I have seen the term sub-concussive thrown around quite often when browsing the forum and researching online. I can't really find any statistics regarding what amount of g forces is actually considered a sub-concussive impact.

For example:

Today I was sitting next to my buddy on a couch, and he gave me a hard shove, my whole body shifted quickly. Is this considered a sub-concussive impact?

What about heading a soccer ball?


Just curious - thanks for any responses.