To prevent osteoporosis in middle-aged people, it is important to ensure sufficient intake of calcium and vitamin D, which can be obtained from foods like milk, fish, and soy products. Secondly, moderate exercise such as walking, jogging, and weightlifting can strengthen bones. Additionally, avoid smoking and excessive drinking, as these habits accelerate bone loss. Maintain a healthy weight, as being too thin increases fracture risk. Regular bone density checks are essential for early detection and treatment. Lastly, prevent falls at home by keeping floors dry to avoid fractures from falls.