Hamstring Muscle Injury
The hamstring muscles are a group of three muscles located at the back of the leg and are responsible for extending (straightening) the hip and flexing (bending) the knee. A hamstring strain is a common injury and occurs when an over contraction of the hamstrings is applied while in a stretched position. Typically the strain, or tearing of the muscle fibres, occurs at the junction of the muscle and tendon. Hamstring strains present as a pulling or popping sensation at the back of the thigh following a forceful knee extension movement.