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HIIT

High-Intensity Interval Training

Your 7-Minute Fat-Blasting HIIT Workout

No time? With this quickie workout, there's no excuse!

30 Days of Heart Rate-Boosting Moves from Hot Dudes

Go ahead, cheat on your regular workout.

The 30-Minute HIIT Workout to Beat Your Winter Slump

A quick workout that packs the punch you need to get out of your blistery weather-induced rut–and see major results!

Make Your Cardio Workouts Harder (Not Longer)

Try these trainer tricks for more burn in less time.

The No. 1 Reason Runners Should Be Cross Training on a Bicycle

Science says going for a spin might actually make you run even faster.

The 20-Minute Workout to Help You Get Fit, Get Toned, and Get On with Your Day

These big-bang moves target every muscle for an efficient firm-and-burn.

Jillian Michaels' Fat-Melting Bodyweight Workout

Get Jillian strong with body-transforming moves you can do right at home (Michaels swears by 'em!).

Surf-Inspired Exercises to Sculpt Lean Muscle

Forget the wet suit—you'll want to flaunt your toned figure in a bikini after incorporating these surf-inspired moves into your next sweat sesh.

How HIIT Fights Back Against High Fat Foods

Got a big meal coming up? Working out a certain way beforehand could leave you burning fat for hours and hours!

10-Minute Metabolic Conditioning Workout Plan

Burn fat fast with this exclusive metabolic conditioning routine inspired by MetCon3—one of Equinox's most popular classes.

The HIIT Workout that Tones in 30 Seconds

Start shedding fat in just 30 seconds with these fast-paced total body moves from Adam Rosante's book The 30-Second Body.

Why It's Okay to Work Out at a Lower Intensity

HIIT is really all it's cracked up to be—but slow jogs can further your fitness goals too, says new research.

Fat-Burning Tread Tabata Workout for the Bold and Fit

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.

The HIIT Workout the Indianapolis Colts Cheerleaders Swear By

Their trainer shares the squad's favorite high intensity interval training moves to stay strong, sculpted, and energized.

The 10 Biggest Fitness Trends for 2015

HIIT? Yoga? Strength Training? Find out what's going to be big come January.

4 Ways to Turn Your Fitness Weaknesses into Strengths

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 People Are So Fast

Science discovers why Kenyans are so fast. And yes, you can learn the superpower too!

A 1-Minute HIIT Burst Can Transform Your Workout!

Killing yourself at the gym? Use your time right and 60 seconds might be enough to improve your endurance and fitness.

A New Way to Do HIIT

Get more bang for your exercise buck by learning how to do strength training intervals.

Are You Overdoing Your HIIT Workouts?

The biggest trend in fitness may be setting you up for a plateau.

Exclusive HIIT Workout from Star Trainer Kayla Itsines

The Instagram sensation's high intensity circuits for arms and abs provide a sweat-inducing workout plus major results—fast.

Exhale's Core Fusion Extreme Workout

Steal these top moves from exhale spa's Core Fusion class that will get your heart pumping and leave you soaked in sweat.

HIIT It! 8-Minute Total-Body Workout

Boost your metabolism and start shedding fat—stat with this fast-paced, heart-pounding routine.

Lower-Body HIIT Workout

Tone your butt and thighs while blasting fat with this fast-paced plyometrics routine.

15-Minute Belly-Fat-Blaster Workout

Get a tighter tummy fast with this 2-in-1 combo of high-intensity interval training and waist-whittling exercises.

Your Best Exercise Routine Right Now

Use our handy flowchart to figure out what type of training is best for the time you have, your goals, and how your body feels.