Inclusion Criteria:

• Waiting for unilateral total hip or knee replacement surgery for a minimum of 6 months;
• Able to provide informed consent;

Exclusion Criteria:

• Previous hip or knee surgery;
• Any medical conditions for which moderate to vigorous exercise is contraindicated;
• Patellar or hip joint instability;
• Any other disease/condition which severely effects functional performance e.g. stroke or Parkinson's disease;
• Chronic depression or significant psychiatric disorder;
• Enrolled in a clinical trial (or recently completed one);
• Cognitive impairment which would affect compliance to BoneFIt service;
• Patients unable or unwilling to commit to required study follow-ups
• Pregnancy;