Lactic threshold pace and HR values from the 735xt?

What you have your maxHR set to and how close you come to that for an extended time will play a factor.

When I finally triggered an LTHR on my F3 was when I was doing 3 mile intervals at HM pace. I'd done similar workouts without getting a reading before, but this day was windy and I ran the same pace while getting my HR higher. So maybe you got your HR elevated enough, relative to your MaxHR, for a long enough time.

What you have your maxHR set to and how close you come to that for an extended time will play a factor.

When I finally triggered an LTHR on my F3 was when I was doing 3 mile intervals at HM pace. I'd done similar workouts without getting a reading before, but this day was windy and I ran the same pace while getting my HR higher. So maybe you got your HR elevated enough, relative to your MaxHR, for a long enough time.

Agree with what R_Tellis wrote but at the same time I have never really figured out exactly when I will get an LT-reading post workout. I had workouts that based on perceived effort (including time and distance) I thought it would definitely give me an LT at the end (but it didn't) and vice-versa.

Having the formulas being completely opaque to the end-user is understandable from an IP / Biz competitive advantage standpoint but at the same time, it reduces the value for athletes who need to know what's going on, in order to trust and interpret the metrics.

This is off-topic but FYI I am a big fan (and have no relationship with) Runalyze.com a free website the provides all the formulas along with the analytics so that you know how each metric is calculated.

When I go to the lactate threshold in the statistics menu on my 735xt it sais I need a chest strap hrm to get this statistic.(that I don't have)
So if you recenly got one I guess that's what triggered it.

This is what the manual sais:
manual-forerunner735/

When I go to the lactate threshold in the statistics menu on my 735xt it sais I need a chest strap hrm to get this statistic.(that I don't have)
So if you recenly got one I guess that's what triggered it.

Nope, as i said. However maybe it views the Socsche as a chest strap?

This is off-topic but FYI I am a big fan (and have no relationship with) Runalyze.com a free website the provides all the formulas along with the analytics so that you know how each metric is calculated.

Thanks for that. I'm a big fan of data and metrics myself. I'll have a look.

EDIT: Doesn't look like they do auto-import of GC data :( Or even Tapiriik. I have so many services i push to nowadays it's becoming a chore without something that automates the process. Other than this it looks really good.

I get automatic LT values largely on runs where the pulse starts fairly low but the pace and HR ramp up throughout the run. That's basically what the specific test looks at.

I get automatic LT values largely on runs where the pulse starts fairly low but the pace and HR ramp up throughout the run. That's basically what the specific test looks at.

I'm assuming that's when you use your strap Tim. Do you know if the watch can distinguish between a strap and any external HRM?

However maybe it views the Socsche as a chest strap?

I don't think the ANT+ device profile for heart rate monitors provide for the communication of type (including, but not limited to, ECG versus PPG, or chest strap versus optical), and I don't see heart rate variability – being the basis of a lot of the metrics reliant on technology licensed from Firstbeat – in either the capabilities that can be explicitly declared upon connection, or data fields that are sent periodically in ANT+ messaging.

Perhaps simply using an external HRM connected by ANT+, irrespective of type, satisfies the necessary (but not in itself sufficient) criterion. We already know that Garmin's owner's manuals tend not to be technically precise; for example, they will only describe broadcasting heart rate data from device models with built-in Elevate optical HR sensors to other Garmin devices, instead of “over ANT+ to any device that understands the Heart Rate Monitor profile”.

Perhaps simply using an external HRM connected by ANT+, irrespective of type, satisfies the necessary (but not in itself sufficient) criterion.

Yeah i was thinking something similar ASmugDill. Thanks for your response.

I never got L/T. I thought it might be a bug in the 735 so I did the guided test. Guess what? I got a L/T! It's just my normal running doesn't fit the profile needed to generate a L/T. Try the guided test, stick to the pace guides and you should get a L/T

CW