I have been doing pilates for the past 3 years and so bought this dvd in the hope it would help me keep a certain level of flexibility and strength as bump grew and I was no longer able to lie on my back.Initially I was very frustrated by the slow pace of the exercises and felt the gaps between one exercise and another was too long with too much explanation and commentary. However, once I reached around 7months this slower pace was an absolute God-send as I really needed the time during and between exercises to shift myself and bump around and concentrate on breathing (which is really helpful to focus on in the run-up to labour).No, you will not work up a sweat in any way, but you are not supposed to in pilates- pilates is about control, not struggle. The proof is in the pudding- I have had literally ZERO back pain throughout my entire pregnancy, my feet or ankles havn't swollen and I've maintained my posture and strength. I always feel relaxed and strong after doing this routine.I bought the pilates for mums dvd aswell when I bought this and intend to do this as soon as possible after baby but I did do the warm up from the mums dvd in my earlier stage of pregnancy as it was more challenging but once I got bigger the warm up from the pregnancy dvd was just perfect.