Getting better but I still trouble with reading numbers. However, I believe, looking at the data graphs, that this is the formula used to calculate in the study with the helmets that was discussed earlier in thread.

This is also why I mentioned geometry and so, proprioception.

I think if you read the qualatative data of my last link, it speaks of the variables and how difficult they would be to calculate. Most head injuries do not occur under measured circumstances.

These sort of figurings leave the viewer with a sense of spheres of likelihood rather than facts and certainties.

But one constant that all posters here can be sure of: the impact/force that caused their c/tbi.

It is good to know these spheres for developing protective wear for the arenas, or vehicle design or preventative measures...though often it is pure Outside Influences and little an individual can do to escape the hubris except persevere and seek balance.