Most physical injuries have a time period where you can play on it and be just fine, but you could also aggravate the existing injury, or injure something else as a result of your body over-compensating for the injury.

My question is:  What do the concussion tests actually ensure?  Can Rodgers pass all the tests while still having an increased risk of further damage or an additional concussion, which more rest could help?  Because if that's the case, then there's no way he should be starting.

On the other hand, if the tests are designed to tell you that he's as healthy as he ever will be, how do you keep him benched?  If the only way that another week of rest would help him is simply that it is one less week where 300 pound men will try to crush him, and he wants to play, is there really any justification to sit him?  At that point, you might as well force him into early retirement, because that risk will never diminish.

I'm just wondering if anyone out there knows more about this than I do, or if everyone is pretty much in the dark.