Beach volleyball is a popular outdoor sport in Germany with many women players clad in bikinis or going topless. An estimated eight million people worldwide play the game because of its many health benefits. Volleyball gives players a total body workout and strengthens the shoulders, legs, and abs.

"Beach volleyball, which requires more muscles to perform the same moves on sand as one would on a hard court, is an effective workout for track and field athletes too, strengthening ankles, calves, knees and hips," according to Margo Trott in FitLinxx.com.

While Khoury agrees that the game may be good for the body, he said the physical exertion of volleyball puts a strain on women's breasts. He warned that all the jumping and diving can cause the breasts to sag.

Khoury said he has seen many female volleyball players at his clinic who all have one thing in common: sagging boobs.

To avoid this fate, the surgeon said women can do two things: play less volleyball or buy a good sports bra. Khoury said this will limit the damage.