I get together and play once a week during the summer months with some of my coworkers. I'm not especially good, but I do get out and run around for an hour. And I do mean run around for an hour, Ultimate is supposed to be non-contact but it involves a lot of running just like basketball. Granted as the hour wears on, the running slows down, but I'm fine with that.
The first game of the season was last weekend and it went pretty well. My muscles were tired and a little sore the next day so I must have done something kinda healthy. I was also very happy that my muscles were less tired and sore than the same time last year, which is a sign that I'm in better shape than I used to be.