Oh definitely! I train all the time, I try to do 4 nights a week. I'm better at it in the offseason than I am during the season, because my body gets beat up and it's hard to convince myself to train when I'm sore.

It's just that ultimate is so stressful to my body that it overwhelms the rest of what I do.

I'm glad to talk your ear off about training methods, crossfit and tabatas, but this is probably not the right place for it. DIY gyms are kind of hacker though.