There is a seam in the middle of my chest, and there is the same seam on both sides where I am sandwiched between the side chest and the outer chest. Looking down, it looks like a figure of eight. I u

There is a seam in the middle of my chest, and there is the same seam on both sides where I am sandwiched between the side chest and the outer chest. Looking down, it looks like a figure of eight. I usually practice bench press, bird. underneath Is there an obvious "watershed" in muscles after exercise? This is normal and necessary. Look at your chest muscles. You haven't practiced yet, especially your upper chest. Non-professionals can also achieve the effect of "knife and axe" through exercise. Find a professional gym and a professional coach to teach you standard movements. Get twice the result with half the effort. As for the professional coach who teaches movements. There are many advantages to arranging courses. The most frequently asked sentence by netizens is that after practicing for a period of time, the body muscle strength is enough, but the finger grip strength is not enough. Can't catch the instrument. Wait, it must be taught by a professional coach.