The brain's preferred source of fuel is glucose/carbohydrates. And when you go on a low-carb/high-protein diet, your brain is using low-octane fuel. You'll be a little groggy, a little grumpy.

People feel so guilty about not exercising. Especially people over 50, who feel like they've gone a lifetime without taking care of themselves. Instead of aiming for perfection, you should try to celebrate the progress you're making.

It’s not what you do some of the time that counts, it’s what you do all of the time that counts.

That is the beautiful part about weights: even if you are 100 year old, you can lift something. Maybe it's only a half a pound or a pound or two pounds. It will still do something.

You've got to work at living-99 and 9/10 of Americans work at dying!

Focus on your problem zones, your strength, your energy, your flexibility and all the rest.

Exercise is king. Nutrition is queen. Together, you’ve got a kingdom. If you have a Corvette, you don’t put water in the tank. The human machine deserves the same treatment.