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 Problems and Injuries - Check Your Symptoms. Knee Problems and Injuries. Knee Problems and Injuries. Knee Problems and Injuries. Call 911 if a bone is poking through the skin. The hurt limb or joint looks odd, is a strange shape, or is out of its normal position. The skin over the site of an injury is broken. You have signs of nerve or blood vessel damage, such as: Numbness, tingling, or a pins-and-needles feeling.
Twisting the knee is a common cause of overstretched or torn ligaments of the knee. Symptoms of Torn ACL: The knee may give out suddenly when the ACL is torn and there may be a popping sound upon injury. Symptoms of a torn ACL include knee pain, swelling, stiffness, and bruising. Walking is painful and the knee feels instable.