3. Lack of Physical Activity.
There are quite a few benefits of being active and while exercise can help you to look good, feel great, and help to monitor your body weight, it can be great on your bones. In contrast, a sedentary lifestyle is one that is damaging to your health in many ways, including harmful on your bones. The lack of activity can cause the bones to have to work not quite as hard and since bone is a living structure, it can dwindle over the years if you are not active. Consider being as active as possible and if you are at risk, consider talking with your doctor about activity.