From the Sunday NY Times- March 2014

In the large-scale Nurses’ Health Study of more than 60,000 postmenopausal women, those who walked briskly at least four times per week were at much lower risk of hip fractures (an indirect but practical indicator of bone health) than the women who walked less often, more slowly, or not at all.

Had the walkers occasionally jigged backwards and sideways, all the better. So-called odd impacts, created when you move in a direction other than straight ahead, can initiate remodeling throughout the hipbone and spine in older people, a few recent studies suggest.

Now what dance does that bring to mind?