A book that had been highly recommended to me for me "remake a belly" after pregnancy. And fortunately ... because at first if I found interesting theory, I also found dense and I struggled to continue. Finally, I started to test the exercises, saying "I know the principal, I will apply, then I will come back to the theory necessary to correct." And there, I was very surprised at the effectiveness of the method, sweetness (we spring without pain everywhere), the fun I had doing these exercises ... Another advantage of this book: the number of exercises. If you do not understand one of them, there are others to do the same muscles ... Useful! I therefore recommend this book to my turn! Note: There is a DVD featuring these exercises. Perhaps easier access for those who have trouble with the book?