HIIT

abbreviation or noun

ˈhit 

: a form of interval training that alternates very brief periods (such as 20 to 40 seconds) of intense exercise at maximum effort with periods (such as 15 to 30 seconds) of less intense exercise : high-intensity interval training

HIIT, or high-intensity interval training, is a training technique that requires you to perform quick, intense bursts of exercise, followed by short and active recovery periods.

—Sudhakar Jha

Examples of HIIT in a Sentence

Recent Examples on the Web

So, nix that step by building a home gym that makes squeezing in a HIIT class first thing in the morning, a treadmill run at lunch or a yoga session on the fly much more doable. —Sarah Sekula, USA Today, 17 May 2025

Currently, Austin operates an online fitness platform called Katie Austin On-Demand Studio, which offers online classes for dance cardio, at-home strength training, HIIT training, kickboxing, and Pilates and Barre. —Andy Frye, Forbes.com, 13 May 2025

Move it to your bicep with the additional bicep strap to get the best heart rate accuracy for high intensity workouts like HIIT classes. —Michael Sawh, Wired News, 13 May 2025

Try a High-Intensity Workout High-intensity workouts, such as high-intensity interval training (HIIT), involve brief, intense periods of heavy aerobic exercise followed by extended periods of lower-intensity work. —Mark Gurarie, Verywell Health, 1 May 2025

Word History

First Known Use

1994, in the meaning defined above