“…The included studies originated from the United States (n = 4), 50–53 South-Korea (n = 4), 54–57 Australia (n = 3), 58–60 Italy (n = 3), 18,61,62 Canada (n = 3), 17,63,64 China (n = 3), 19,20,65 Turkey (n = 2), 66,67 the United Kingdom (n = 1), 68 Denmark (n = 1), 69 Norway (n = 1) 70 and Cyprus (n = 1). 71 The number of participants in any single study varied from 20 to 306, with the lowest reported mean study age being 65.0 (± 8.0) years and the highest reported mean study age 83.0 (± 4.8) years. Among the 26 included studies, the following medical conditions were reported; chronic obstructive pulmonary disease (n = 5), 58,60,62,68,69 total knee arthroplasty (n = 4), 17,50,56,63 chronic heart failure (n = 4), 19,59,62,70 total hip arthroplasty (n = 1), 64 coronary artery disease (n = 1), 65 stroke (n = 1), 20 chronic lower back pain (n = 1), 52 Parkinson's disease (n = 1), 18 Alzheimer's disease (n = 1), 66 COVID-19 (n = 1) 67 and sarcopenia (n = 1).…”