TomTom heart-rate strap

Johanni
Johanni Registered Users Posts: 1
New Traveler
edited January 24 in TomTom Sports
How do I know my heartrate monitor (strap) is synced to
my watch? I switched the function on on my watch. But the readings doesnt seem accurate. Ive been literally almost dying and it drops down to 65 bbp- which is impossible since its crossfit???

Comments

  • tfarabaugh
    tfarabaugh Posts: 17,004
     Superuser
    It is dropping because it is CrossFit. . Low HR is often seen in rowing, cycling and weight lifting (which is a primary component of CrossFit). Any time you do an activity that squeezes or tenses the forearms (like the pull stroke in rowing, bearing down on your handlebars in cycling, or virtually any weight lifting move) you are squeezing the blood vessels the watch is reading, so it sees this as a reduced pulse. It is not that the watch is having a problem reading your pulse; it is that your pulse at the wrist has actually dropped because you are temporarily cutting off blood flow to the vessels it is reading. I have experienced this with every optical HR I have used, including a Mio and a Scosche unit. For these sorts of activities you are better off using a chest strap synced to the watch if getting a more exact reading is important to you.

    I hope this helped answer your question. If so, please mark it as a solution so others can look for it if they have the same question.