How can the muscles I practice be a little bigger and smaller than the muscles on my shoulders (the meat connecting my shoulders and neck)? What should I do? You can get extra points for a good answer.
This muscle is called trapezius muscle, which is usually exercised when you shrug your shoulders with heavy objects. Maybe when you are lifting weights, you will unconsciously have the habit of shrugging, and the stress will be uneven, which will gradually become bigger and smaller.
If you want to build strong muscles, you must master the correct fitness movements, otherwise the contorted movements will only cultivate contorted muscles.
People who usually exercise naturally hang down dumbbells with their hands, shrug their shoulders and lift them completely, train trapezius muscles, pay attention to uniform exertion and isolate trapezius muscles as much as possible, so as to get good results.