Gwyneth writes in her newsletter GOOP:
Many of you may already know of my passion for the Tracy Anderson Method and my investment in it. She has kicked my formerly sagging ass into shape and I will be forever grateful. This week, Tracy shares with us a little arm series that I did everyday preparing for Iron Man and that I take on the road. She just made it home-made style for me, lo fi. But it's good. Especially for the batwing problem. Also, some of her dedicated clients talk about why they love her as much as I do. She has some brand new DVD's that I have been doing in my hotel room on location and which I highly recommend.
Tracy was also Madonna's trainer until last fall, when the two had a dramatic falling out. Below you can watch a video of Tracy doing some calorie-burning pelvic thrusts to a club track by Keri Hilson.WATCH: