I have read about deep vein thrombosis on long airplane rides. Although I am in fairly decent physical shape, it's my understanding that this can happen to healthy individuals as well. Various articles I've read state that certain stretching and exercising can help to alleviate some of these problems. However, many of the articles don't really give specifics as to what these stretches or exercises might be.
What stretches or exercises, either before, during or after the flight, can I perform to help prevent this condition? Obviously, confined space is an issue so something like burpees in the lavatory or sprints down the aisle aren't going to do.