Hi ok i have a querey about my heart rate whilst training , my heart rate whilst training (spin bike in winter) when pushing at about 80% was reaching about 148 / 150 but for some reason all of a sudden my heart rate has dropped over the last 3 days down to about 130 and to get 150 i am really having to hammer it to get it up ,
Anyone know what causes this type of occurance , i do have an irregular heart beat but nothing major , cleared by a doctor , would this cause my polar monitor to be reading incorrectly or is this occurance an indication of something???