Adjei, MD Patellofemoral stress syndrome (PFSS), also known as "runner's knee" or "jumper's knee," is a type of overuse injury that causes pain in the soft tissues and bone in the front of the knee.

Quadriceps atrophy is a commonly cited accompaniment to patellofemoral pain syndrome (PFPS), yet there is little valid, objective evidence for its existence. Objective: To investigate atrophy and ...