Spotly,
The link that Jordan gave you is interesting, but I'm thinking not directly applicable to your situation. Their research subjects seem to be taking coumadin for afib. Whereas you hint that you need to talk with your neurologist, which I can only assume means you had some sort of head injury/accident (clot in your brain, tia, stroke, etc). I'm just guessing but you should only pay attention to research articles that are relevant to your specific ailment since blood thinners such as coumadin have multiple uses.
Secondly, if you just got on coumadin you really shouldn't be doing too much until you can make sure you have a good baseline of your body being able to keep your INR in the therapeutic range. Hopefully that makes sense.
That is only the internal physiological issues so far...
Next, as some have alluded to, are traumatic injuries. Having your INR in the therapeutic range, (elevated for the normal person), puts you at a higher risk for hemorrhaging, both internally and externally. Knowledge of how to treat the external ones will be important. On the other hand, getting yourself to a hospital as quickly as possible for the internal ones will be more important.
I'll do some research when I go back to work next week.