there are high level youth sports who do not treat their child athletes this way at least in europe. i have never ever seen such behavior at elite youth track practice. sometimes in weightlifting but those coaches are far and few between there. never in judo. i wonder if the fact that high level training in wag has to start before puberty hits is related to this issue since in every other youth elite sport you do not start the hardcore work before age 14/15 (for the girls) or 15/16 (for the boys) since there is just no point before all the strength is there.