Vitamin d and exercise may fight bone loss in breast cancer survivors

This study looks at whether high-dose vitamin D and a home exercise program (walking and strength training) can help prevent bone loss in women being treated for breast cancer. About 191 postmenopausal women with early-stage breast cancer will take either vitamin D or a placebo, with or without the exercise program. The goal is to see if these approaches improve bone density, fitness, and muscle strength.