Background: Chronic obstructive pulmonary disease (COPD) is a chronic lung disease which feature is progressive airflow obstruction. Singing is a popular and convenient activity that requires people to manage their lung volumes and airflow actively. Despite the well-known benefits of singing to healthy people, the specific effect still remains unclear. Objective: To investigate the mental and psychological benefits of singing in patients with stable COPD. Search Methods: We used Preferred Reporting Items for Systematic Reviews and Meta-Analyses Guidelines (PRISMA) on randomized controlled trials (RCTs) including singing exercise as the main intervention in stable COPD. We searched 8 electronic databases, including Web of Science, PubMed, Embase, Cochrane Library, Clinical Trials.gov, and the Physical Therapy Evidence Database (PEDro), CNKI, and Wanfang Database from inception until May 2022. The searching languages was English or Chinese. Data extraction using standardized templates was performed by two independent reviewers. The quality of the studies was assessed using the PEDro scale. Data synthesis was performed with Revman 5.4. The pooled effect sizes are reported by MD and 95% CI. Results: Five RCTs involving 333 patients with stable COPD were included in this meta-analysis. Singing was regarded as the main intervention in the experimental group. Meta-analysis revealed that singing improves quality of life on Short Form 36 physical component summary (SF-36 PCS) (MD = 12.63, 95% CI: 5.52 to 19.73, P < 0.01) and respiratory muscle in maximal expiratory pressure (PE max ) (MD = 14.30, 95% CI: 0.87 to 27.73, P = 0.04) in patients with COPD. However, it has limited effects on Short Form 36 mental component summary (SF-36 MCS), lung function, exercise capability, and adverse mental state. Conclusion:Based on results of the meta-analysis, singing could be used to improve quality of life (SF-36 PCS) and respiratory muscles (PE max ) in patients with COPD.
Background: Chronic obstructive pulmonary disease (COPD) is a chronic lung disease with high mortality and disability rate. It caused the progressive airflow obstruction along with the change of relevant soft tissue. Stretching could lengthen the shorten respiratory muscle and increase its flexibility. Objectives: To investigate the effectiveness of stretching on the COPD patients. Methods: The PRISMA guideline was used to perform the review. We searched on six online databases (Web of Science, PubMed, Embase, Cochrane Library, CNKI and Wanfang Database) from inception until March 2022. The quality of the studies was appraised by PEDro scale. The pooled effect sizes of exercise capability, lung function parameters, dyspnea, psychological status and quality of life were reported. Result: Of 422 studies, 11 studies (424 participants) met the inclusion criteria. The overall effect size of the 6MWT showed statistical difference between stretching group and the control group (P<0.00001). Among the lung function parameters, only respiratory rate (RR) and expiratory time (Te) showed superior statistical effect. The data about the psychological state, dyspnea and quality of life were too scant to conclude. Conclusion: Stretching seemed to have strong effectiveness on improving the exercise capacity, and the breathing temporal parameters could be changed through stretching.
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