I'm just going to speak very quickly, and I'll let Mark and Cora respond in more detail.
You know, there's the saying “if you build it, they will come”. That's true to a certain degree. I was just in Little Rock, Arkansas, last week, and they had this lovely trail behind the hotel where I was. It was called the wellness walkway. I was there for three nights. I went running three times. I was out for about 45 minutes each time. I saw three people in total in over two hours of being out there running.
So building the infrastructure and having it there does things to a certain degree, but it's not the whole picture. Getting people to actually change their behaviours is a whole other issue altogether.