Bosun Higgs
N/A
I'm struggling to think of any sports, other than flying (Is flying a "Sport"?), which require qualifications. AFAIK unless you are on the public highway you don't even need a qualification for driving.
There are others - flying, motor racing, scuba - and they all have the same characteristics. Unlike ( say) athletics, they can be dangerous to the participant and they do require some mental skills / training. Others require licences - fishing and shooting for example.
But you do raise the interesting question of what is a sport. Is darts a sport? Or shooting? Or sailing? Are sports only activities that require physical fitness or athleticism? And what if the athleticism is on the part of an animal as in horse riding?
I was going to say that competition is the only common thread but even that isnt correct - where is the competition in some field sports?