If you deliberately want to increase the thickness of chest muscles, the most classic training method is barbell bench press or dumbbell bench press.

Followed by the instrument sitting posture to push the chest. Among them, barbell bench press (wide grip) is the most effective method.

Don't hold it narrowly. If you hold it very narrowly, it will be aimed at the triceps brachii.

Next is push-ups,

Doing push-ups can increase the thickness of chest muscles, but it is limited, because the main test of doing push-ups is the weight of one's own weight. Unless the back is loaded, it is difficult to achieve sufficient stimulation of the chest muscles.

Dumbbell birds mainly aim at the muscles inside the pectoral muscle, that is, the muscles on both sides of the pectoral muscle groove, so that the muscle separation inside the pectoral muscle is high. Of course, it is also very effective for increasing the thickness of chest muscles. When I say flying birds, I mean lying on my back. Don't sit on the bird, the bird mainly aims at the upper part of the pectoral muscle.

Good luck ~ ~ ~ ~ ~ ~