Not sure about the gain...
... but there definitely was some pain.
For me. Just watching Mimi's stretching exercises made me feel a bit faint*
Sometimes I wonder if her ballet teacher is called Pol Pot. Or Attila. Or Idi Amin Dada. Or Margaret Thatcher.
* not really. The only thing that ever makes me feel faint is hunger, usually if I am more than 3.5 hours without eating a solid meal.