I worked 50-60 hrs a week during my first 3 years of undergrad. Most of the hours were on the weekend and evenings, although on of my jobs was between classes on some weekdays. I took between 12-14 credit hours. At first, I tried to take 15-16 but I wasn't doing that great so I cut down. Senior year I only worked 30, which was much better. I was sick all the time the whole time I was in college. I didn't sleep much, and I ate like crap. In a way though, I think I'm glad to know I can survive like that. During my junior year, my health was better because I was more used to it and had my priorities straight so I was eating well and exercising. Now that I'm on rotations, I pretty much know what my body can handle and what it can't. I wouldn't wish that load on anyone, but who am I to guess what someone else can handle. I'm not going to lie and say it was easy though. To quote someone else, "Damn near killed me". My sentiments exactly.