Hamstring Strains: Classification and Management.

This article, titled "Hamstring Strains: Classification and Management," provides information on hamstring strain injuries (HSIs) in sports medicine and rehabilitation. The hamstring muscle complex (HMC) consists of several muscles that play a role in extending the hip and flexing the knee. HSIs are commonly "sprint-type" injuries that occur during high-speed running, affecting the proximal long head of the biceps femoris muscle. "Stretch-type" HSIs can also occur with end-range hip flexion and knee extension, typically involving the proximal semimembranosus tendon. The article discusses the grading of HSIs and outlines a 3-phase protocol for nonoperative treatment of Grade I and II HSIs. Grade III HSIs may require surgical repair, with a goal of returning to sport within 4 to 6 months postoperatively. [Extracted from the article]