First, in the stimulation of muscle fibers, we pay attention to the longer the stretching time, the tighter the extrusion, and form the best stimulation for muscles. Just like in bench press, when the dumbbell is slowly lowered, the elbow should be lowered to the lowest point as far as possible, thus completing the maximum elongation of the pectoral muscle fiber, which is beyond the reach of barbells. Similarly, when doing the dumbbell flying bird action, hold the dumbbell with both hands, fully squeeze the chest, and give more stimulation to the pectoralis major. Through dumbbell training, the effect of stretching and squeezing is sufficient, which not only stimulates the pectoralis major, but also gives the pectoralis major enough potential development space.
Second, from the nature of the equipment, dumbbells are completely free equipment. The advantage of free equipment is that while exercising pectoralis major, more auxiliary muscle groups can participate in the exercise, so that the trained chest will be fuller and more coordinated. Accessory muscles play an important role in chest training. The development of auxiliary muscles limits the recommended maximum weight to a certain extent, and dumbbells are the best choice for training auxiliary muscles such as pectoralis major.
Third, although dumbbells have obvious advantages in muscle training, the difficulty of dumbbell training lies in the difficulty of mastering the standard level of movements. After all, it is not as easy to use as some fixed instruments, so dumbbell training pays attention to the quality of movement, and gradually increasing the load on the basis of the quality standard of movement is the most correct method.