I'm a certified childrens aerobics instructor, but I also have a background in part time dance and gym teaching.
The other day I was coaching my 8-year-old daughter and her two teammates in her three-girl group. I got the girls to start off doing stretches and warm-ups when one of them let out a fart which made them all start to laugh, getting our lesson sidetracked. Later on when we were in the middle of the routine I could smell a really stinky smell and concluded that one of the girls must have farted again, interrupting the good progress we had made that lesson. I had to stop practice, because they preceded to start arguing over who'd done it.
I kind of gave-up at this point and just sent them all of to the potty for a break because they were getting silly. I had to spray the gym out with air freshener, because it really was starting to smell, and I waited for the girls to come back. We have regular talks about dietary needs at class as well and what to eat before, at and after training days, so why are these girls always so gassy?