Burn fat faster in one workout

Intervals are a cardio workout's best friend. If you want a technical definition, they're periodic bursts of intensity followed by a recovery period. Here's my definition: they're periodic bursts of intensity that make a boring workout go by so much faster-and get my heart rate up fast so I know I'm getting serious benefits. There are lots of different ways to fold intervals into your routine: speed bursts where you go as fast as you can for one minute than recover for 30 seconds, or a full 5 minutes up a steep hill on a bike or treadmill. However you choose to do them, here are a few more reasons to turn up the volume on your workout.


You'll kick in that awesome afterburn effect: Just like strength training, doing intervals is a great way to keep up the fat-burning well after your workout. Depending on the length and intensity of your cardio, your body may burn an additional 65 to 150 calories-that may not seem like a lot, but if you did that five days a week, on top of your regular workout, you could potentially lose an additional 7 pounds in a year without even trying.

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You'll stay present and focused on your workout. You know that girl at the gym talking on her cell phone while she's on the elliptical trainer? Do you think she's getting a good workout? She's not. If you make the effort to get there, do a workout and shower it should be time (and calories) well spent.

You'll protect your heart You may not be worrying about heart health now but no reason not to get a head start on protecting your ticker-and a recent study found that doing 4 to 6 30-second sprints 3 days a week was just as effective at improving artery structure and function as longer, slower workouts 4-5 times a week.

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