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  • Would this file be usable, provided that I amend it with either an external log file from Garmin watch

    Yes, that'd be fine - but you want to merge the two so it's just one big CSV file with lines for the BTHRM column when the heart rate data is available. Syncing time could be an issue but I guess as long as you're within 10 seconds or so it's unlikely to matter

    However it's worth noting that the Garmin watch will be having similar issues grabbing your heart rate so it may not be that accurate - really spending £20 on an bluetooth ECG heart rate monitor would be the best way to get accurate data.


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