In this groundbreaking book, based on the 12-week fitness project , one of the world's largest and most successful public health projects, she will guide you step by step, giving you one simple guideline to follow each week. By the end of three months you will have transformed your habits in twelve crucial ways.The result? You ll find you have lost inches and have better sleep and energy levels, lesser acidity, bloating and sweet cravings and reduced PMS and period pain.