9 Efficient Cardio Planks To Work Your Core *and* Spike Your Heart Rate

Cardio planks will work your core *and* spike your heart rate. Oh, and they'll make you extra sweaty, too. Here are the best ones to try.

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Photo: <a href="http://www.stocksy.com" target="_blank" rel="noopener noreferrer">Stocksy</a>/Guille Faingold

If Your Fitness-Focused New Year’s Resolution Isn’t Working, Try These 5 Expert-Backed Tactics

New Year's resolution not working out for you? Don't stress. Try these five New Year's resolution alternatives backed by experts.

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Photo: Stocksy/ZQZ Studio

4 Beginner Treadmill Workouts for When It’s Too Cold to Get Your Steps Outside

Can't get your steps in outside? Don't worry: Try one of these expert-backed beginner treadmill workouts instead.

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Photo: Stocksy/Bo Bo