“Fartlek” is Swedish for speed play—and that’s exactly what this workout is all about. Instead of rigid intervals, fartleks blend steady running with bursts of faster effort. Think of it as adding little surges into your regular run.

Run at your normal comfortable pace, then pick up the speed for a short stretch—maybe 30 seconds, maybe up to 2 minutes—before easing back to an easy jog. Repeat this pattern throughout your run. There’s no set distance or pace; the goal is to keep it playful and a little different each time.

Why We Do Them

• Builds speed and endurance together
• Improves pacing awareness (learning the difference between “a little faster” and “too fast”)
• Keeps training fun and flexible

How to Try It

• If you like structure: surge for 30–60 seconds, jog for 1–2 minutes, repeat 6–8 times.
• If you like freedom: use landmarks—mailboxes, hydro poles, intersections—to decide when to speed up and slow down.
• Keep the surges controlled: not all-out sprints, just quicker than your easy pace. One rep can be a little faster, the next one a little slower.
  

The key is in the name: play. Don’t worry about exact times or distances—just add some variety to your run and have fun with it.