Microtrauma is term for minor injuries.
Baseline is assessments of preformance before any injury occurs.
Overuse injuries are caused by repetitive trauma to a specific part of the body.
Critical injury means that it's serious and a life threatening injury.
So, loss of consciousness would definitely be classified as a Critical Injury.
Hope this helps. :)
First question - all of the above
Second question - puberty ( not quite sure )
It causes your heart rate to go up, and for you to sweat