Seasoned runners have long used interval training, alternating between sprints and jogs, to boost their endurance. However, high-intensity interval training (HIIT) didn’t go mainstream until about a decade ago, when research started to prove that intervals could deliver the biggest health benefits in lesser time. Over the past years, HIIT became an increasingly popular workout for people who want to advance their workout.
HIIT routines are comprised of alternating short bursts (about 30 seconds) of intense activity with longer intervals (about one to two minutes) of milder activity. What differentiates HIIT from the steady-state and continuous type of training, like jogging or wal…
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