Effect of 6-week retro or forward walking program on pain, functional disability, quadriceps muscle strength, and performance in individuals with knee osteoarthritis: a randomized controlled trial (retro-walking trial).
Ahmad H AlghadirShahnawaz AnwerBibhuti SarkarAshis K PaulDilshad AnwarPublished in: BMC musculoskeletal disorders (2019)
Controlled Trials ISRCTN12850845 , Registered 26 January 2015.