Callisthenic exercise works to tone and firm as the muscles are stretched and flexed like an elastic band. As the muscles are stretched and flexed, they become toned and firmed resulting in inch loss. Because your body weight is supported and does not have to fight against resistance, (gravity in calisthenics is resistance) muscles do not increase in bulk. Muscles acquire a sleek, toned look. Remarkably, you do not get sore, sweaty or tired. Muscle strength is gained through the use of isometrics while using the tables. The use of Slender You equipment is comparable to aqua exercise in that both types of exercise are body weight supporting causing no stress or strain on your body. You get the same results in an hour, as you do with seven hours in the gym.