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Orangetheory Fitness class
Man Out of Breath
Man sprinting up bleacher stairs

How Often Should You Really Do HIIT Workouts?

That balls-to-the-wall routine may not be all it’s cracked up to be.
Make Your Workout More Intense 11K

13 Ways to Make Lifting Weights More Effective

It's official: You're never going to be bored in the weight room again.
Running Faster 34K

25 Ways to Run Faster—Stat

Feel the need for speed?
7 Minute Workout: Wall Sit

The 7-Minute HIIT Workout Challenge

Fun and done in less than 10 minutes.
Workout Playlist: Interval Run 1K
Home Workout: Total-Body HIIT

A No-Excuses HIIT Workout (It’s Only 20 Minutes!)

This routine is so efficient you'll work your whole body in a fraction of the time.
Man Stretching Before a Run 7K

17 Science-Backed Ways to Totally Crush Cardio Workouts

Treadmill not (necessarily) required.
Moves to Start Tabata - Greatist 12K

9 Must-Try Moves to Get Started With Tabata

Master these super-effective bodyweight moves.
How to Keep Burning Calories When Your Workout Is Over

How to Keep Burning Calories When Your Workout Is Over

Sound like science fiction? Think again.
Is Tabata an Effective Workout? 2K

The 4-Minute Workout: Is Tabata Training Effective?

It involves short bursts of intense exercise and has some serious fitness benefits.
Circuits, Supersets, and Intervals
Best HIIT Workouts on YouTube 3K

The Best Free Interval Workout Videos on YouTube

If you can't make it to a gym for some HIIT sessions, these videos are the next best thing.
Smart Ways to Be More Productive at the Gym 3K

17 Smart Ways to Be More Productive at the Gym

Never waste time aimlessly wandering between free weights and cardio machines again.
Young Woman Running Stairs 18K
Intervals vs. Inclines on a Treadmill

Which Is Better on a Treadmill: Incline or Speed?

The answer all depends on your goal.
Grokker 30-Minute HIIT Video 11K

The 30-Minute HIIT Home Workout

Get stronger—and more sweaty—than you ever thought possible in just half an hour.
HIIT Workout Feature 3K

The 15-Minute HIIT Workout That'll Build Strength—Fast

Work every muscle in your body with this speedy bodyweight circuit.
What Is 10-20-30 Training? 9K
30-Minute Bodyweight Circuit 9K

A 30-Minute Strength and Cardio Circuit to Challenge Your Entire Body

This bodyweight-only workout is super intense and targets every major muscle group.
Bodyweight Exercise: Mountain Climber 12K

How to Interval Train at Every Level

Make the most of every HIIT workout with these tips and effective routines for any fitness level.
Interval Training Lunges 1K
Grokker Kettlebell Workout 2K