Great information! I KNEW some of those moves were wrong, and my body told me so! I am glad I always modified, or just didn't do them. That said...I just started doing a spin class after my Ball class on Tues, Thurs. New teacher, different verbage. Well, she wanted us (all two of us) to do push-ups on the bike...and get this-not TWO armed push ups, but ONE. You lean to the side on one side, then middle then the other side. WTH?!?

Needless to say, I just said no. I could just see my lower back tweaking from doing those. Pretty ridiculous. Then I see this thread today, making me say HA! My body knows what is right for it!

Thanks for all the info!