I was discussing with one of my friends the idea that the hardest sports to be the best at are the poorest and cheapest sports.
1. Soccer - in the poorest countries in the world most villages still make soccer balls from tape and play soccer in the dirt.
2. Running - you can run anywhere. Maybe not track or road...but dirt roads are all over the world.
xc courses can be anywhere...even in the jungle.(which is why i think they should do marathons on dirt roads or fields) (im not starting a road/track/trail debate)
3. martial arts - especially wrestling.
Easiest Sports to achieve top level would be rich people sports?
Polo?
Figure skating?
Sailing?
Let me know what you think!