Effectiveness of Intervention in Prevention of Sarcopenia, Frailty and Functional Decline in Pre-frail Community Elderly

General objective: To assess the effectiveness and safety of a multimodal and multidisciplinary intervention in the prevention of sarcopenia, frailty and functional decline in pre-frail community elders aged 70 years or older. Specific objectives: 1. Evaluate the effect of the study intervention in the medium term (1 year) in terms of prevention or improvement of: 1. Muscle strength, muscle mass and sarcopenia, 2. The fragility 3. Functional capacity (and/or dependence), balance and the risk of falls 4. Nutritional status 5. The quality of life 6. The consumption of health resources in pre-frail community elders 70 years or older. 2. To evaluate the safety of the mid-term study intervention (1 year) in pre-frail community elders aged 70 years or older. Secondary objectives: 1. Assess the degree of adherence to the study intervention. 2. Evaluate the factors related to good adherence to the study intervention. 3. Describe the main characteristics of pre-frail community elders and analyze the factors associated with sarcopenia and functional impairment in the study population (cross-sectional analysis). 4. Describe the survival of the study sample and find out what the main determinants are (longitudinal analysis).