Effectiveness of Rehabilitation Interventions on Adults With COVID-19 and Post COVID-19 Condition. A Systematic Review With Meta-analysis.

To evaluate the effectiveness of rehabilitation interventions for adults with COVID-19 and post COVID-19 condition (PCC) in all settings. PubMed, EMBASE, CINAHL, Scopus, Web of Science, and Physiotherapy Evidence Database were searched from inception to December 31st, 2021. PROSPERO registration number: CRD42021258553. We included randomized controlled trials (RCTs) and non-randomized studies of interventions (NRSI) according to the University of Alberta Evidence-based Practice Center. One author extracted data using a predetermined Excel form. The meta-analysis indicates uncertain evidence about the effect of pulmonary rehabilitation and self-activities on exercise capacity (MD 65.06, 95% CI 42.87 to 87.25), respiratory function (forced expiratory volume in the first second [FEV1]: MD 0.16, 95% CI 0.05 to 0.28; FEV1/forced vital capacity [FVC]: MD 0.05, 95% CI 0.01 to 0.09; FVC: MD 0.19, 95% CI -0.03 to 0.42) and anxiety (MD -12.03, 95% CI -21.16 to -2.90) in mild COVID-19 and PCC patients. According to the narrative synthesis, including RCTs and NRSI, prone positioning seems to show improvements in vital parameters in severe COVID-19 post intensive care unit (ICU) discharge, pulmonary rehabilitation in activities of daily living, and qigong exercise and acupressure rehabilitation program, and "twist and raise" walking technique in reducing dyspnea and weakness in any degree of severity of COVID-19 and PCC. Functional electrical stimulation-cycling or early rehabilitation programs seem to support a faster recovery in patients with moderate COVID-19 after ICU discharge. Yoga and naturopathy, Mandala coloring, and respiratory exercise seem to reduce anxiety and depression in patients with moderate and mild COVID-19. Cognitive motor training seems to improve cognitive function in PCC patients. There is very uncertain evidence about the effect of pulmonary rehabilitation on exercise capacity and respiratory function in patients with mild COVID-19 and PCC. Further high-quality research is required to improve the certainty of evidence available to support rehabilitation's crucial role in managing COVID-19.

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