There doesn’t seem to be anything that walking doesn’t help

Exercise: Walking May Help Older Men Decrease Hip Fractures.
A large study lasting 24 years suggests the more men walk and the more vigorously they walk, the lower their risk for suffering a hip fracture. Researchers found that men who walked at least four hour a week saw a drop in hip fractures by 43% compared to those who walked less than an hour a week.
American Journal of Public Health, February 2014 Image