@esaterman You had a lot of questions in your reply. I hope I caught them all. To the extent that I can remember the answers or find answers on forms I may still have, here they are:
* When the big group physicals were done at my school, they were done on weekends or summer days because the gym, the training room, and the nurses' office and the hallways that connected them, as well as the cafeteria and library which were used for waiting areas for parents, would be booked for that for the whole day. That also ensured privacy as we walked through the halls.
* Yes, the times we were allowed to wear gym shorts between stations were not too bad. We were not permitted to wear anything else, but shorts are fine. The times we were given a towel, we had to be naked under the towel. At the state health center, we had a robe to wear while waiting and between stations/rooms and we were naked under that.
* The decision about undressing, I guess, was made by the staff who came in to do it. There was some link to age of boys, because if you needed a physical in kindergarten through 5th grade, you just took off your shirt and shoes. After that, you were required to undress.
* The time they asked for athletic supporters (jockstraps) we were told to wear one or bring one with us. This caused a stir among some parents and was not something they continued doing.
* Undressing was done in a locker room, then you walked to the training room for the first couple of stations, then to the main gym for several, then to the nurses' office for the last few. In most stations, being bare-chested was enough. The number of stations requiring full nudity depended in part on your sports. If you were in wrestling or boxing, you were weighed nude. If you were in any contact sport, all the muscular/skeletal/movement and coordination tests were done nude. When you got to the last few stations in the nurses' office, ALL of those were nude. That would include Tanner stage assessment and the final once-over from the doctor who would sign off that you had completed your full physical. So, of the maybe 15-20 separate stations, 4-5 were fully nude.
* Most stations had some element of privacy. The weighing/measuring, the EKG, and the coordination tests usually took in 2 or 3 boys at a time. The rest was pretty much one at a time. The final stations in the nurses' office, you would go in with 5 or 6 other boys at a time but would be alone when having Tanner done and when seeing the final doctor.
* Coaches helped out only in the sign-up area and in the changing room. Most of the staff supervising were from outside the school and were connected to the health center.
* There were hundreds of boys on these days, all ages. You would be told to arrive no later than a certain time, and when you were done, you were done. Usually there was some waiting, especially if you got there later.
* Yes, there was always a urine test.
* Chest and wrist/ankle Xrays were ONLY done when we went to the big state health department building. Never at school.
* I think there was some randomness with regards to having to go to the state health building, but I think there were certain ages where they preferred you to go there. As there was usually still a mix of ages, I am not totally sure. But I think they wanted you to go there at ages 11, 13, and 16, at least. I am not totally sure, though.
* It was embarrassing both at school and at the health center. Maybe in different ways, but neither was better than the other.
* Parents were permitted to be present if they wanted to be. At the school, they tended to only do their part and let you go through the exam without them. At the health center, there was a little more expected of parents in terms of speaking with the doctors in your presence.
* I do not know what caused all of the parent complaints. I know that some parents complained about the jockstrap, which I think was an attempt to mitigate the nudity in stations that normally expected nudity, but it didn't work as intended. The only other complaint I am aware of, was a parent who, during the physical, had an issue with Tanner stage assessment being mandatory for contact sports. I only know this because I was near the kid in question and was a friend of his and I overheard it. Apparently, his parents had asked a staff person to be allowed to talk to their son. The staff person came to get him from the rotation and said his parents wanted to speak with him before he did the final stations and that they could meet with him in an area near the entrance. He was just in a towel and he asked if he could put on some clothes before meeting his parents and he was told no, he'd have to stay like that because there wasnt time for him to go all the way back downstairs to the lockeroom, get dressed, meet with his parents, then go back and undress again to finish the physical. So, I think that caused some upset.