There's a lot of standing in one place that happens during med school third year clerkships. Some of it is understandable, like on surgery rotations, but for the life of me, I can understand why I had to stand for 4-5 hours straight during my medicine rotations.
At the university hospital, rounds would start at 8AM, and we'd walk down the hall over the next four hours, discussing each patient. Some teams would round for six hours. Six hours of essentially standing in place, discussing patients.
I'm sure there's some educational reason why this would be done, but by the end of it, all I could focus on was how much my feet hurt.