Practicing chest muscles may make the chest area look tighter, but it will not make the breast itself bigger. This is because pectoral muscle and breast tissue are two different structures, and practicing pectoral muscle will not have a direct impact on the breast itself.

Reducing fat does not necessarily lead to a smaller chest. When you lose fat, your body will burn fat, but your breast tissue may not decrease. However, if you lose fat instead of muscle, your body may become more compact, which may make your chest area look smaller.

It should be noted that everyone's body structure is unique, and the size of the chest will be different due to genetic, hormonal, age and other factors.