From here on I am going to be putting any use of the Jillian Michaels 30-day Shred DVD in the 'circuits' box of my training table. I gave it a go last night and discovered that the first workout (and I assume all three on the disc) is very much a short sharp circuit workout. It was good and certainly had me breathing hard at times, the mix of exercises was very good and logical to follow. In many ways it suffers from many of the usual exercise video drawbacks, but there are plenty of positives to help look beyond those. It seems simple and has an obvious progression, so I hope to stick with it for a fair while.