Health and Fitness

After you work out, do you have the feeling that you can do anything? Well, you're not alone. That "runner's high" (which is actually triggered by any form of exercise, not just running) comes about because exercise floods your body with endorphins. These helpful biochemicals lift your mood and stimulate the release of another important hormone that affects your metabolism: human growth hormone (sometimes called HGH). This hormone is something we all want, and lots of it.

Q: What size dumbbells should I be using — 5-pound, 10-pound? What's a rule of thumb for how much to start with, when to move up, and so on?

I haven't gone soft on the importance of exercise or watching calories, but what I've discovered over the years is that a healthy metabolism (and essentially, healthy hormones!) is the key to changing your life — much more than just getting skinny. I'm talking about adding years of quality to your life.

Q: I don't have the equipment you show on the site and can't really afford to go out and buy it. Do you have any suggestions for what I can use instead?

A: Sure — let's get a little creative here. Instead of dumbbells, how about jugs of water, canned goods, candlesticks, or books? Anything that you can grip firmly and securely and that weighs at least 3 to 5 pounds will work.

Oh, you love cardio. I know it. But my program, for the most part, makes straight cardio exercise obsolete. The kind of resistance training I recommend includes cardio intervals and compound movements, which effectively raise your heart rate while burning fat. But as I always say, cardio is weight-loss extra credit — it's a great way to get a workout on days when you're giving your muscles a break from strength training.