Hamstring tears often occur during dynamic sports. These injuries occur more commonly in an eccentric direction ( the hamstring is taken from a shortened position to a lengthened position against resistance) i.e. sprinting. As the leg moves under the body in the swing phase of running the hamstring is rapidly lengthened and this requires the hamstring to work hard to slow the lower leg down. Sometimes the load of lower leg exceees the ability of the hamstring to withstand it. This results in a tearing of the tissue. These injuries are normally felt immediately and there is localised tenderness with pain felt during active movements and in a stretched position. To recover from these injuries generally requires 2-4 weeks with an emphasis on flexibility, re-active training and eccentric strength. Reviewing the length tension relationships of the muscles around the hip is also important but particularly in recurrent cases.