If you look closely, you will find that even the chest muscles of some famous bodybuilders are not completely symmetrical. The main reason is that the gap between left and right arm strength in the early stage of training leads to different adequacy of left and right chest training. But with the extension of training time, under the correct training action, this difference will gradually become smaller. Because as the training time becomes longer, the growth of strength will become lagging behind. A remarkable feature of retraining is that the strength remains unchanged, and the increase of muscle mass will soon reach the extreme. So as long as you keep exercising, the small side of the chest muscle will gradually catch up with the big side, so the difference will tend to be minimized. Of course, under the premise of insisting on training, the strength is also growing, but the growth is relatively slow in the later period. Therefore, the gap between the left and right breasts is generally impossible to eliminate, but it just doesn't look obvious.

It has been suggested that I do not advocate unilateral exercises or training methods with different weights of the left and right barbells. Because one of the purposes of strength training is to balance the body, only holistic training can achieve this goal.