I am embarrassed to ask this, but I hear this expression all the time, and never really understood what it is. I understand what Spring Training is, but what goes on in Extended Spring Training?

I assume normal conditioning takes place, as well as working on skills and fundamentals, etc. But what about games? Are they playing intrasquad games? Are they playing against other teams holding extended spring training?

How many players are currently in extended spring training? Can I find a list of what players are in extended spring training? Are there any websites that give coverage of what is going on in extended spring training?

Sorry for the questions, but I am curious.