Interval running involves running at a fast pace for a set time followed by jogging at a slower pace for a set time, and so on.
This style of running aims to maximize your aerobic fitness while minimizing your overall time spent exercising.
Running fast, then slow, then fast again, isn’t just something you did in gym class (who was too tired to sprint the whole race? This running method — known as interval running — is actually a super beneficial workout.