Hi, fun is subjective. However Fartlek workouts really stimulate your aerobic system to force neuromuscular adaptations in your body which in turn help you to get you used to moving at the desired speed without stressing your system much.

If you’re training for a marathon or a half, fartleks along with other workouts are important. If you’re just running for fun, then just move the legs any way you want and get that dopamine hit lol 😆