If you had continuous strong vibrations, shaking or bumps over a reasonably long period, there can be cumulative injury similar to the sub-concussive impacts see by football players as they clash helmets off the line ever 45 second in a game or even more often during a practice.

The physical exertion also put a blood pressure and pulse strain on sensitive tissues.

And, the waste products of metabolism can flood the bloodstream. Any time a physical effort cause fatigue, a recovering concussed brain will be stressed.

The Buffalo Protocol suggests keeping pulse rate 10% below any symptomatic levels during recovery.

The important part of recovery is to minimize or moderate activities that cause an increase in symptoms. The brain recovers best when it is symptoms free or at a lower level of symptoms. Activities that raise the symptom level often cause a setback. Gains in recovery can be lost by pushing too hard.

But, once you have pushed too hard, the only thing you can do is get back on a moderated activity level so recovery can continue. Stressing over "I screwed up and wrecked my recovery" is counter to recovery. Anxiety kills recovery progress.