During the last trimester when I was more uncomfortable, the exercises I did from this book helped me to relax. Since I was walking, sitting and sleeping differently (than before getting pregnant), the exercises in this book helped me to stretch muscles safely and also to meditate/relax tight muscles. This was extremely helpful during the last week of my pregnancy, since my baby was pinching my psiatic nerve in my lower back. A few exercises helped my body to better deal with this type of discomfort.