A relatively common injury involving one of the four quadriceps muscles (usually the rectus femoris because it crosses two joints, the hip and knee). It is usually caused by overextension, e.g. when kicking) or overuse. Those most at risk are poorly conditioned athletes taking part in sports, such as badminton, squash, soccer, and basketball, which require explosive stop-start actions. Typically, the leg hurts when touched and feels sore when the quadriceps contracts during activities such as walking upstairs, running uphill, or doing squats. The cornerstone of treatment is rest, ice, compression, and elevation (see RICE). See also muscle strain.
Subjects: Sports and Exercise Medicine.