Hamstringstraininjuryisoneofmostprevalentnoncontactinjuriesinsportsthatinvolvehigh-speedrunning,suchassprinting,soccer,andrugby.~1Inordertooptimizepreventionstrategiesandinjuryrehabilitation,studieshavebeenconductedtounderstandhamstringfunctionduringsprinting.~(2–4)However,differenceshavelongexistedintheliteratureastothecauseofhamstringstraininjuries.Oneofthemostcontroversial