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Get ready to #sweatwithkayla: The creato...
Press play to start working your thighs from every angle.
Get lean, tight, and totally bikini-ready with a full-body workout video from the creator of the crazy-effective Insanity program.
Grab a set of dumbbells for an efficient strength training circuit that creates lean muscle you can flaunt in your bikini.
Score the bikini-worthy body of a surfer with a 20-minute fat-burning circuit designed to recreate a wave rider's moves (no actual surfboard required!).
Slim, trim, and tone with the first installment in the Summer Shape-Up series from the man behind P90X.
The superstar creator of the 21 Day Fix shows you how to jack up plyo moves to deliver full-body results—fast.
Our fitness editor visited the UFC Gym in Manhattan for an empowering kickboxing routine.
In need of a quick mood boost? Try these easy poses to increase endorphins.
PMSing? Check out this video for easy poses that will relieve headaches, cramps, fatigue, lower back pain, and uncomfortable cramps.
Grab your legwarmers, because Jane Fonda is back.