Now that summer flying weather is here, long cross country trips might be on your horizon—even if it is on an airline. DVTs or deep venous thrombosis are one of the unfortunate risk factors for long air travel and should be taken seriously.
DVTs are promoted by sitting for long periods of time, dehydration, injury to the legs (even small bruises), varicose veins and inactivity. They can be prevented by keeping hydrated (and not drinking alcohol if on an airliner), doing isometric exercises in your airplane (or walking around the cabin on big iron), wearing support socks and exercise before flights (like walking or elliptical machines).
Although the jury is still out on aspirin, I think it is a good preventive medication and I personally take it for long trips.
When using your own aircraft for a long cross country flight, remember that an extra stop or two can make all the difference in DVT prevention. Walking around during refueling or even from the airplane to the restroom will not only reduce your DVT risk, but make everyone on board more comfortable.