ExercisesRunning intervals

Running intervals

After a 5-minute easy warm-up, alternate hard efforts with easy recovery jogs or walks. Hard means you can only say a few words at a time.

CardioNo equipmentDifficulty 2 of 3
Two-panel demonstration of the running intervals, showing the start and finish positions
Start and finish positions

How to do it

After a 5-minute easy warm-up, alternate hard efforts with easy recovery jogs or walks. Hard means you can only say a few words at a time.

Muscles worked

Front
Back
  • quadsprimary
  • hamstrings
  • calves
  • glutes

Hover a muscle to find it on the figure. Dark green is the primary mover, lighter green is supporting work.

Other options in this pattern

How many sets should you do?

That depends on your goal, your ability, and how many days you train. Answer three questions and the builder works out your sets and reps, plus a full week around them.

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JM
Johnny Milaychev · Product manager and self-directed lifter, not a trainer or a clinician. Why that matters and where this guidance stops.
Reviewed 16 August 2026 · Exercise library v2.2