this has changed. At a lot of places in the harder rotations (surgery, inpatient IM, OB) you can be working 80 hours per week, including multiple overnights, and may get only 4 weekend days off a month, during which you are likely going to be needing to study for the shelf. But it isn't per se hard because the role for med students are often fairly easy. You need to come in, pre round, make nice with the patients, present patients and various assigned topics to the attendings, get pimped by the attendings and otherwise serve as a distraction for the attendings on rounds so the residents can finish up their work. Then the rest of the day, the med students "help" the residents get t he daily work done, and hopefully see what the younger residents have to do each day, since this will be you in a few years. If you do a good job, a resident may throw you a bone and let you do a cool procedure. If you seem like you don't want to be there, you probably get scutted out or sent off to do "get out of my hair" type projects, maybe a few extra DREs, and end up with a weaker evaluation at the end. 90% of the job is showing up with a modicum of enthusiasm, ready to roll up your sleeves and get to work. You are going to need to show up earlier than the interns in many cases to pre round, and to make sure you know what you need to present to the attendings -- it will take you a lot longer than someone who has been doing it every day for the whole year. But if you have a Gung ho, can do attitude, most rotations are pretty painless, just a lot of hours. If you whine about how you are working more hours than the residents, or that none of this matters because you plan to go into (insert some different specialty here), it can be painful for you. Generally, if you are good with the attendings, good with the patients, and mildly helpful to the residents, you do fine.