• support@fourthfrontier.com
  • I saw many posts regarding the vaccine. I did two shots of Pfizer in may, exactly as instructed. I have HCM and my troponin levels went thru the roof and I was in the hospital in June. I was diagnosed with pericarditis. None of the doctors seem willing to admit that it was the vaccine. My HCM was under control and I had NEVER had any issues that…Read More

  • Hi everyone. I’m just after receiving my my frontier x. How do you know what my cardio strain is and the breathing one and heart rate limit? Thanks

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  • Noticing some pretty frequent abnormalities when I’m working pretty hard. In general, I’m a healthy, competitive cyclist who works out 2+ hours per day. These graphs are mildly concerning to me. My max HR is around 208 at this point in my fitness with a resting HR of around 42. I do have an appointment with a cardiologist soon, but am…Read More

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  • Question about ECG – Will the ECG data be captured when I click on Start Activity ? I would like to see / share my ECG data after/during exercise. I can see only option as (share link). My requirement is to capture the ECG data by default whenever I exercise and review the data later.

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  • Hi,
    How can I see breathing rate? Can the Apple Watch show this or is there any other device that will work?

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    • The value shown as ‘ Effort’ during your activity is the same as your breathing. You will notice that the unit for this value is breaths/min. We are using breathing rate as a measurement of effort because there is a lot of research to show that breathing rate is more closely correlated with perceived effort than heart rate.

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