re. heavy breathing...
She not only does all of the work outs, she talks cheerfully through the whole thing.
It would be fascinating to see what she can really do. In other words, one of her "advanced" work outs that she can talk all the way through must be a low intermediate for her. In fact, now that I think about it, what if she designed a work out that was so intense, she was unable to talk through it? She could call it, "Death Valley." :<) just kidding, just kidding.