HIIT workouts can boost your metabolic rate (helping you burn more calories throughout the day). And science backs up this ...

In less than 20 minutes, you can sculpt your arms and abs with this upper body dumbbell workout, all while getting your heart ...

If you're struggling to squeeze in your HIIT workout ... For more dance workout videos like this one, we put together a roundup of the best 30-minute dance workouts on YouTube to make you sweat.

Edwards packs 4 rounds of 10 exercises into this 30-minute HIIT-style workout, with brief “active break” periods between each round. All of the exercises take 30 seconds followed by 10 seconds ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Want an exercise program that helps you work out smarter, not harder? You've found it. The Women's ...

High-intensity interval training has transformed the landscape of modern fitness ... Research indicates that HIIT sessions ranging from 20-30 minutes can produce comparable or superior results ...

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The teacher-turned-fitness instructor shares the wild journey that led him to reality TV.