Hamstring strain injury (HSI) has remained a problem for athletes across a range of sports that involve sprinting. In team sports such as soccer, HSI is responsible for more games lost than any other injury. Athletes with a history of HSI, or who are older, are at greater risk of injury. Although these risk factors cannot be controlled, there are other risk factors that can be addressed in the physical preparation of athletes. One risk factor is low hamstring strength, and it is common for strength and conditioning (S&C) coaches to prescribe hamstring strengthening exercises as part of an injury prevention program. The choice of exercises has become a controversial issue with practitioners debating the pros and cons of hip dominant or knee dominant exercises, as well as eccentric exercises (eg. Nordic) versus isometric exercises.