What do you consider sports? Would you consider skateboarding a sport or a hobby? Would you consider horseback-riding a fun activity? What are your opinions?
A sport is generally something that has National Governing Body and that has regular National and International Competitions. I don't consider Dance and Cheerleading as a Sport but some people do -~-
Sport is introduced in many levels, BUT, at the end of the day a sport is to be active, that means moving some part of your body to achieve the task that is asked of you.
In which case, picking up a cup and putting it back down can be a sport as long as they called it 'the up and down cup championships' or something.
Darts is a sport, Football, Cricket, Tennis, Weight Lifting, Horse Back Riding, Rolling down a hill with some Cheese.. you name it, it's a sport.
They are catagorised into Sports and Hobbies by the people that actually take part, Darts is considered a sport now, but when less people were doing it, it was called a hobby.
Same with anything really, the more people do it, and the more money made from something it then becomes a sport.