Tony Horton, of P90X and 10-Minute Trainer fame who, as of this summer, is now 56 says a better goal is to be in great shape, healthy, and very active after fifty. That's totally doable!
This issue Horton says is, "sustaining the motivation and discipline" to stick to your plan. He says you need to have three things in place.
First you need a purpose. If you want a better life, physical movement is the "on switch."
Secondly he says you need to plan all your workouts in…