Knee osteoarthritis (OA) is a highly prevalent musculoskeletal condition. It is estimated that in 2020 about 654.1 million individuals aged 40 years or older were suffering from knee OA around the world; Correspondingly, the prevalence of knee OA in this population was about 22.9% (Cui et al., 2020). Physical therapy such as exercise and weight loss, which is often guided by physiotherapists via face-to-face interaction with patients, has been demonstrated effective in reducing pain and improving physical function among patients with OA of the knee (Jamtvedt et al., 2008). However, there are challenges and barriers for patients accessing in-person physical therapy, such as long distance and high costs (Fernandes et al., 2013). In the context of the unprecedented COVID-19 pandemic, public health measures like lockdown and social distancing pose further limits on patient-physiotherapist in-person interaction. As a result, telerehabilitation has.....