Osteoporosis is a condition that makes bones weak so they break more easily.
Bones rely on calcium they store to stay strong throughout life. But, the "bone bank" for storing calcium is only open for a short time.
Tweens (kids ages 9 to 12) and teens can help prevent osteoporosis by filling their bone banks with calcium when they are young, so that their bones can use it throughout life.
Weight-bearing physical activity is also important for building strong bones.
