The trapezius muscle is a normal human tissue, the trapezius muscle enlargement may be caused by prolonged low head work, obesity and other reasons. 1. Prolonged head down: prolonged head down will make the neck muscles, including the trapezius muscle, continue to be in a state of tension, if not properly rest and relaxation, in the long run will lead to the corresponding muscle stiffness, thickening. 2. Obesity: A prolonged high-calorie diet will cause fat to accumulate, and the trapezius muscle will become thicker as a result. Exercises for the obliques mainly include pull-ups, push-ups, lifting dumbbells and so on. It is recommended to perform these exercises under professional supervision. If you are not satisfied with the appearance of your obliques, it is advisable to start from the cause of their enlargement, improve the related bad habits and exercise actively.