Fartlek training is a variation of the variable pace method, where the athlete alternates between different speeds throughout a workout. The term "Fartlek" comes from Swedish, meaning "speed play," and emphasizes a mix of continuous running with bursts of faster speeds.
Unlike structured interval training, Fartlek training is less rigid and allows the athlete to adjust the intensity based on how they feel, making it more flexible and adaptable. This method helps improve both aerobic and anaerobic fitness by challenging the body to adapt to various paces.
Fartlek training can be done on any type of terrain, making it suitable for runners, cyclists, and other endurance athletes. It enhances speed, stamina, and mental toughness, as it requires athletes to manage their energy and adjust their effort during the workout. The continuous variation in pace also helps break the monotony of regular training, making it more enjoyable and effective.