1, 20 years old: pay attention to your weight. Losing weight without exercise can easily lead to bone loss. Choose an appropriate exercise plan. It is ideal to exercise for 20-30 minutes every day. You can choose running and weightlifting. Pay attention to menstruation. Irregular menstruation (less than 6-8 times a year) is related to low estrogen level and low weight, which is a double blow to bones and easy to cause osteoporosis.

2, when you are in your 30 s: do a good job of bone protection during pregnancy. Calcium should be properly supplemented during pregnancy. In addition to calcium supplementation for pregnant women, the fetus also needs some calcium. Identify drug risks. Corticosteroids and anticonvulsants can easily cause bone loss. Relieve stress. Stress hormones such as cortisol can inhibit bone growth and accelerate bone loss. Pay attention to oral contraceptives. Long-term use of contraceptives may inhibit the production of estrogen, leading to bone loss in young women.

3, when you are in your 40 s: pay attention to menstrual changes. Irregular menstruation or even once every other month may be a signal to enter perimenopausal period. At this time, the plan of "exercise+calcium supplement" will be implemented. Pay attention to related diseases that lead to bone loss and fracture, such as hyperthyroidism and type 2 diabetes. Assess the risk of osteoporosis. Including smoking, eating disorders and so on. Discuss with your doctor whether to accept hormone replacement therapy for menopause.

When you are in your 50s, increase your calcium intake. At this age, 1200mg of calcium and 1000- 1500 IU of vitamin d should be supplemented every day. Pay attention to backache. Sudden back pain may be caused by a spinal fracture, which is very common in women after 50 years old. Check the bone mineral density every 3-5 years after menopause.