 Staying active and healthy as we age starts with strong bones. To keep your bones strong, you need calcium, vitamin D, and regular exercise. A bone density test called DEXA helps detect low bone mass and bone disease called osteoporosis. If you're 65 or older, Medicare provides free bone density tests every two years. Ask your doctor to schedule yours. For more information on how to be bone strong, visit pathtogoodbonehealth.org.