I was amazed at the number of muscles that little tool with his short stack, to mobilized in my body ... the first time, "ouch !!!" (What if little movement, and so many aches ??? !!!) My physiotherapist told me it's because I have more than 50 years and gave me some advice, drink more of water, to a progressive training. I am very happy with muscular action in areas that I was not working with my current activities. This is a good way to strengthen a curve and a figure in my case having a "good nature" and having managed to preserve a minimum of form (cardio = heart shape + 67 beats / minute, weight: 58 kg for 1m64), setting overall value of my silhouette - with the exercises shown in the attached document, is rewarding. There has been optimized, visible to the naked eye (torso and arms), after three weeks practically all working day.