Runner's Knee/Jumper's Knee
Also known as patellar tendonitis, jumper’s knee is when inflammation occurs in the tendon that connects the kneecap to the shinbone. It is most commonly caused through the continuous motion of jumping or running, hence the nickname. Symptoms may include restricted range of motion in the knee, swelling, tenderness, and/or pain located behind the kneecap. For more information on patellar tendonitis, visit Mayo Clinic.