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The hamstrings are involved in a host of athletic motions that include running,1–3 jumping4 and kicking.5 6 Hamstring function is important to the performance of most sport-related activities, particularly when fast running is required.2 4–7 Injuries to the hamstring muscles compromise individual performance and team success in many sports.8–13 Awareness of risk factors for hamstring strain injury (HSI) is an important component of athlete load management, injury prevention and return to play decision-making post injury.14 15 Previous reviews of risk factors for injury have identified that older age and a history of HSI are commonly associated with a greater risk of future HSI.16–18
Prospective studies continue to examine a range of modifiable and non-modifiable factors to determine which are most associated with HSI.19–21 Hamstring strength can now be measured using novel field-based procedures,22 such as the Nordic hamstring exercise (NHE) test.23–25 The relationship between hamstring strength measured by these devices and HSI risk is not known.16 26 In a 2018 systematic review, isokinetic strength testing did not accurately predict risk of HSI.26 Whether an athlete’s training load, including various measures of running workload and match exposure, increase HSI risk is of interest.27–30
Given the significant body of new research, we updated our 2013 systematic review16 of risk factors for sport-related index and recurrent HSI.31 32.
More... Recalibrating the risk of hamstring strain injury - BJSM