Quote Originally Posted by trickytiger View Post


However, I do want to point out one great benefit that running provides that biking and swimming don't- while high-impact exercise can be hard on your joints, it also acts to strengthen and build bone mass. As long as you don't overload your legs with pounding (ie GRADUALLY increase length/time by no more than 10% a week), your body will eventually adjust.
Exercise doesn't have to be high impact to build bone density, it has to be weight bearing. Walking, squats,lying leg raises with ankle weights or a resistance band will do. And it won't beat up your joints.