10 minutes - then it made a noise that made me think the floor was opening up to swallow me and smelled like burning rubber. Boo. I did not give up though, I did Jillian last night after I got the kiddos in bed. I started over at level 1. I can definitely feel it! I also decided to break in a new pair of heels today which makes my muscles scream at me even more. Good decision. I have started unscrewing the cover to the motor, so I will let you know if I can figure out what is wrong with her. My kids interrupted my engineering last night, they needed dinner - I guess they're under the impression I am responsible for that? I kid, I kid.