One study suggests that people with higher levels of physical fitness and physical activity are less likely to develop the functional limitations often associated with aging. These include problems with personal care such as bathing, dressing, and feeding. Women don't benefit as much as men from physical activity. Women respond to exercise and activity in generally the same physiological and biochemical way as men. They also derive the same health benefits.
Women get big muscles when they exercise.
The male hormone, testosterone, is responsible for muscle bulkiness in males. This hormone is present in women but in quantities one-tenth that of men. Women who have participated in an intense weight training program for several months have shown significant increases in strength. However, their increase in muscle size might be relatively small. Women benefit significantly from weight-bearing exercise, especially after menopause.