What is the circumference of the shoulder and arm called?

The circumference of the shoulder and arm is called the upper arm circumference.

The circumference of the shoulder and arm is called the upper arm circumference, which is the horizontal circumference at the thickest part of the biceps brachii of the upper arm when the upper limb hangs naturally.

For rigorous analysis and evaluation of fitness level, shoulder circumference, chest circumference, waist circumference, hip circumference, leg circumference, height, etc. should be measured comprehensively. But it is difficult to obtain this data in large quantities. Although the error is large when measuring fitness level through upper arm circumference, the data is easy to obtain. By setting reasonable sampling conditions, as long as the amount of data is large enough, upper arm circumference can still indirectly evaluate fitness level.

According to statistics: if the upper arm circumference is greater than 35cm, it is already at a very high level.

Level of upper arm circumference:

An upper arm circumference exceeding 45cm is basically the ceiling for amateur fitness enthusiasts. Except for a few talented people, others cannot touch this circumference.

In the 1980s, Stallone's "First Blood" series caused a sensation in China because of his approximately 45cm arms. At that time, the arms of extremely heavy manual laborers in China were far less than 45cm. It seems incredible now that you can dominate with 45cm arms.

For technical athletes, the upper arm circumference is greater than 45cm (after degreasing), which is a very high level. In a large gym, being a head coach is completely convincing.