The remaining bone is normal but there is not enough of it to support the weight of the body at rest or in motion.
Bone loss can occur all through the body or in one specific area.
Bone loss at the ends of bones happens faster than in the middle. Healthy young women can build up bone mass into their thirties through physical activity, dietary calcium intake, and the use of oral contraceptives. This built up bone mass, or bone bank, slowly decreases as a natural part of the aging process. Menopause and a lack of physical activity as women age contribute to the bone density loss. But a rich bone bank built up early in life and plenty of activity can slow down and prevent any bone related disorders.