Found this on a Reddit thread asking if anybody had participated on The Floor:
"The total filing schedule was about a week long, filming 1-2 episodes per day. We had to bring in duplicate outfits and they would wash them for us in between episodes. Sadly not filmed at the same pace as airing, standing on that floor for 8-10 hours was rough!"
I bet it was rough! And there were a number of older people there. I'm 69 and can walk for miles but I can't stand for more than 10 minutes, so I guess I'm out!