Pilates work they are really great if you do them right, it is doing them right that is usually the problem. Windsor actually does them a little too fast, and if you do them a bit slower you get a bit more benifit from them. It should be a 4 count to do any pilate exercise. Those who do pilates right do enjoy some great benifits, as they are very controled and work the muscle, but you got to work at it, just like any other exercise, the claimes Winsor makes about being able to see results quicker then any other workout is a bit of a stretch. But most paticents that need to strengthen their core before surgery are given those to do because they are very good at strengthing. Like the one you lay on your back on the floor, you stretch your arms over your head, legs out and only about an inch away from each other, and you slowly roll up to where your arms are stretch out over your legs and your your back is straight. Kind of like a full sit up, but your legs are flat on the ground, and your suppose to only use your stomach muscles to get up or hold yourself in that postion also when coming up your hands start to lower from being straight above your head, to where they come down until they are shoulder level and when they are shoulder level you should be all the way up and back stright. Then when you lower your self back down, it's all stomach, you curve yoru spine and your roll down vetebray by vertebra. The slower you go the more work your stomach does, and then you end back up in starting position.
Try that one and see if you like it, I'm not sure if it's on the windsor Accelerated Pilates or not, but it's a great Pilates exercise for the stomach and back. Also during that exercise you want to squeeze internally like when you really have to go pee, but your trying to hold it, and your really use the pelvic muscles, try doing that as well, but do two or three before that step as it's a whole different ball game then your normal type of sit up.
Kit