Hi Amy,
I'm actually doing TJ right now along with Core Secrets. It's a great workout and it's really fun. Yes, it does work the Abs. Ab Jam is great, but you also get a lot of ab work doing the other workouts too. I'm hosting a Turbo Jam house party in nyc, even if you can't make it, you could be a virtual guest. If you give me your email, i can send you an invite and you can buy Turbo Jam for 30% off the regular price plus get express shipping. Anybody else who wants this offer just needs to give me your email address.
Thanks,
Ali