None of the various DVDs of workouts are shot start to finish without a break, the film industry does not work that way. If you watch carefully you will note minor discrepancies from scene to scene as the previous poster noted. I am sure that the personnel in the videos are carefully selected for their fitness, athletic ability and overall attractiveness. While they most certainly workout it is most likely not with JM since they are paid performers and not her clients. For a better woman trainer check out the workouts from Rachael Cosgrove, she is a certified personal trainer and not an actor in a TV show.
It is called WORK-ing out for a reason.
I said getting fit was simple, I did not say it was easy.
Cardio burns calories, strength work burns fat.
Eat well to lose weight, exercise to get fit
You can not build a six pack using twelve packs
Often when we seek a magic bullet for fitness we end up shooting ourselves in the foot.
"I think calories are little germs in food that all moms are afraid of" Dennis the Menace