Jagger decided early on that if he was to have longevity in the biz he better get / stay in shape, and started jogging and getting regular exercise. He’s never been too much into the drinkin’, druggin’ side of the rock lifestyle. He’s more of an example of clean living (for a rockstar, anyway).
Now Keith Richards, on the other hand-- yes, he looks like a walking corpse, but if anybody made a deal with the devil for long life…