I recently read that strenuous exercise can cause blood clots in older people.  I do a brisk treadmill walk daily.  Should I be concerned?
D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D015444:Exercise / Q000502:physiology*; D006801:Humans; D005082:Physical Exertion; D012307:Risk Factors; D054556:Venous Thromboembolism / Q000209:etiology*