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Home » Lose Weight » Cardio vs. weights: Which is actually better for weight loss? – CNN

Then strength training muscled its way into the spotlight as the must-do move for revving your metabolism and losing weight in your sleep, prompting many exercise enthusiasts to join #TeamNoCardio.

So a few years ago, Duke University researchers took to the lab and conducted the largest study of its kind to compare the two and get an answer once and for all.

The cardio group lost about 4 pounds while their resistance training peers gained two. Yes, the weight gain was attributed to added lean mass.

However, that muscle mass didn't lead to any meaningful fat loss over the course of the study. In fact, the aerobics only group shed more than 3 pounds of fat while the lifters didn't lose a single pound despite the fact that they actually exercised 47 more minutes each week than the cardio group.

Not surprisingly, the cardio-plus-resistance group improved their body composition best -- losing the most fat while adding some lean mass. But they also spent twice as much time in the gym.

It's simple math, says study co-author Cris Slentz, PhD, assistant professor of medicine at Duke University. "Minute per minute, cardio burns more calories, so it works best for reducing fat mass and body mass."

That's not to say that you shouldn't lift weights, especially as you get older and start losing muscle mass, he notes. "Resistance training is important for maintaining lean body mass, strength and function, and being functionally fit is important for daily living no matter what your size."

That means more calories burned.

It's also important to remember one essential fact about exercise and weight loss, says Slentz. "Exercise by itself will not lead to big weight loss. What and how much you eat has a far greater impact on how much weight you lose," he says.

That's because it's far easier to take in less energy (calories) than it is to burn significant amounts and it's very easy to cancel out the few hundred calories you've burned working out with just one snack.

Where exercise appears to matter most is for preventing weight gain, or for keeping off pounds once you've lost weight, says Slentz. "Exercise seems to work best for body weight control," he says.

The National Weight Control Registry, which since 1994 has tracked more than 10,000 people who shed an average of 66 pounds and kept it off for at least five years, would agree.

Ninety percent of successful weight loss maintainers exercise for about an hour a day and their activity of choice is cardio, simply walking.

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Cardio vs. weights: Which is actually better for weight loss? - CNN

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Home » Lose Weight » Cardio vs. weights: Which is actually better for weight loss? – CNN