《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2022, Vol. 28 ›› Issue (9): 1022-1031.doi: 10.3969/j.issn.1006-9771.2022.09.004

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Effects of threshold inspiratory muscle training on respiratory function, motor function and quality of life for patients with chronic obstructive pulmonary disease: a meta-analysis

PENG Juan1,a2,WANG Jieping1,a2,HUANG Wei1b,FAN Bishuang1,a2,YU Jihua1,a2,ZENG Jin1,a2,HUANG Liheng1,a2,AN Lijuan1,a2,XU Fangyuan1,a2()   

  1. 1.a. Department of Rehabilitaion; b. Department of Endocrinology and Metabolism, the Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China
    2. Department of Rehabilitation Medicine, Southwest Medical University, Luzhou, Sichuan 646000, China
  • Received:2021-10-11 Revised:2022-04-28 Published:2022-09-25 Online:2022-10-08
  • Contact: XU Fangyuan E-mail:x5144@163.com
  • Supported by:
    Technology Cooperation Project of Luzhou Municipal People's Government and Southwest Medical University(2019LZXNYDJ40);Basic Research Project of Luzhou Science and Technology Program(2018-JYJ-43);Scientific Research Project of Sichuan Health Committee(19PJ294)

Abstract:

Objective To systematically evaluate the effects of threshold inspiratory muscle training (TIMT) on respiratory function, motor function and quality of life in patients with chronic obstructive pulmonary disease (COPD).
Methods Randomized controlled trials (RCT) about the effects of TIMT on dyspnea, quality of life, motor function and inspiratory muscle strength for COPD patients were retrieved from PubMed, EBSCO, Web of Science, Ovid, Cochrane Library, SinoMed, CNKI, VIP, since establishment to September, 2020. Two researchers independently screened literatures, extracted data and evaluated the methodological quality. A meta-analysis was performed using RevMan 5.3.
Results A total of 30 RCTs involving 2 060 patients were included. TIMT could obviously improve the maximum inspiratory pressure (MD = 10.68, 95%CI 7.43 to 13.92, P< 0.001), optimize the results of 6-minute Walking Test (MD = 24.62, 95%CI 9.09 to 40.15, P= 0.002), the St George's Respiratory Questionnaire (MD = -3.08, 95%CI -5.84 to -0.33, P= 0.03), the modified Medical Research Council Dyspnea Scale (MD = -0.30, 95%CI -0.52 to -0.07, P= 0.01) and Borg score (MD = -0.84, 95%CI -1.24 to -0.44, P< 0.001). TIMT could also improve the forced expiratory volume in one second (MD = 0.11, 95%CI 0.04 to 0.19, P= 0.003) and the forced expiratory volume in one second in predicted (MD = 3.72, 95%CI 2.62 to 4.82, P< 0.001). There was no significant difference in the COPD Assessment Test (MD = -1.14, 95%CI -2.32 to 0.03, P= 0.06) or forced vital capacity (MD = 0.07, 95%CI -0.12 to 0.25, P= 0.49).
Conclusion TIMT can improve the inspiratory muscle strength, alleviate the symptoms of dyspnea, and improve the lung function and the quality of life for COPD patients.

Key words: threshold inspiratory muscle training, chronic obstructive pulmonary disease, randomized controlled trial, meta-analysis

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