The thing about fitness books that they tell you is to do it slow and correct, to prevent any injuries. And that is valuable advice for a beginner.

But after you do it for a while, whatever your workout is, whether it's weight lifting, doing the machines, aerobics, the fact is that repetition stunts growth.

So I've been reading a lot of fitness books lately, and their advice on weight lifting specifically is to do it fast and hard. What this means is that if you're currently lifting 10 lb dumbells on a normal basis for 40 repetitions, you should upgrade to a higher weight level (no more than your body can handle) such 25 lb dumbells and do 20 repetitions or until your muscle starts to feel the burn.

Here's also a good aerobic tip: Do 5 minutes of super fast running in place, then 5 minutes at a normal pace, then 5 minutes at a super fast pace again, and repeat, etc. What does this do? It trains your heart muscles and expands them to make them stronger by pushing it. It also strengthens your metabolism, which will help you to lose weight faster. But only do this if you're at a healthy starting point.

And always drink lots of water, because the more water you drink, the less water your body holds on to as added pounds, and the less your "water weight" will be.

Paul Newman is still a fit guy to this day, and is probably a role model on how to stay healthy until your 70s.