Hi Nate-
I wasn't told of any particular limitations (but then I also wasn't told how often to test my INR, what foods to stay away from, etc. . . .) so I got most of my info from Dr Google. So I can't be of much help about what limitations we
should have!!
However I can add my experience, which has shown me that I'm not the delicate little about-to-bleed-to-death-any-moment flower that I was led to believe. Two instances:
1) I got cracked HARD in the head by my kayak which got picked up by a wave and hurled at me; it was a sickening crunch and a huge lump and I had no choice but to paddle 1/2 hour back to the cars, and then it was a further hour before I got to the hospital, where they were not concerned about the warfarin issue at all.
2) I fall off my mountain bike a lot. I am a terrible rider. I've had numerous cuts and bruises and have lived to fall off another day. I really thought I wouldn't be able to ride again but that's clearly not the case!
The guideline I go by now is not to get so far out in the bush that it would take over half an hour to get medical attention. But overall, I'm just really not worried. As for softball and volleyball, I can't see why they would be an issue, even if you got beaned by a softball it would have nothing like the force of what I've done to myself and worst case you're a lot closer to medical help than I am in the Australian bush
(My INR is 3.0-3.5).
My diagnosis - go forth and live your life. Maybe don't take up knife juggling.