Total hip replacement (THR) or total hip arthroplasty (THA) is one of the most common orthopaedic surgeries performed and has been termed as the "operation of the century". It has been suggested that impairment and physical limitations persisted in the long-term following a THR, even in the absence of pain, with reduced muscle strength, postural stability and flexibility. These factors would indirectly affect the physical activity levels of a patient which neutralizes one of the purposes of the total hip replacement. Reduction in the ability to be physically active is one of the reasons a patient undergoes a total hip replacement, others being pain and disability. One of the goals of the orthopaedic surgeon is to bring a patient back to an acceptable level of physical function and activity, post-surgery. This depends on both compliance with rehabilitation programmes and ability of the patient. Previously is has been found that there is only a small increase in patients' actual physical activity at post THR surgery, possibly due to the lifestyle changes adopted by the patients to manage their condition prior to undergoing surgical intervention.