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.

Focus on your problem zones, your strength, your energy, your flexibility and all the rest. Maybe your chest is flabby or your hips or waist need toning. Also, you should change your program every thirty days. That's the key.

Muscle cells strengthen in response to intense exercise - whether you're 18 or 88. But the intensity is what's lacking in most people's workouts. And there are doctors who'll give you the advice, "Well, don't push it."

I was going to be a singer. If I hadn't been in my profession, I was going to be an Opera singer. That's from a young kid. I had all these records from all those famous Opera singers. I wanted to be an Opera singer - that was my whole thing and physical fitness got in the way, thank God.

One of the reasons so many people fail is they get on this treadmill for an hour or an hour and a half. That's totally unnecessary. If it's cardiovascular, you don't need more than 15 to 17 or 18 minutes if it's vigorous.

I've never been satisfied with myself, ever. But I feel good about myself, because I'm truthful. I don't corrupt myself. I'm also a perfectionist. I'm very impatient. I've got energy and drive and I can't stand inefficiency in people. And I can't stand dumb people. Why surround yourself with people who are going to tie you down? I don't suffer fools.

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