general info:
on the subject of DVT - I read quite a bit about it, and discussed it with my doctor. He mentioned something that I was unaware of: blood clots can be caused by banging yourself (like in the leg in sports etc) He said that he has had to back off from the rigorous work he used to do in the riggings while sailing, just for that reason. I ain't no linebacker, so I'm not worried - but if you do bang yourself up a bit in the leg area, it may be something to keep an eye on with your doctor.