"Fartlek training" is an invigorating way to spruce up cardio days and speed up weight loss. This training method comes from Swedish Olympian and coach Gösta Holmér and appropriately translates ...

Fartlek training involves running at different speeds for intervals, but that’s kind of where the rules end. Much like HIIT, it’s up to you to decide how you break up your work/rest pattern.

Fartlek (Swedish for ‘speed play’) is one of the most common training sessions I use with my athletes. The history of fartlek training dates back over 80 years, when coaches and scientists ...