Lactate Threshold Test

Hey, I have performed the guided lactate threshold test for the first time today. To my surprise it ended quite early @168bpm. As this is my first running LTH test I am willing to let it be. I had it calculated in the past via different platform on the indoor trainer @171bpm, but I cannot say which method is more accurate. I want to make sure that everything I have done was OK.

I have used Polar's H10 HR sensor via ANT. And here is the first question. Does ANT impair the accuracy of the data? The DFA Alpha 1 article states that only BT is accurate enough for HRV data gathering. (Garmin does not say anything about that, even encourages to use ANT straps...).

The second question is smart data recording has an impact on it? - Should I use every second or it does not make any difference.

Thank you for your help.

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0 Ɛpsilon over 3 years ago

That 3bpm difference is probably small enough to mark as "statistical error" and I'd suggest if concerned, perform it quasi-regularly to see how it develops.

I'm not sire about ANT+, but I would say quite confidently that smart recording only effects writing the data to the FIT file, not the actual measurement.

0 Ɛpsilon over 3 years ago in reply to Ɛpsilon

Looking at the article, it's also a little unclear whether the problem with ANT+ bs BLE is for the Polar H10 only, or is a general problem with HR straps in general. Also, the article does mention that the error is in calculating LT1 Aerobic Threshold, not LT2 Anaerobic threshold or the LTHR Garmin measures. So it's a little unclear what the effect on LTHR would be. I would suspect it wouldn't really be huge/

Yes its talking about the Z2/Z3 boundary, where the LTHR for GArmin is the Z4/Z5 boundary

0 micro over 3 years ago in reply to Ɛpsilon

Well, the H10 is considered the gold standard in the HR strap department, that is why there is no other strap mentioned there as no other strap in their opinion produces satisfying results.

0 Ɛpsilon over 3 years ago in reply to micro

Yeah, I'd look at re-running it regularly - but at the Z4/Z5 boundary that 3bpm difference begins to be less significant (it would work out at about a 1.3% error at ~168bpm) - so would become less significantly significant. At the Z2/Z3 boundary that error rises to about 2-2.5% so again small, but more significant

0 micro over 3 years ago in reply to Ɛpsilon

I did the test for the Z2/Z3 zones primarily as I do not plan to race nor train in higher zones right now.

0 Ɛpsilon over 3 years ago in reply to micro

Garmin's Guided LTHR is for Z4/Z5. So it will rebuild the zones for all of them on those values and percolate it down. I think for your case, the error will be quite small.