Medical Fitness in Thermal Water is a physical exercise program aimed at everyone. It is especially suitable for people with metabolic and physiological alterations (hypertension, overweight, abnormal triglyceride and cholesterol values) and diagnosed chronic pathologies (diabetes, osteoporosis, arthrosis, obesity) but who are nevertheless in a stable state of health, and who need to increase the practice of physical activity. The onset of these pathologies is slow and silent, therefore, the sooner we intervene, the better the re-educational path towards regaining an optimal state of health.