I had been running and wasn't able to bring up my heart rate. Everything else was fine: I had slept well, eat enough, drink enough. I just couldn't get my heartbeat and -pressure up so that I had enough oxygen in my blood. This happens almost once a week now. Does anyone has a good idea what to check or test?

closed as off topic by hims056, Dor Cohen, Spinner, wax eagle, user527 Jun 22 '13 at 15:54

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