THE KNEE STRESS TEST: a proposed test for assessing patient outcomes following knee replacement using a bicycle power meter

Assess muscle function using a power meter attached to a stationary bicycle in participants undergoing total knee arthroplasty surgery. Muscle power will be assessed pre-operatively and post-operatively at 3 months, 6 months and 12 months to determine the reliability and validity of the power meter testing protocol in this patient population. At each assessment participants will undergo a routine physical examination by an Orthopaedic Surgeon or Physiotherapist to ensure they have adequate range of movement and physical ability to operate the bicycle. The participants will be asked to complete the OKS and KOOS questionnaires. The bicycle power assessment and the performance-based outcome measures (10MWT and 30sSTS) will then be completed with assistance from the physiotherapist. The participants will be asked whether they have pain when completing the 10MWT, 30sSTS and bicycle power assessment, and if applicable a score from 0 to 10 for their level of pain, with 0 being no pain. The bicycle power assessment will consist of a 1-minute warm-up, followed by three sprint phases of 10 seconds (maximal exertion) with 1-minute recovery phases in between. Total duration of the assessments is approximately 30 minutes pre-operatively and 20 mins post-operatively at 3,6 and 12 months.