When I lived in SoCal I did a lot of training at UC Irvine. Back when they were the L.A Rams, pre-season training camp was at UCI on the athletic fields next to the track.
One afternoon, I am doing mile repeats on the grass with three other guys. We finished about the same time the Rams were breaking practice for the day. As we begin our cool down, Jim Everett comes up and starts asking us about our workout. We tell him that we banged out 5 x Mile at 4:45 each and he replies, "Wow! How do you guys do that? That would kill me. I respect you guys 'cause that's gotta' hurt."
He wished us well and trotted off to the showers. He must have said something about it cause most of the Rams would cheer us on after that.