Generally speaking, the left side is smaller than the right side, the left thigh muscle is smaller than the right side, the height of the left abdominal muscle is lower than the right side, and the left arm muscle is smaller than the right side. This is normal, only vocational training can develop left-right balance and bodybuilding muscles!

It is difficult to achieve symmetry in ordinary exercise. Trying to make the exercise intensity on the left side higher than that on the right side can make up for it a little, but it is difficult unless professional training is carried out.