Can exercise reverse aging?

I'm not sure how much more often the world can tell you to exercise without you getting up and doing it, but just in case you're not convinced, here's yet another reason to start working out: it can reverse the aging process.

In a recent study, 25 elderly volunteers (65 and older) were able to reduce the age of their genetic profile by exercising. Through a rigorous but standard workout, the participants made significant changes in 1/3 of their genes related to aging -- essentially reversing the aging process at a cellular level.

This sounds amazing (and it is), but before you get carried away, the other 2/3 of aging-related genes weren't effected.

That said, all the volunteers felt more youthful -- namely, because they had more energy. The 200 or so genes that did change as a result of the physical activity are all related to the functioning of the mitochondria -- the cells that change nutrients into energy.

So, once again, exercise. It's good for you.