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High-Intensity Interval Training
This Total-Body HIIT Workout Will Get You Sweating In Under 5 Minutes
It will be the longest, but most #worthit 5 minutes of your life
Intense At-Home Exercises That Boost Your Heart Rate and Calorie Burn
Trainer Kaisa Keranen shows you how to break a sweat, fast.
Why Do We Love Torturously Tough Workouts So Much?
These fitness classes push your brain and body to the max.
Sculpt Your Legs and Abs In 4 Minutes Flat
Four moves, four minutes, and all your effort
The Killer Push-Up/Plyo Workout That Only Takes 4 Minutes
Courtesy of #fitspo trainer @KaisaFit
The HIIT Workout That Maximizes Your Afterburn
Sweat smarter, not harder
This HIIT Workout Burns Fat and Builds Muscle Like Crazy
Crank your metabolism
A HIIT Workout Like You've Never Done Before
And you thought regular HIIT was hard
This Is the Best Way to Exercise to Boost Your Energy
Too much exercise will wear you down and sap your energy, but too little makes you weak and tired. Here's what you should be doing at the gym to skyrocket your energy levels.
How Does Meditation Fit In with HIIT?
It's no longer one or the other—now you can get your dose of zen along with a heart rate-boosting sweat session.
Work Out Like An Australian with This Total-Body Toning Circuit
Fast and fun: that's the workout mantra from Down Under.
Can You Really Work Out for 1 Minute Instead of 45?! New Study Says Yes
The secret to shaping up involves more effort than time
This Could Be the Secret to Your Best HIIT Workout Ever
Your HIIT workout may be missing a key element, and it has nothing to do with how much you sweat.
4 Fat-Burning Tabata Moves Carrie Underwood Swears By
We've got an exclusive Tabata workout from personal trainer Erin Oprea's new book, <em>The 4x4 Diet.</em>
The Downside to High-Intensity Sprint Training
A new study says explosive sprint training can cause serious damage, putting you at risk for certain diseases and even cancer.
The Fast, Full-Body Circuit Workout to Boost Your Heart Rate
Get the work done, fast.
Your 7-Minute Fat-Blasting HIIT Workout
No time? With this quickie workout, there's no excuse!
30-Day Challenge: Heart Rate-Boosting HIIT Workout
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.