Fartlek

Fartlek, a Swedish word meaning "speed play," is a running training method that combines continuous running with varied bursts of faster pace or intensity. Unlike structured workouts, it’s spontaneous and adaptable, allowing runners to switch between slow, moderate, and fast paces based on how they feel or terrain. This technique improves both endurance and speed, making workouts more engaging and less monotonous. Essentially, it involves playful, unstructured intervals that push your limits in a natural, flexible way, helping you become a stronger, more versatile runner.