Today was a good day to return to judo because it was all footsweeps, which are frustrating because they're timing-centric and I have a tough time with them, but they also do not use up as much energy. And that is probably a good reason for older people with bad conditioning to try to get better at them.
I still got tired during all-footsweep randori, though. Four rounds, and I had to take a break. I think I landed one footsweep during that whole time.
Sadly, someone messed up his knee tonight. I always go in all braced up and do not fight off falls very hard in attempt to reduce the chance of injury, but things can still happen, even if they don't happen very often. Someone can accidentally hit you on the side of the knee in a certain way, and there it'll go.
He is a fairly young guy, though, so he has good chances at a good recovery, I'd guess. We walked him to his car, and I noticed that the floor of the passenger seat was entire covered in empty takeout coffee cups. Classic young guy stuff!