Requires the greatest degree of fitness or skill?
All the answers you are likely to get is what the person likes best. There is no objective criteria.
I play tennis and in terms of athleticism its by far the best sport. I also enjoy playing football, the real one not the stupid american version.
College Football, without a doubt. Those kids play with heart, and the atmosphere is phenomenal.
Women chasing.
to watch football, to play basketball
swiming is good all body get in shape