Bone is a living, growing tissue. During youth, your body makes new bone tissue faster than it breaks down older bone. In young adulthood, bone mass is at its peak; after that, bone loss starts to outpace bone growth, and bone mass decreases. But it's a long and very slow process that can be slowed down even more through calcium-rich diets and weight-bearing exercise.
Most people have no need to monitor bone mass, but certain groups — postmenopausal women, men and women with certain diseases, and anyone who takes medications that affect bone tissue — might want to watch for decreases in bone mass. The bone mass reading is to be used as a guide only. Watch for trends over time and contact your healthcare provider for a more detailed explanation of the readings and with any questions or concerns.
It's important to measure changes in your bone mass over several years. Try to maintain healthy bones by exercising frequently and consuming a calcium-rich diet.