Workouts
7 Things You Don't Realize Are Killing Your Knees

Nope, running isn't the only exercise that causes knee pain!

WORKOUTS

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Shape-Up for Summer with Tony Horton!

Slim, trim, and tone with the first installment in the Summer Shape-Up series from the man behind P90X.

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Master This Move: Swiss Ball Pike

Pick up a ball to recruit tons of tiny muscles and tone up all over!

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21 Lies You Tell Yourself to Justify Skipping the Gym

Fess up, ladies: Do a deep lunge for every one of these no-exercise lies you’ve told yourself!

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It's a Plank Off!

There might be other plank challenges out there, but only ours has fitness superstar Kira Stokes curating the moves—and she gets ab-firming, body-changing results fast!

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Get Guns Like Shaun T

Er, or maybe just a more toned top half. We've got the celeb trainer's most effective arm-strengthening exercises.

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Master This Move: Plyo Pushup

Tone your whole body, fire up fast twitch muscle fibers for fat burning, and look like a total badass in the gym.

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Get Flat Abs in 4 Weeks, No Crunches Required!

Blast off belly fat before beach season with an four-week workout routine that works your core to exhaustion.

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20 Legit Reasons to Love CrossFit

Find a box, schedule a WOD, set a new PR—and find out why CrossFit workouts are taking the fitness industry by storm.

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