The sound stopped just halfway through for me. The first half was very good though.

Not so sure the opening should have been left out. I think I am fairly strong, but hurt my back by going right into roll up and roll over. Need some sort of a warm-up.

The only thing left out Connie was the hundred which we tried to tell you about in the description so you would know ahead of time... So Sorry to hear your back hurts. Traditionally all mat classes would start with the hundred and then proceed, as this one does, with the roll up and roll over. It may be a good idea to do a gentle warm up before you start any of the classes. Many of our classes do include additional movements to warm up in hopes to avoid what happened to you. I hope you feel better soon.