sleepybo,

Rest does not mean sitting and doing nothing. Quiet rest means doing activities that are not stressful. No cardio, no cramming for exams, none of the activities that cause the body to release stress hormones or the waste products caused by physical effort. The brain needs a good chemical/nutritional/metabolic environment.

Studies show that multi-tasking is detrimental to good brain health. And the study was done with normal people, no PCS subjects.

So, rest means no stress. Many thrive on the adrenaline and such of pushing the limits.

The Buffalo protocol suggests rest for 6 weeks or until head aches and other symptoms have cleared, then slowly introduce exercise that does not cause head aches or other symptoms to manifest.

There are other injuries that accompany concussions that also need to be addressed.