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.
An ACL injury -- or other ligament injury -- is sometimes hard to diagnose. Symptoms of a knee ligament injury are: 1  Pain, often sudden and severe. 2  A loud pop or snap during the injury. 3  Swelling. 4  A feeling of looseness in the joint. 5  Inability to put weight on the point without pain. 6  1.here are four ligaments in the knee that are prone to injury: 1  Mentioned above, the anterior cruciate ligament (ACL) is one of the two major ligaments in the knee. 2  It connects the thigh bone to the shin bone in the knee.