0±39.8 分钟；p=0.042），反应平衡显著改善（1.2±0.8；p结论：IMT能明显改善该人群的吸气肌力和呼吸不适感。在运动过程中，IMT 可诱导肋骨腔更大程度的扩张和膈肌下降，从而减少了对胸廓扩张的限制作用，并增加了膈肌的发电量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.