Cardio
What Kind of Runner Runs Back-to-Back Races?

Maybe you. Here’s how to (safely!) pull off this triple feat.

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RACESarticle
8 Cardio Workouts That Burn 300+ Calories in 30 Minutes

Tired of the “dreadmill”? Try these 8 calorie-blasting cardio workouts this winter (and beyond) to burn up to 600 calories in just 30 minutes.

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CARDIOslide show
The Secret to Being a Marathon Winner

Science discovers why Kenyans are so fast. And yes, you can learn the superpower too!

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RUNNINGarticle
The Most Important Minute in Your Workout

Killing yourself at the gym? Use your time right and 60 seconds might be enough to improve your endurance and fitness.

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Exclusive Run-Sculpt Routine from the Mile High Run Club

Running classes are all the rage right now! See why with this at-home cardio plan that busts treadmill boredom and gives you the killer conditioning workout you crave.

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The Workout That Could Make You Sick

Exercise is good for the immune system, right? Well, new research says certain training could leave you feeling under the weather.

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Trick Yourself Into Running Faster!

Try this mental technique for a faster running time today.

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RUNNINGarticle
Female Swimmer Makes History

Alia Atkinson becomes the first black female to set a world swimming record and grab gold at the championships.

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SWIMMINGarticle