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HIIT

High-Intensity Interval Training

This 20-Minute HIIT Tempo Workout Plays with Speed In an Insane New Way

Alternating between painfully slow reps and explosive bursts is the workout upgrade you didn't know you needed.

This 10-Minute Circuit Might Be the Hardest Cardio Workout You Ever Do

All you need is a box or step—and a lot of determination.

The F45 Training HIIT Workout You Can Do In Any Gym

Prepare to sweat your *peach emoji* off

How Self-Care Is Carving a Place In the Fitness Industry

More gyms and fitness studios are starting to prioritize overall well-being.

The 10-Minute Low-Impact HIIT Workout for Beginners

FYI, low-impact doesn't necessarily mean easy.

How to Boost Your Metabolism Using Just a Pair of Dumbbells

This inspired approach to intervals will have you racing for recovery time.

Do the Risks of HIIT Outweigh the Benefits?

Some experts are taking issue with America's favorite workout.

7 Cardio HIIT Exercises That Burn Fat and Reduce Stress

This hard AF workout is worth the sweat.

Common CrossFit Mistakes Most Beginners Make (and How to Avoid Them)

If you want to make WODs a part of your fitness life, then listen up.

This Tabata-Strength Circuit Will Help Boost Your Metabolism

You've never gotten such a good workout in under 30 minutes.

What's the Difference Between HIIT and Tabata?

Test your fitness brain power and learn some workout tricks, too.

Agility Cone Drills That'll Skyrocket Your Speed (and Calorie Burn)

Nothing beats cone drills for boosting coordination while burning big calories

The Strength HIIT Workout with Triple the Body Benefits

This triple-threat workout from celeb trainer Chase Weber will refresh your idea of how hard HIIT can be.

The Total-Body Tabata Circuit Workout to Send Your Body Into Overdrive

This workout will crush you in the best way possible.

Do This HIIT Workout On Water to Seriously Activate Your Abs

Steal these core-busting pool moves and do at home.

The Cooler Workout That Will Wow *Everyone* at Your BBQ

Then take a beer out of it when you're done.

Celeb Trainer Lacey Stone Will Help You Sculpt a Rock-Hard Body

Steal this 45-minute workout from the "Revenge Body with Khloé Kardashian" trainer.

The Tough Plyometric Training Challenge Your Legs Will Love to Hate

Turn up the burnt by getting off your feet—and into the air.