He thinks pro football players are sissies
During an October 12, 2016, campaign rally in Lakeland, Florida, a woman in the crowd fainted, presumably because of the heat. This prompted Trump to wax poetic on the superior mettle of his supporters compared to professional football players:
"That woman was out cold, and now she’s coming back. See, we don’t go by these new, and very much softer, NFL rules. Concussions—‘Oh, oh, got a little ding on the head? No, no, you can’t play for the rest of the season’—our people are tough."
Of course, it’s painfully obvious that no amount of brain damage has ever stopped anyone from attending a Trump rally, but that hardly makes his supporters tougher than NFL players.
It’s true that the NFL is now much more circumspect about its players’ welfare when it comes to concussions—because of all the suicides, nerve cell damage, chronic memory loss, and other sissy stuff. And Trump loves to boast about how tough older generations of Americans—and by extension himself—used to be back when America was so great that athletes didn’t care if their brains were half-melted gelato, but it’s not like current players are begging to be sidelined just because they have bone spurs in their heels or want to attend Wharton.