About 34 million Americans have low bone mass, which is called osteopenia. Ten million more have a very low bone mass, which is called osteoporosis. These people are at a higher risk for fracturing and breaking bones, which can cause serious problems in aging populations.
Placing external pressure on the bone helps to increase the bone mass. The force causes the bone to adapt. Evidence suggests both aerobic and strength training exercise programs help prevent and treat osteoporosis.