Table 1 Criteria for participants in the trial

Age: 45–70 years, both years included

More joints (hip, knee or ankle) with expected joint replacement within a year

Patients scheduled for primary cementless total hip replacement

Prior joint replacement on any joints (hip, knee or ankle), or any joint related surgery on lower limbs, still providing symptoms

Endstage primary hip OA or secondary OA due to mild hip dysplasia (CE-angle >20 degrees)

BMI >35

Any physical disability preventing patients from walking 20 meters without aid

Any neurological disease (ex. cerebral thrombosis, Parkinson) compromising the walking ability

Any severe medical condition compromising the physical function (ex. Chronic heart failure, chronic obstructive pulmonary disease) Evaluated by 30s-CST-test

Severe dementia (OMC < 18)

Inability to read and understand Danish writing and oral instructions

Does not wish to participate