The main purpose of aerobics is not to lose weight, but to shape, that is to say, it can beautify your body curve (of course, it is acquired rather than born), such as aerobics; Riding a bike can exercise the legs and hips, and exercise the waist and abdomen less. Waist fat can be achieved by sit-ups. The specific method is to touch the outside of the left thigh with your right elbow when you get up, and the left elbow touches the outside of the right thigh, so that one left and one right count as a group. You can make the number of groups and exercise plan according to your own situation. But in general, good living habits and eating habits are the basis for you to keep fit, hehe.