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Cumulative effects of soccer heading are not fully known

BMJ 2003; 327 doi: (Published 13 November 2003) Cite this as: BMJ 2003;327:1168
  1. Rosanne S Naunheim (, associate professor,
  2. John Standeven, engineer, human performance laboratory,
  3. Philip Bayly, professor of mechanical engineering
  1. Division of Emergency Medicine, Box 8072, Washington University School of Medicine, 660 South Euclid, St Louis, MO 63110, USA
  2. Department of Neurosurgery, Box 8057, Washington University School of Medicine
  3. Box 1185, Washington University, 1 Brookings Drive, St Louis, MO 63130, USA

    EDITOR—McCrory says in his editorial that heading a soccer ball results in head accelerations of less than 10 g (or less than 1000 rad/s2), whereas the minimum values for the development of sports related concussions are 40-60 g (or 3500-5000 rad/s2),1 with a reference to an article published by our group.

    To mix or equate linear acceleration measured in g (1 g = 9.8 m/s2) with angular acceleration …

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