VITAMINE: VITal AMsterdam older adults IN thE city (Dutch: VITale AMsterdamse ouderen IN dE stad)

INTERVENTION: The full study comprises a screening, a 6 month intervention period and a 6 month follow‐up (so a total duration of 12 months) After screening, Clusters of participants (i.e. training groups) will be randomly assigned to one of the following groups: 1. Control group (regular MBvO, or other comparable weekly exercise program, group, n=80) 2. Home‐based training program group supported by a tablet computer (VITA group, n=80) 3. Home‐based training program supported by tablet computer + Dietary protein counseling group (VITA‐Pro group, n=80) Baseline, 6 months and 12 month follow‐up measurements will be scheduled. CONDITION: Physical functioning, Older adults, Exercises, Protein ; ; PRIMARY OUTCOME: Change in physical functioning measured with the Modified Physical Performance Test (M‐PPT) between baseline and at 6 months. SECONDARY OUTCOME: ‐ Short Physical Performance Battery (SPPB) ; ; ‐ Timed Up and Go test (TUG) ; ; ‐ 6 minute walking test (6 MWT) ; ; ‐ Physical Activity Level ; ; ‐ Muscle strength: handgrip strength (HGS) ; ; ‐ Executive functioning (Trail Making, Stroop Color Word test, Letter Fluency) ; ; ‐ Quality of life (RAND‐36) ; ; ‐ Geriatric Depression Scale (GDS) ; ; ‐ Motivation for exercise (BREQ‐2) ; ; ‐ Dietary intake (3‐day food record) ; ; ‐ Waist circumference, hip circumference and waist/hip ratio ; ; ‐ Mid upper arm muscle area (Mid upper arm circumference and triceps skinfold) ; ; ‐ Appendicular skeletal muscle mass, regional fat mass, visceral fat mass (DXA) ; ; ‐ Fat mass and fat free mass (Air Displacement Plethysmography) ; ; ‐ Body weight (kg) ; ; ‐ Height (m) ; ; ‐ Body Mass Index ; ; ‐ Total Body Water (bioelectrical impedance analysis) ; ; ‐ Compliance ; ; ‐ Sustainability INCLUSION CRITERIA: ‐ 55 years of age or older ‐ Willingness that general practitioner will be notified on study participation ‐ Written informed consent ‐ Willingness to comply with the protocol ‐ Ability to comply with the protocol in the opinion of the study physician(s) (screening especially for any condition, medication, or circumstance that might interfere with the study protocol, to ensure safety for the participants)