Sports for several years (at home weight training) I practice LAFAY method over three years. I am fully satisfied with the results but the abs exos do not suit me, so I practice the crunch and basin statements. I have heard spoken by chance CARRIO Christophe and his books. Although took me to buy it. It is clear and very explicit. It's not all about why this or that practice exercise, it is equally interesting to know why and this book answers all the questions (even the ones we did were not even asked). At 35 now I do not think that impress the girls on the beach, I also aspire to age well in a "pain-body" (small nod to the second book by this author I bought) and Christophe CARRIO will help me.