After returning home from a short trip to New York last month, I got a cold or virus of some sort and my heart rate went completely out of control. On one of my runs my HR monitor indicated I ran for miles with a heart rate of over 200. At one point it actually showed a reading of 249. This, I know, is absolutely impossible, but it made me worry enough to go to the doctor. My doctor sent me to get a bunch of tests done including a stress test and some blood tests....
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