Less for you than for the people you're operating on, that's for sure.
You may gain weight and suffer heart disease or diabetes. Many surgeons have been observed to gain a substantial amount of body fat during the course of their career. This could be caused by long hours at the office or hospital and not enough time exercising. If you go into this career, you may want to invest in a Shake Weight. We don't advise using it during surgery, however.