Increasingly, doctors are placing breast implants over not under the muscle for women who are thinner, very active and athletic, to minimize a problem called distortion when the implants move around. We address this issue in our book; some doctors, however, say that positioning implants over the muscle gives a more unnatural look. If you are a weight lifter, boxer or very athletic, thinner woman considering implants, this is an important issue to discuss with your plastic surgeon.