What gets said in the training room does not stay in the training room.
The other day an athletic trainer told me about a group of athletes who were complaining about a situation on their team. No need to go into more detail, but they’d be embarrassed to find out that I know what was said.
It turns out that athletic trainers aren’t your friends. If you wouldn’t want your coach to hear it, don’t say it in the training room.
And if you wouldn’t want your coach to hear it, consider not saying it at all, to anyone.