(KPRC) Hamstring injuries are common and can happen to anyone during physical activity.
"The hamstring muscle is the large muscle group on the back of the thigh," said Patrick McCulloch with Houston Methodist Hospital.
McCulloch said doctors can grade the injury by looking at an MRI.
"Grade one is a very mild injury and that's where there will some soreness and some stiffness there, but the athlete generally remains day-to-day," he said.
Recovery means stretching and gradually going back to normal activity.
Grades two and three are more serious.
"You actually have some tearing of the muscle fibers and a little bit more bleeding," said McCulloch.
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