"Discipline and ambition"? You mean....PRIVILEGE?! Read some idiot article linked here yesterday about how doctors are so privileged in terms of education and $ and that's why we are almost always thin and/or in shape. It reminded me of working 80+ hours a week in med school and still finding time to make it to the gym 3 times weekly, and all the times I stood in line at the hospital caf to get a coffee with milk for a dollar while the fat nurses were ordering their 30-oz PSLs and paying 5 bucks. Indeed, how privileged I am to be fit.