• support@fourthfrontier.com
  • I am new. Will the device record without having my cell phone on and near by? In short, can I record then have the device dump the data to my phone via the Frontier X app later?

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  • Super impressed with the device because it’s alerted me to a prolonged QTc interval which is a ‘new finding’ to me – not sure if it’s related to low RHR (43) or something else.

    On the tech side, it looks as if I cannot record an activity (on device or on device relayed to phone) AND connect (as HRM) to my Garmin? Is this correct – must I…Read More

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  • I am a recreational marathoner, aged 54.
    Used Frontier X today during cycling, after a long time. It has been about 10.5 months since HA and my training for marathons is about 85% back to where it used to be pre HA. Raced for 2 hours in a hot and humid afternoon slot, in a 12 hours relay run event at Stadium Run on 29th Aug. It felt normal to…Read More

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  • I had exercise induced aflutter about 4 years ago with rate sitting at 140 long after the workout ended. It progressed to chronic. Tried all the meds which made exercise difficult. Had it ablated. All was good until this past year when I noted the rate going over 200 with similar feelings to the aflutter before. If I back off it normalizes…Read More

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  • Hi there, i have had mu frontier x for some months now. My doc said i have a congenital cardiac condition (heart artery grew incorrctly placed when my heart developed in the womb). Their suggestion was to do only moderate exercise. However i have been a competative endurance runner for over 40 yrs with no knowledge of any heart issue. I have set a…Read More

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