Well, when I was in Boy Scouts and had to earn the Sports Merit badge, many years ago, I had to participate in a team sport and an individual sport. I was not a sports person. I joined a bowling league and a chess team and used those. Not sure that’s allowed today.
Great question! I cheated and looked up the definition. Turns out: there need to be rules and, generally, it should be possible to be done for fun by the so inclined. Interesting. By that standard, I’d say that experimental dancing is closer to art than to sports.
TIL sports is when there are rules but people still are having fun.
Another way of figuring this out is by looking at the etymology:
Early 15c., “pleasant pastime,” shortening of disport “activity that offers amusement or relaxation; entertainment, fun” (c. 1300), also “a pastime or game; flirtation; pleasure taken in such activity” (late 14c.), from Anglo-French disport, Old French desport, deport “pleasure, enjoyment, delight; solace, consolation; favor, privilege,” related to desporter, deporter “to divert, amuse, please, play” (see sport (v.)), also compare disport (n.).
from sport | Etymology of sport by etymonline
This might seem that our understanding of sport as athletics is more recent. Maybe a result of commercialisation? Makes for excitement, storytelling, and pretty pictures - and ads in between. In the old description, sports appear to fit quite well into the general idea of “leisure class” pastimes. So Rock Paper Scissors was a go! Certainly, this is not the 15th century, so a more modern understanding is useful, but I think it’s always interesting to investigate where things came from. Lovely random topic!
Also - just the right question to be raised and discussed by the geek squad.
Personally I would probably break it down to recreational versus professional. Professional sports are anything that has a professional organization develop around it. Recreational sports could be almost anything I suppose though there would be some overlap with hobbies. Is knitting or cross-stitch a sport? How about computer programming? Doing tabletop puzzles? Suduko? Crosswords? It seems like there can be no limits if people find it fun and challenging.