Dr. Geller says he, personally, doesn’t do dips because they irritate the internal part of the shoulders. The body is not mechanically adapted to pushing against things that are behind it. Dips are an example. They feel unnatural and cause needless stress on the shoulders. Many people with even minor shoulder issues avoid them. If, however, you decide to take a chance, proper form is crucial to prevent injuries. Don’t let the shoulders go forward and don’t shrug them. They have to be just below the elbows, not any lower, as you dip down.