This question was originally posted on Quora.com and was answered by David Chan, MD from UCLA, Stanford Oncology Fellowship Several years ago, the entering class average age at UCLA was 26–27. Do the math. No a handful of years will make no difference in a lifelong career if you are doing what you are passionate about. I know a number of surgeons who operated with skill and expertise into their mid and late 70s. Other surgeons had to retire early due to disability from neck, spine and hand wear and tear issues. So proper body position while operating, maintaining optimal weight and regular exercise will help with a career which does require physical capability and some degree of fitness. Source