There are examples of running races dating back thousands of years. Running was one of the events in the original Olympic games... it hasn't changed much since. you go as fast as you can for a specific distance.

Marathons are run today that are based completely on an event that occurred in around 490 bc. So that is around 2800 years of not changing.

The Irish game of Hurling goes back quite a long way, several thousand years, as mentioned in this it is referred to in the Táin Bó Cúalnge from the Book of Leinster, which is the story of the ancient mythological Irish hero Cú Chullainn. This is the modern game.

Up the Banner...

What do you mean by "in it's current form"? For example, rugby has been playing international matches since 1871, but the rugby played at Raeburn Place back then is very different from what is played today, as the rules have been tinkered with many times in the intervening years.