HRT is probably the only way of treating severe psychological menopausal symptoms. You will need to discuss its suitability for you with your cancer specialist. There are ways you can try to reduce these risks. Osteoporosis Oestrogen helps to maintain bone calcium levels and bone density. So the risk of osteoporosis increases after menopause.
Regular exercise helps to maintain bone density.
Walking is probably best - swimming will not help as your bones are not supporting your weight while you exercise. You should make sure you get enough calcium in your diet by eating dairy products, green leafy vegetables, nuts, and fish you eat whole such as white-bait, sardines, and pilchards. Be aware that smoking and alcohol can reduce your calcium levels. If other people in your family have had osteoporosis, you may wish to talk to your cancer specialist about using HRT to try to prevent it. Clinical trials are going on to examine how safe it is to use HRT after breast cancer.