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

---

Etymology

Origin of interval training

First recorded in 1955–60

Example Sentences

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

High-intensity interval training can help build endurance and raise blood oxygen levels.

From Seattle Times • Nov. 25, 2022