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  • Hello, I was swimming today. According to history it shows max heart strain as.25 in red color however when I hit on that activity and go inside the average heart strain is in blue color and is 0.01 I don’t know if it is considered ok or not . I see 2 different values and I don’t know which one I should go by. I attached both screenshots

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    • Hi Frederick – I also use the frontier during water sports so can give you my advice for what its worth (please note I have no affiliation with Fourth – I am simply another user) The 0.25 figure in red is showing you the MAX strain that was recorded during your workout session – the 0.01 blue figure is showing you the AVERAGE strain recorded. It…Read More

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