I never saw the program, Sounds similar to my niece in the states though
She is kick arse at Karate... One belt from black at 14 , Winning full contact comps etc etc , Even weapons etc ( I dont know much about it)
But been pushed so hard with training she just woke up about 2 months ago and decided she has had enough of it and quit, Such a shame ... Not for her I back what ever she wants but such a shame that she must of felt so much was demanded from her she didnt enjoy it anymore to the point she must of hated it to quit.