This varies from person to person, mainly related to heredity, in other words, it has a lot to do with congenital conditions.

The pectoral muscle in the large muscle group and the biceps muscle in the small muscle group are the easiest to shape. If the congenital conditions are good, scientific and systematic nutrition is trained, and there is a fitness coach to guide you, you can have a clear shape in two or three months.

Thank you~