“…However, low pre-operative function is a significant risk factor for increased LOS and predictive of worse longer-term function (Biring et al, 2007;Davis et al, 2006;Yeung et al, 2010). There are no studies of rehabilitation before RTHR but there is some evidence that exercise can improve pain, muscle strength and function before primary THR (Gill & McBurney, 2013;Skoffer, Dalgas, & Mechlenburg, 2015;Wang et al, 2016) although the size and clinical importance of these changes is debated. Whether pre-operative rehabilitation focused on optimizing function before RTHR is safe, feasible and can improve outcomes seems relevant to investigate.…”