Despite these profound losses in function, bone, and muscle, we remain uncertain about the extent to which these losses can be attributed to the fracture, and only limited attention has been given to preventing such losses. In addition, we seek to understand the role of exercise in relation to bone metabolism and levels of hormones thought to regulate bone metabolism following a hip fracture. Elucidating these mechanisms will be valuable for understanding the effects of exercise on bone health. The purpose of this study is to take an intervention known to be beneficial in select populations, into the real world setting and apply to frail older persons who have become suddenly disabled by a hip fracture. It is essential to test the effectiveness of the intervention following a hip fracture.