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Heart Rate Zones Based on LTHR - After new LTHR or NEW Max HR detection

Vaya1989
4 months ago

Hey there Slight smile

Have a question regarding Heart rate zones and Automatic detections. 

First off my heart rate Zones based on LTHR was last zone 100%+ 

so if the watch detects a new measurement like Max hr or LTHR those zones switch to 99-114% etc ...

is it best to tap on "Reset" zones after a new measurement is detected or just let the watch do its thing and leave it how it is automatically configured ? 

Hope someone understands what i mean :D 

bests 

  • 0 4 months ago

    Hey. HRmax heart rate zones are not the same as Lactate Threshold. Note that the threshold where we enter anaerobic is much lower than maximal heart rate, so values ​​above 100% are normal. Setting the highest zone as 100% will mean that the anaerobic zone is actually your threshold, and it does not necessarily use glycogen. It's simpler. There is a concept of LTH1 and LTH2. The first is aerobic (between aerobic and threshold), the second is anaerobic (above threshold and before VO2max). Lactate threshold is not anaerobic, but as a rule (excluding elite 10K runners and almost all good 5K and shorter runners), the transition from running at a conversational pace to a race pace. But it still does not have to mean running like a corpse. Above zone 5 is running like a corpse.

  • 0 4 months ago

    I reported the same issue in Fenix 7 forum about 2 years ago.

    You'd think that detecting a new Max HR should not affect LTHR% based zones - those are configured relative to LTHR and should be changed only when a new LTHR is detected. But Garmin seems to think otherwise. 

    And to address the original question, with LTHR zones the bottom of zone 5 (top of zone 4) should be at 100% of LTHR, so the top of zone 5 should be somewhere above 100% of LTHR - anywhere between 108% and 115%. The advantage of LTHR% zones is that knowing your Max HR should not be needed.