Physical Activity & Osteoporosis
What Is Osteoporosis? - Osteoporosis is a generalized thinning and demineralization of the bone that typically occurs in postmenopausal women and is associated with aging and physical inactivity. Osteoporosis when the calcium present in the bones slowly decreases and the bones become brittle and prone to fracture. On the pictures at the right the one on top is normal bone and the other is less dense osteoporotic bone.
Risks Associated With Osteoporosis - Fractures of the spine, hip, and wrist are most common. Other bones, such as the ribs, humerus, and pelvis, are also affected. Osteoporosis causes more than 1.5 million fractures each year. Approximately 20 percent of hip fracture
victims die within one year, usually from complications such
as pneumonia. Hip fracture is responsible for about 65,000
deaths per year in the United States.
Physical Activity & Osteoporosis - A number of
controlled trial studies have reported that bone mineral
density is improved with weight bearing exercise. On the
graph the points that fall above the diagonal line represent
studies in which the treatment group (exercise) was better
than the control group (non-exercise).
The graph presented was adapted from data from 26 studies conducted from 1976 to 1997.