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interval training

American  
[in-ter-vuhl trey-ning] / ˈɪn tər vəl ˌtreɪ nɪŋ /

noun

  1. an exercise and training program in which each session consists of periods of intense exertion alternating with periods of rest or lighter exertion.


interval training British  

noun

  1. Also called: fartlek.  a method of athletic training using alternate sprinting and jogging

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of interval training

First recorded in 1955–60

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

His longtime business, Bootcamp H20 — fitness classes for adults held at private and public pools around L.A. — blended high-intensity interval training, circuit training, aerobics, plyometrics, strength training and endurance training.

From Los Angeles Times Jan. 1, 2026

Specifically, interval training enhances blood glucose control, which helps reduce the risk of developing type 2 diabetes.

From Science Daily Oct. 20, 2025

She also leads a program she created that involves nutrition, health and wellness education, running, and high-intensity interval training.

From Slate Oct. 15, 2024

In Lumin Fitness' darkened studio space in Dallas, Texas, LED screens line the walls from where AI personal trainers guide up to 14 gym goers at a time through personalised workouts or high-intensity interval training.

From BBC Jan. 3, 2024

The beauty of the fartlek is that, unlike in traditional high-intensity interval training workouts, walkers or runners don’t have to glue themselves to a watch or a fitness tracker to boost their muscular endurance.

From Seattle Times Oct. 4, 2022

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