Agree, some programs are more intense than others. My residency had no call free months except for ED and Peds ED which were, obviously, shift work. Inpatient months (ward [in my intern year], PICU, NICU, Newborn nursery) were q3-4, i.e. Wed/Sat or Thur/Sun (in my last two years ward had a weird version of a night float system so you worked anywhere between, at least, 72-78 hours depending on what shift and in what role you were working). Ideally outpatient was supposed to be 4 calls/mo, but it was not uncommon for it to be 5-6 calls and occasionally, some people got 7-8 calls in an outpatient month. People were in at 0600 on ward and NICU and were supposed to be checking out at 4, but sometimes stuff happens. At our facility Peds was pretty well matched with the worst of the specialties for "grueling-ness" (probably JUST behind OB/GYN and Surgery about in that order). But there are many "friendlier" programs, I know.