Total Hip Replacement (THR) is a common surgical procedure performed in people with hip osteoarthritis and appears to be effective in relieving pain and improving function. However significant quadriceps atrophy and weakness persist post-operatively. Although relief of pain and improvement of function are important outcomes following THR, weakness of the hip and knee muscles reduces a person's ability to manage stairs, slopes, public transport and results in persistent gait abnormalities. Since lower limb weakness is one of the risk factors for falls, it is important that this is appropriately addressed.