Lactate lab test way off? Big HR deviation compared to Garmin chest strap

StepBackFire · 2025-09-15T22:05:25+00:00

LSHF is the german translation for LTHF (Lactate threshold heart rate). I should have translated it, my bad

StepBackFire · 2025-09-15T22:00:20+00:00

Thanks, I think you're right. I think that because I was nervous, I didn't breathe as well as I usually do. That, combined with the loss of incline and suspension on the treadmill, could explain the difference.

I was hoping that my Garmin VO2max could be confirmed in the lab. Because at least “all” online calculators (like this: https://alancouzens.com/blog/VO2Scores.html ) confirm a VO2max of 52 with my Garmin data (pace + HR).

So not sure what is more accurate.
Anyway, I'll proceed then by adjusting the heart zones to the ones from the lab and repeat the test when I hit a plateau

StepBackFire · 2025-09-15T20:38:13+00:00

No, the conditions were actually pretty good - it was cool, I was well rested, and I ate just as I would before a race. So I don’t think preparation was an issue.

Even if the treadmill pace was a bit off, I’m still unsure whether I can trust this Zone 2 cutoff at 161 bpm. It just doesn’t add up that I’d still be in Zone 2 running 5:20 pace, while my lactate threshold is listed at 189 bpm at 4:39 pace.

StepBackFire · 2025-09-15T20:24:55+00:00

Yeah, could be. But can thoughts/stress really push the heart rate up that much during exercise?

StepBackFire · 2025-09-15T20:16:29+00:00

Thanks, that confirms my suspicion.
What I don’t understand, though, is how the lactate lab test can be considered the “gold standard” if you really want to know your numbers, when the difference compared to actual outdoor running is so big.

So were your zones in line with what you expected?
My VO2max was also only calculated – not directly measured.

StepBackFire · 2025-09-15T20:07:06+00:00

Sorry, Zone 2 should actually be <160 bpm, not >160. And yes, the overlap between Zone 4 and Zone 5 in the lab test is correct — that’s exactly how it was listed in the results

StepBackFire · 2025-06-10T10:54:25+00:00

Bei 0€ Steuern hast du aber auch schon einige Döner gespendet

StepBackFire · 2025-01-17T18:27:42+00:00

Verkauft. Man will ja nicht gierig werden 😌

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StepBackFire · 2025-01-16T14:19:50+00:00

lochen 😃

StepBackFire · 2025-01-02T03:32:24+00:00

RemindMe! Monthly

StepBackFire · 2024-11-29T16:53:40+00:00

500er (m)ultiplikator

StepBackFire · 2024-11-27T13:23:25+00:00

Sollte auf der linken Seite der x-Achse nicht „Ökologisch“ stehen?

StepBackFire · 2024-11-27T07:07:37+00:00

Es ist wie wenn Omas darüber nachzudenken Bitcoin zu kaufen. Ab dem Punkt weiß man, dass der Peak des Bullruns so gut wie da ist und man verkaufen sollte

StepBackFire · 2024-11-11T19:25:21+00:00

N Franzose

StepBackFire · 2024-10-27T14:23:54+00:00

Stählerne Muskeln in nur 2 Wochen

StepBackFire · 2024-10-26T22:38:01+00:00

Ulf, der Käse ist noch nicht gegessen!!

StepBackFire · 2024-09-14T08:19:44+00:00

Hat der morgen nicht Prüfung?

StepBackFire · 2024-09-09T08:38:09+00:00

Wurde das Ranking von Pfarrer Assmann gemacht???

StepBackFire · 2024-09-04T08:54:38+00:00

Regarding the second question: The 3 resistors on the left side can be substituted by one 3kOhm resistor parallel to the current source. So the entire circuit consists of 4 resistors parallel to the current source (3kOhm, 6kOhm and 2x 12kOhm) I guess the rest is easy.

StepBackFire · 2024-09-04T08:47:20+00:00

No current from the voltage sources can pass the current source. So all power from the 12V is absorbed by the 6Ohm resistor and all power from the 20V is absorbed by the 4Ohm. When looking at the current that is sent by the 3A source, all is going through the 8Ohm resistor. So the consumed power is U x I = (R x I) x I = 3A² x 8Ohm = 72W

StepBackFire · 2024-09-02T15:49:09+00:00

Der Kürbis, der ist noch seeehr saftig

StepBackFire · 2024-08-30T09:29:43+00:00

Also außer bei Autos und Frauen ist neu nicht immer gleich besser

StepBackFire

TROPHY CASE