Swedish for "speed play", a type of loosely structured interval training for runners, cyclists, and in-line skaters. It combines anaerobic segments with aerobic ones. Said to build strength and speed. (also relieves boredom).
A type of running workout in in which an athlete plays with his or her pace by whim.
A Swedish term meaning speed play. A type of workout which allows the runner while on a continuous run to use fast, moderate, or slow periods of running alternated as desired by the runner. This workout is both aerobic and anaerobic.