Although the deltoid muscle is wide, its thickness is not enough, that is, the middle bundle of deltoid muscle should be strengthened. The deltoid muscle should be peach-shaped after training, but yours can't be seen yet.

The lateral head and long head of triceps brachii are not obvious enough, so you can't see the horseshoe-shaped triceps brachii.

Brachial II is fine, but I feel a little thick sebum. My fat content is 8%, and I can see the blood vessels on the second humerus clearly.

Practice dumbbell side lift in deltoid muscle and dig out the shape of deltoid muscle.

In the third section of humerus, practice the pressing, flexion and extension of the head and upper arm, and strengthen the lateral head and long head.

Brachial II continues to strengthen the girth, and properly practice the lines with small weight and multiple times.