This is most often caused by changes in the muscles and tendons, rather than changes in the nerves. Decreased knee jerk or ankle jerk are not unexpected. Muscle contractions or inablitiy to move a muscle may occur in those unable to move voluntarily or to have their muscles stretched through exercise. Restless leg syndrome may occur. A moderate exercise program can maintain strength and flexibility.
Exercise helps the bones to remain strong.
Consult with your health care provider before beginning a new exercise program. A well-balanced diet with adequate amounts of calcium is important. Women need to be especially careful to get enough calcium as they age. For women, estrogen supplements can also help prevent osteoporosis. Please read it.