A little more of adrenaline
There are fun sports, sports for passion and then there are extreme sports. While the first is an occasional thing, the second is more of a dedicated nature that is practiced by those for whom sports activities are something that cannot be avoided. Wherever they go and whatever time they wake up, its practioners are dedicated to their chosen sport.
The third lot is followed by those few people for whom the above is kid stuff. They prefer something that will challenge them; physically, as well as mentally. They can’t wait to get off the changing room benches and be out there, doing what they do the best.

