Inclusion and exclusion criteria
| Inclusion criteria | Exclusion criteria | |
| Telephone screening | Between 61 and 70 years of age | Current participation in an organised exercise class >1 per week |
| Retired (more than 6 months, <50% paid/unpaid work) | Moderate-intensity physical activity ≥150 min/week in the previous 3 months | |
| Community dwelling | Travels >2 months planned during intervention period | |
| Able to read a newspaper or text on a smartphone | ||
| Speaks Norwegian/Dutch/German | ||
| Able to walk 500 m without walking aid | ||
| Available for home visits the following 6 weeks | ||
| Risk screening | ‘At risk’ for functional decline | Cognitive impairment (Montreal Cognitive Assessment (MoCA) <24 points) |
| Acute depression (STU and AMS) | ||
| Medical screening | Medical condition (heart failure New York Heart Association (NYHA) class III and IV) | |
| Acute myocardial infarction last 6 months or unstable angina | ||
| Pericarditis, myocarditis, endocarditis in the last 6 months | ||
| Symptomatic aortic stenosis; cardiomyopathy | ||
| Resting blood pressures of a systolic >180 mm Hg or diastolic >100 mm Hg or higher | ||
| Chronic obstructive pulmonary disease (COPD) Gold class III and IV | ||
| Uncontrolled asthma at least two exacerbations in the last 6 months | ||
| Amputated lower extremities | ||
| Active cancer treatment during the last 6 months | ||
| Ankylosing spondylitis | ||
| History of schizophrenia | ||
| Parkinson’s disease | ||
| Cerebrovascular accident last 6 months | ||
| Epilepsy treated with medication | ||
| Severe rheumatoid arthritis (RA) interfering with mobility | ||
| Fracture of lumbar spinal vertebra/thoracic spinal vertebra or lower extremity in the last 6 months | ||
| Three fractures in the last 2 years due to severe osteoporosis | ||
| Acute depression (TRD) | ||
| After screening process | Spouse/living together with an already included participant in this trial |
AMS, clinical site Amsterdam; STU, clinical site Stuttgart; TRD, clinical site Trondheim.