Originally Posted by Doge

Huh?
Risk? Those 3 are the least injured juniors (then) I know of.
You may be reading into this a bit too much.
A multi time Mr Olympia (World) bodybuilding champion had kids doing machines over free movement exactly to avoid injury.
He also trained some football kids, tennis kids etc.
Way less risk than the other kids that road/rode themselves into tendentious, and various other fatigue injuries.

I really don't get it. A day in the gym vs a day on the road and we are concerned about risk?
I'd have to look up cyclist gym deaths, but so far - I have not heard of any.