This is mainly to practice chest muscles. If there is no equipment to do push-ups, it is a general exercise method. If you have dumbbells, lying on a bench, doing supine, pushing up and down with dumbbells is more conducive to muscle growth than using barbells, because it can stimulate muscles extensively and deeply. You can also do multi-angle bird exercises with dumbbells to develop all parts of the chest muscles. A good practice method is to do a set of dumbbell bench press exercises immediately after finishing a set of dumbbell flying birds. This kind of exercise is not only effective, but also can reduce the burden on shoulders and avoid sports injuries. If you don't know the name, you can go to Baidu and search for the bird movement map on bodybuilding.