It is, it really is. And as much as cynics say running will eventually wear me down to nothing, studies have shown that us runners tend to weigh less, be nonsmokers, have fewer chronic health problems, enjoy better overall health than their non-jogging peers, and have stronger bones, as well. Subjects (about 900 men) in a recent study that ran at least once per month had higher bone density than their sedentary counterparts. And those who jogged nine or more times per month had the greatest bone density. However, those who reported jogging 20 or more times per month had about the same bone density as less frequent joggers. C?est la vie.