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.
Learn about causes of knee pain and the medications used in treatment. Associated symptoms and signs include swelling, joint redness, and knee weakness. Pinpoint your symptoms and signs with MedicineNet's Symptom Checker.