“…Studies have also shown that an extended FTSST duration is related to a decreased quality of life and increased dependence during daily activity execution in adults and the elderly (Duncan, Leddy, & Earhart, 2011 FTSST is often used in rehabilitation evaluation, as well as in assessing lower limb function, balance, and mobility in the elderly (Goldberg, 2011;Regterschot, Zhang, Baldus, Stevens, & Zijlstra, 2015) and knee arthritis, stroke and function in patients with cerebellar dysfunction (Butler, Nence, & Major, 1991;Cayco, Gorgon, & Lazaro, 2016;Duncan et al, 2011;Elsa, Maik, Dieter, & Dieter, 2016;Poncumhak, Saengsuwan, Kamruecha, & Amatachaya, 2013). Existing research abroad evaluated lower limb function in COPD patients through tests, such as the sit-to-stand test (sit-to-stand frequency in 1 min) (Jones et al, 2013;Vaidya et al, 2017).…”