Oh, it's the class! Yeah, the original class I was gonna take was a long day on the bike, too - Anybody would be saddle sore after a day that long. My fellow instructor has taken a bunch of them, though, and she said there's Hours spent on how to properly adjust bikes and such.

Ugh on the anatomy, etc - it's fascinating stuff, I'm always asking my favorite yoga instructor what muscle hurts and why, etc. But none of it is really Essential for teaching classes. On the other hand it'll be useful for your personal trainer training! And diagnosing your own aches and pains and form-changes, etc.