Wiktionary (0.00 / 0 votes) Rate this definition: fartlek (Noun) An athletic training technique, used especially in running, in which periods of intense effort alternate with periods of less strenuous effort in a continuous workout.
Knee injury facts. The knee is one of the most common body parts to be injured. Types of knee injuries include sprains, strains, bursitis, dislocations, fractures, meniscus tears, and overuse injuries.
Knee Pain Causes. What causes knee pain? Learn the top causes and symptoms of joint pain in the knee including arthritis, injuries and other conditions. Read More >>