What is a Fartlek and What Should I Do One?

A fartlek is a training method that involves varying the pace and intensity of running throughout a workout. This approach helps to improve distance and stamina in running in several ways:

1. Increased Aerobic Capacity: Fartlek training helps to improve the body's ability to use oxygen during exercise, which is also known as aerobic capacity. This is because the varying pace and intensity of the workout challenges the body's cardiovascular system to work more efficiently, delivering oxygen and nutrients to the working muscles. Over time, this can help increase endurance and the distance that a runner can cover.

2. Improved Muscle Endurance: Fartlek training helps to improve muscle endurance by challenging the body to sustain a high level of effort for longer periods of time. This is because the intervals of high-intensity work interspersed with periods of lower intensity work challenge the muscles to work in different ways, which can help to increase their overall endurance.

3. Mental Toughness: Fartlek training is also helpful for improving mental toughness, which is an important aspect of distance running. The varying pace and intensity of the workout require the runner to stay focused and motivated, even when the going gets tough. This can help build the mental strength needed to push through fatigue and discomfort during long runs.