|It doesn't look like this on me.|
I ended up buying that device pictured to the right. I feel positively 19th-century in it. All that is missing are the whalebone and laces, I believe.
Whoops! Don't Google for images of "corsets" - it gets weird pretty quickly.
I bet I could do these exercises, too, if I didn't have this spare tire around my middle. Who does this chick think she is, anyway, showing off like that?