p90x quick workout

Is there anyone here that does Turbo Jam?

I have been doing P90X for a couple of years now, just recently I decided to add the Turbo Jam workout to it. Hoping to get better and quicker results with my abs.
I have only tried it about 4 times, but I notice my knees are hurting.
Am I doing something wrong?

I would love to chat or e-mail with someone who does this workout!

Thanks!

I use to do it but slacked off a few yrs now. I want to start again. I use to love it. I did see results after a couple of weeks. I use to wear good shoes and that is something that helped my knees.

P90X Workout Facility and GUN SHOW