High-Intensity Interval Training
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HIIT is really all it's cracked up to be—but slow jogs can further your fitness goals too, says new research.
Blast 500 calories and torch major fat with this crazy-effective routine that switches off between quick-but-killer cardio sprints and total-body strength moves.
Their trainer shares the squad's favorite high intensity interval training moves to stay strong, sculpted, and energized.
HIIT? Yoga? Strength Training? Find out what's going to be big come January.
Tackle fitness problems head on with expert tips on how to turn an exercise you can't stand into one you love.
Science discovers why Kenyans are so fast. And yes, you can learn the superpower too!
Killing yourself at the gym? Use your time right and 60 seconds might be enough to improve your endurance and fitness.
Get more bang for your exercise buck by learning how to do strength training intervals.
The biggest trend in fitness may be setting you up for a plateau.
The Instagram sensation's high intensity circuits for arms and abs provide a sweat-inducing workout plus major results—fast.