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Lactate Threshold

DC over 2 years ago

Hi,

Apologies, I am going around in circles. I have ready LTHR is the best way to determine HR zones. My question is, does the 965 calculate a LTHR when out on runs that are more than 20 minutes? I don't want to build in tests often (unless that is the right thing to do) if the watch calculates it anyway. My issue is it appears my LHTR has't changed in months locked in at 165.

I am not sure if I have a historic value that won't change as I use the 965 or whether I just need to be patient. I have a TrainingPeaks account (no understanding of the data) and it gives me a new HR threshold (not sure if that is the same) and it is generally 161-167 etc.

All advice appreciated.

DC

0 PatrickNSF over 2 years ago

Mine has updated twice running with the 965 in the past nine days. I don’t remember how long the first run was, but the second time it updated was after an 8 mile, 70 minute run where I was trying to test a moderate marathon pace (so I was pushing the pace a bit but it wasn’t a speed workout).

0 darrencroton over 2 years ago in reply to PatrickNSF

Were you using a chest strap? I think you need an external HRM to get LT values.

0 seilogramp over 2 years ago in reply to darrencroton

darrencroton said:
I think you need an external HRM to get LT values.

Yes

How Is Lactate Threshold Measured by My Garmin Device? | Forerunner® 965 | Garmin Customer Support

You can detect a lactate threshold either through a guided test, or through auto detection. Both will require the following information.

A chest heart rate monitor strap must be worn.
An established VO2 max estimate must be set.
An established GPS lock.

0 DC over 2 years ago in reply to seilogramp

ah, so that is where I am going wrong. I have a chest strap and rarely use it. So either I would be better to use max HR for my zones or to run regularly with the chest strap?

0 PatrickNSF over 2 years ago in reply to DC

Depending on your activity level, I’d consider doing the guided test every few months. In my experience, you’re better off with your zones set by LTHR than by max HR. (They come out closer to what I was given when I was lab tested a few years back.)

0 DC over 2 years ago in reply to PatrickNSF

I run 3-4 times per week but doing a guided test every few months would be do-able. I just need to find a flat-ish two miles. :(

0 JohnTheRunner over 1 year ago

My issue is my numbers are getting worse each run. Nothing changed in my training to cause this. See image. Anyone else notice this?

the first drop is when I started using the 965 previously was using 945

0 Etupes25 over 1 year ago in reply to JohnTheRunner

What kind of runs are the last runs (duration and intensity of intervals)?