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Randomized controlled trials (RCTs) that evaluated patients who underwent cardiac surgery were included in this review. Meta-analysis performed using a random-effects model showed that the mean difference in forced vital capacity, forced expiratory volume in 1 second, 6-minute walk distance, and RMS was 3.47% (95% confidence interval [CI], 0.57 to 6.36), 5.80% (95% CI, 2.03 to 9.56), 78.05 m (95% CI, 60.92 to 95.18), and 4.8 cmH2O (95% CI, -4.00 to 13.4), respectively. There is strong evidence that IMT improves inspiratory muscle strength, pulmonary function, and functional capacity, and reduces the length of hospital stay in patients undergoing cardiac surgery.<\/jats:p>","DOI":"10.5535\/arm.21027","type":"journal-article","created":{"date-parts":[[2021,9,1]],"date-time":"2021-09-01T02:29:09Z","timestamp":1630463349000},"page":"264-273","update-policy":"https:\/\/doi.org\/10.5535\/crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Effectiveness of Inspiratory Muscle Training on Respiratory Muscle Strength in Patients Undergoing Cardiac Surgeries: A Systematic Review With Meta-Analysis"],"prefix":"10.5535","volume":"45","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3921-6805","authenticated-orcid":true,"given":"Fiona 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