I can't really see a reason for a Standardbred racing barn to train something like that but you never know I guess. Maybe she is just revealing her sense of humour for me...
It could just be her sense of humour lol, Mitchell plays with his feed buckets and anything not tied down within his reach. He stands on them like podiums, kicks them around, picks them up in his mouth and runs at the other horses with them, throws them around... You have no idea how many flexible feed buckets he has ripped to shreds lol
Could you teach her to long line maybe? It would build up some muscles without having her straining to do circles all the time plus it adds variety, don't know about your horse, but when mine gets bored he gets naughty.
Or inhand walk her around cones or something like a slalom? To teach her to bend around things but slowly? I dunno, I don't deal with youngsters
R.I.P ~ Bubbles - 25yo tb mare - 13.04.2011 ~ 8:30am ~ passed away naturally and peacefully in my arms