HIIT
abbreviation or noun
: 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
Sudhakar JhaExamples of HIIT in a Sentence
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Breathable mesh uppers allow for plenty of airflow to keep your feet cool on hot summer runs and sightseeing days alike, while the double lace lock keeps the tongue in place during active HIIT classes.
—Sophie Dodd, Travel + Leisure, 9 May 2026
He's shared his blood panels, sleep scores, HIIT workout protocol, heart rate, muscle oxygen saturation and myriad intricate biomarkers.
—Alyssa Goldberg, USA Today, 5 May 2026
The other days are cardio which are set up like HIIT classes.
—Holly Carter, PEOPLE, 8 Apr. 2026
What Researchers Found On average, both the HIIT and the moderate-intensity groups lost similar amounts of fat mass.
—Julia Sullivan, Health, 23 Feb. 2026
See All Example Sentences for HIIT
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Sophie Dodd, Travel + Leisure, 9 May 2026
He's shared his blood panels, sleep scores, HIIT workout protocol, heart rate, muscle oxygen saturation and myriad intricate biomarkers.
—Alyssa Goldberg, USA Today, 5 May 2026
The other days are cardio which are set up like HIIT classes.
—Holly Carter, PEOPLE, 8 Apr. 2026
What Researchers Found On average, both the HIIT and the moderate-intensity groups lost similar amounts of fat mass.
—Julia Sullivan, Health, 23 Feb. 2026
See All Example Sentences for HIIT
Cite this Entry
“HIIT.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/HIIT. Accessed 17 May. 2026.
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