Table 1.

Eligibility criteria.

Inclusion Criteria	• Male and female, aged 60 years and over;
	• 3 to 6 months post unilateral total hip replacement surgery for osteoarthritis;
	• Can provide verbal confirmation that they have been discharged from their surgical care;
	• Capable of independent walking;
	• Capable of completing the activity diary independently;
	• Have access to a smartphone or computer;
	• Willing to complete the trial protocol.
Exclusion Criteria	• Unable to provide informed consent;
	• Unable to complete follow-up (insufficient English, lives overseas, unable to return easily);
	• Not physically able to use Grail gait lab;
	• Systematic disease affecting walking ability (chronic obstructive pulmonary disease (COPD), congestive heart failure (CHF), chronic kidney disease (CKD), Parkinson’s Disease, cerebral palsy, multiple sclerosis etc.);
	• Requiring revision hip replacement;
	• Previous hip replacement (resurfacing or THR) on the contralateral side;
	• Known metastatic tumour involving the hip.