Most theories as to why our breasts stay plump surround the idea that our breasts are to human males what red butt cheeks are to ape males looking to mate. So, grab a ruler and measure this distance on you. Strengthen the muscles in your chest with weight lifting. Do pushups East west boobs strengthen the muscles in your arms, chest and back. Strengthen your pectoral, shoulder, and triceps muscles with chest presses. Stand straight and hold a weight East west boobs your hand with your palm facing up.