The Afterburn

Now here’s an even more shocking fact: When early studies compared cardiovascular exercise to weight training, researchers learned that those who engaged in aerobic activities burned more calories during exercise than those who tossed around iron. You’d assume, then, that aerobic exercise was the way to go. But that’s not the end of the story.

It turns out that while lifters didn’t burn as many calories during their workouts as the folks who ran or biked, they burned far more calories over the course of the next several hours. This phenomenon is known as the afterburn—the additional calories your body burns off in the hours and days after a workout. When researchers looked at the metabolic increases after exercise, they found that the increased metabolic effect of aerobics lasted only 30 to 60 minutes. The effects of weight training lasted as long as 48 hours. That’s 48 hours during which the body was burning additional fat. Over the long term, both groups lost weight, but those who practiced strength training lost only fat, while runners and bikers lost muscle mass as well. The message: Aerobic exercise essentially burns only at the time of the workout. Strength training burns calories long after you leave the gym, while you sleep, and maybe all the way until your next workout. Plus, the extra muscle you build through strength training means that in the long term, your body keeps burning calories at rest just to keep that new muscle alive.

the Abs Diet
pg 46

by David Zinzenko
editor-in-cheif of Men's Health

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