Design and Validation of FEXO: A Playful Exercise Program for Institutionalized Frail Older Adults

Inclusion Criteria: * Age ≥75 years. * Resident in a long-term care facility (residencia geriátrica) affiliated with the Ballesol group (Levante area: Valencia and Alicante). * Provide informed consent (or consent by legal representative, if appropriate). * Functional and/or cognitive status that allows them to participate in basic physical activity and understand and follow basic verbal instructions. Exclusion Criteria: * Unstable medical condition or uncontrolled chronic disease. * Severe cognitive impairment or advanced dementia that prevents comprehension or adherence to the intervention, determined by clinical assessment or MMSE \<15. * Severe physical disability. * Active infectious disease or acute condition requiring isolation or rest. * Participation in another structured physical activity or rehabilitation program during the study period. * End-of-life situation or terminal illness. * Any condition that, in the judgment of the research or clinical team, would interfere with participation or data collection.