I’m completely with Kate on this one, having been a Nurse and Army Medic.
It is absolutely amazing what punishment the human body can take and survive, yet the most minor thing can finish you off.
One of the most pleasureable things about nursing, is when you see this mangled heap of a body being brought into A&E, then sometime later, to see them walking out of hospital with a big grin on their faces.
I also was a member of the St John Ambulance and provided medical cover at all sorts of events, from garden fetes to m/cycle or car racing to drag racing and stock cars and football matches.
The human body is an amazing piece of work, you only get one in this life, look after it.