Table of contents Biology of bone.- Aging and bone.- Hormones and bone.- Animal models for senile osteoporosis.- Senile osteoporosis: how to recognize a geriatric syndrome?- Epidemiology of osteoporosis.- Falls as a geriatric syndrome, how to prevent it? how to treat it?- Treatment of senile osteoporosis: present and future.- Non pharmacological treatment and prevention of falls and fractures.