FOF in older women is a common and persistent complaint that is caused mainly by impairments of balance and mobility. A range of social, psychological, and physical risk factors for disability are associated with persistence of FOF. These results imply that early intervention may be important for the prevention of persistent FOF.

Vitamin D therapy was observed to increase muscle function in those who were the weakest and slowest at baseline. Vitamin D should be given to people with insufficiency or deficiency to improve muscle strength and mobility.