I’m talking about the sport that the average athlete would be absolutely the worst at performing. While I’m not world class by any stretch, I can sprint 100 meters, dribble and shoot a basketball, dive into a pool, can presumably shoot a rifle (never tried), etc. But there is not a single gymnastics move that I could possibly do. I don’t even think I can walk across a balance beam without falling off. So I nominate Gymnastics as the most difficult Olympic sport.
Most of us over a week couldn’t complete the men’s road race course. So there’s difficult physically and technically difficult. I also suspect that some sports are much more difficult than they appear. It’s doubtful you’d last two seconds against even an amateur judoist (what are they called?
I also think that with a weeks skilled training you could be taught to do some rudimentary vault or balance beam routine.
Cycling? I’ve done 200 miles in a weekend a few times. The road race is about 150, I think; might be able to do that in a day, if I could get up the hills.