How do you define a Sport?

[philster]

What is a sport and what isn't a sport to you?

What ought to be considered a major sport and what ought to not be considered one?

For me I think it needs to require a lot of physical activity to be considered a sport.

Which would, nonetheless, count NASCAR as a sport ( happy, Sarah? ) because in that environment you do tend to have to have excellent senses to even compete. Your heartbeat goes crazy and you're having to keep track of everything that's going on. And in a racing car at the speeds they go in NASCAR races, it can get crazy.

I just consider it a boring sport to watch.

So how about you guys? What do you think?