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Old 03-04-2012, 05:21 AM
Mark in Idaho Mark in Idaho is offline
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Mark in Idaho Mark in Idaho is offline
Legendary
 
Join Date: Feb 2009
Location: Somewhere near here
Posts: 11,427
15 yr Member
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Studies show that collisions on the athletic field (football, rugby, soccer, etc) can cause 80 to 90 G forces and sometimes even more.

A simple foot plant can cause 60 Gs to the foot and ankle. The force radiating to the head can easily be 1/2 the foot plant so 30 plus G's.

The repetitive nature of running can cause quite a trauma to a sensitive brain.
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