Table 1 Overview of eligibility criteria

- Age: ≥ 70 years

- Exercise > 1/week in past 3 months

- Moderate to vigorous physical activity > 150 min/week in past 3 months

- Living at home

OR

“supervised living” without having active assistance

- Medical conditions:

 - Heart failure (NYHA class III & IV)

 - Recent cerebrovascular accident (< 6 months)

 - Parkinson’s disease

 - On active cancer treatment (last 6 months)

 - Chronic Obstructive Pulmonary Disease Gold class III & IV

 - Unstable lower limb fracture

 - Amputated lower extremity (−ies)

 - Acute treatment of depression

 - Uncontrolled resting blood pressures of a systolic > 160 or diastolic > 100 or higher

- Fall risk, defined as > 2 falls within the last 12 months

OR

1 injurious fall within the last 12 months

OR

subjectively perceived balance decline AND Timed Up-and-Go time ≥ 12 s

- Able to speak and read in German

- Able to ambulate 200 m without personal assistance

- Unavailability for home visits within 11 weeks after baseline assessment

- Travel > 2 months planned within first 6 months of the study

- Moderate to severe cognitive impairment (Montreal Cognitive Assessment < 23)

- Current participation in another scientific trial