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Hamstrings are most susceptible to injury during the late swing phase of sprinting
  1. Elizabeth S Chumanov1,
  2. Anthony G Schache2,
  3. Bryan C Heiderscheit1,
  4. Darryl G Thelen3
  1. 1Department of Orthopedics and Rehabilitation, University of Wisconsin, Madison, Wisconsin, USA
  2. 2Department of Mechanical Engineering, University of Melbourne, Victoria, Australia
  3. 3Department of Mechanical Engineering, University of Wisconsin, Madison, Wisconsin, USA
  1. Correspondence to Elizabeth S Chumanov, Department of Orthopedics and Rehabilitation, University of Wisconsin, Madison, Wisconsin 53706, USA; easchmerr{at}wisc.edu

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It is well recognised that the hamstrings are susceptible to acute strain injury during high-speed running. However, the particular phase of the sprinting gait cycle at which hamstring injury occurs remains a debated topic. Video footage and athlete anecdotes have contributed to the discussion, but do not provide sufficient temporal resolution to fully answer the question. In this paper, we briefly review: (A) biomechanical data obtained from healthy athletes; (B) case studies of injuries during biomechanical experiments; and (C) clinical outcomes from intervention studies. We believe all of these support the premise that late swing phase is the likely time when the biarticular hamstrings are most vulnerable to injury.

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