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

The fitness watch offers up to 11 days of battery life and tracks a range of workouts, including walking, running, cycling, HIIT, golf, and more. — Sheena Vasani, The Verge, 14 Nov. 2026

The gym is expansive by hotel standards, with cardio machines, strength-training equipment, and a packed schedule of daily classes ranging from yoga and barre to HIIT and spin. — Condé Nast, Condé Nast Traveler, 11 Nov. 2026

Anthony says that trendy workouts such as Pilates, HIIT, and Zone 2 training can be useful as long as the underlying training makes sense. — Laura Solla, Vogue, 3 Nov. 2026

Nothing says luxury wellness quite like taking a HIIT circuit class in an industrial art studio rented by the hour for a corporate team-building retreat. — Shamira Ibrahim, Vulture, 26 Oct. 2026

Word History

First Known Use

1994, in the meaning defined above