What effect do chest exercises have on breasts?

I enjoy working out, and I know that aerobics burns fat which will may cause your breasts to get slightly smaller, but what about the machines that target your chest area? How do they affect breasts? Should I do them (I want to be fit with as little reduction in my breast size as possible)

It is possible that you will lose some breast mass. You’ll gain muscle and muscle burns fat. No matter what exercise you will lose weight in your chest area.

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