Optimizing Prevention of Hospital-Acquired Disability Through Multidomain Interventions

Inclusion Criteria: * Age \>70 years; * Mild to moderate frailty, defined by a panel of tools agreed upon by the group of researchers involved in the study (Primary Care Frailty Index \[PC-FI\] between 0.07 and 0.21, Clinical Frailty Scale \[CFS\] 4-6); * Ability to walk with or without assistance * Ability to communicate and cooperate with the research team; * Ability to sign informed consent. Exclusion Criteria: * Expected hospital stay duration \<3 days; * Estimated prognosis quoad vitam \<12 months; * Persistent clinical instability, indicated by a NEWS2 score \>5 (assessed within 48 hours of admission) and/or the presence of delirium (4AT \>4); * History of schizophrenia, major depression, bipolar disorder, or psychosis; * Severe sensory deficits (visual and auditory); * Presence of a nasogastric tube or percutaneous endoscopic gastrostomy (PEG); * Severe cardiac conduction disorder (e.g., third-degree atrioventricular block), uncontrolled arrhythmia, new Q wave in the past six months, or ST segment depression (\>3 mm) on the electrocardiogram; * Terminal stage oncological or organic disease (e.g., Child-Pugh C cirrhosis, stage V renal disease, GOLD stage D chronic obstructive pulmonary disease, end-stage heart failure); * Residence in a nursing home before hospital admission; * Presence of dissected aortic aneurysm, severe aortic stenosis, acute endocarditis/pericarditis, acute thromboembolism, uncontrolled hypertension (\>180/100 mmHg) or postural hypotension, uncontrolled hypoglycemia, recent fracture within the last month, or any other medical condition that hinders the execution of physical activity according to clinical judgment; * Any condition that prevents safe participation in the intervention and/or cooperation with the study; * Concurrent participation in other clinical studies; * Clinical conditions or situations significantly different from the condition under study, which in the investigator's opinion could interfere with the study or prevent optimal participation; * Participants refusal to participate in the study.