To maintain good health and prevent osteoporosis, women in their 40s should focus on regular exercise, a balanced diet, and routine medical check-ups. Regular exercise, such as weight-bearing and resistance exercises, helps strengthen bones. A diet rich in calcium and vitamin D supports bone health. It is important to get a physical exam every year after age 40 and discuss any health concerns with a doctor. Avoid smoking and limit alcohol intake as both can weaken bones. Also, maintaining a healthy weight is crucial as excess weight can strain bones. Regular screenings like mammograms are essential for early detection of potential health issues.