Letters
Cumulative effects of soccer heading are not fully known
BMJ 2003; 327 doi: https://doi.org/10.1136/bmj.327.7424.1168 (Published 13 November 2003) Cite this as: BMJ 2003;327:1168
- Rosanne S Naunheim (Naunheir@msnotes.wustl.edu), associate professor,
- John Standeven, engineer, human performance laboratory,
- Philip Bayly, professor of mechanical engineering
- Division of Emergency Medicine, Box 8072, Washington University School of Medicine, 660 South Euclid, St Louis, MO 63110, USA
- Department of Neurosurgery, Box 8057, Washington University School of Medicine
- 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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