It's your selection.You do it eight instances and....well you get the point.This helps create additional muscle and sustain the muscle you at present have on a calorie restricted diet program.Your body adapts to the new levels of calories and will use muscle instead of fat for energy.Hence our weight increases so also the susceptibility to several life threatening ailments.Consider the consequences cautiously.Hence body fat calculation is the ideal approach to assess your fitness.Energy spent is less as we can do strenuous tasks by just pressing the button.