The odd thing is, there are people who work in physically demanding fields (even a pharmacist who stands on his feet all day is demanding to me) and do it for 40 or more hours a week, so why would 20 hours feel so overwhelming, mentally and physically? Perhaps because I/we did it in addition to our normal jobs (and I sit at a desk all day and don't exercise like I should, which doesn't help, either).
Today, though, was the toughest for me. I did the 6:30 am Aikido class, the 7:30 to 9:00 judo class, then the 9 to 11 jodo class, took a half hour break and then did the 11:30 to 1pm Aikido class. Phew! I need a shower. And I think it's time to wash the gi!
Unfortunately, I rolled my left ankle while doing a little judo randori with Greg Ables Sensei, but I think it's okay. I kept going for the rest of the classes, but now that I'm home, it's a little tender.
The biggest casualty, however, is my brain. It's just fried. A lot of good information, in all arts, from all levels of participants. A good experience, though, that I was happy to be a part of.