Delays in speed and pace makes it impossible to follow suggested sprint workout with Fenix 6X Pro Solar version 12.10 RC

I have posted some other threads about the delays in speed and pace on my Fenix 6X Pro Solar (software version is now 12.10 RC).

Today I tried to follow the suggested workout which was a Sprint workout called "3x3x0:[email protected]/h 55:00". Se picture:

The estimated benefit was like this:

I followed the instructions on the watch and ended up with this training effect result which I thought was strange... I noticed that the speedometer had really long delays while running.

I logged in to Garmin Connect on the web to look at the training and especially the pace diagram which shows targeted pace vs the watch pace. And there it is, the delays are there and mess up the interval training. The gray is targeted speed and the blue line is the pace that the watch shows. Several seconds delays. See this picture:

And if we look at the statistics for each interval we can see that the pace is totally wrong...

Garmin, please fix this...

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0 iLikePotatoes over 4 years ago

Pace does affect training load, but not directly. High pace -> High HR -> High load.

There is something wrong with your HR input.

1. Watch loosing connection and reverting to OHR - giving wrong values

2. Something wrong with the chest strap - reporting low values

Looking at the max HR values from this picture:

Max HR for entire workout is 150 which you reached in the first interval, and second highest is 144 which you managed to reach twice...

Not figures I would expect to see in the Sprint...

Averages look even worse, looks more like light jog / light run (far from any sprint).

Can you post HR graph overlayed with pace, and respiration rate graph (if HR strap disconnects resp rate goes flat)?

0 AndersB over 4 years ago in reply to iLikePotatoes

It was a 55 min workout with loads of resting included between the 15 seconds intervals. So i think that the HR is correct. I have low heart rate. Resting HR ~42 and max HR ~182.

Pace vs heart rate

Pace vs respiration rate

0 mrscientist over 4 years ago in reply to muppetman

Stryd is not $400. It is $219 (https://store.stryd.com/) and is worth every penny.

0 AndersB over 4 years ago in reply to mrscientist

I will be happy if Garmin solves this issue with speed and pace. Its a bug (or design flaw) in the Run activity. The Bike activity works rather well.

I cant understand how most of you can accept this kind of delays... buy a Stryd to fix speed/pace bugs, buy a HR strap/belt to solve wrist HR bugs, buy a odometer to fix bugs with distance, buy a oxiometer to fix pulse ox bugs etc etc. No! Fix the bugs now!

0 AndersB over 4 years ago in reply to iLikePotatoes

iLikePotatoes, did you see my reply to your post? Both HR and respiration looks correct to me. See the screenshots above.

0 Dr Phil over 4 years ago in reply to AndersB

Looking at the heart rate I’d suggest the values you have relate directly to the heart rate. With a max HR of 182 I’d expect to see your heart rate get closer to 170 to have any anaerobic affect. As it is it looks like you’ve barely got over 150 during your intervals.

Yes there are issues with instant moving pace but I don’t believe they are related to the TE resulting from this workout.

0 Dr Phil over 4 years ago in reply to AndersB

AndersB said:
buy a HR strap/belt to solve wrist HR bugs

You buy a heart rate strap to solve the technical limitations in optical heart rate technology.

0 AndersB over 4 years ago in reply to Dr Phil

There are a 3 minutes stand still rest before interval 2 & 3 in each set. My HR BPM goes from ~100 to ~140 in roughly 15 seconds. Between the sets there is a slow jog so the heart rate is higher before interval 1 in each set.

When im playing with speed intervals during ordinary long/slow jogs the anaerobic points can increase with 0.7-0.8 with each sprint.

I think low heart rate and high speed gives more anaerobic points than high heart rate and high speed.

But in this sprint workout the points are not counted correctly because of that the speed is delayed and half of it is placed in rest mode and 7-9 seconds of rest is placed in the interval.

0 AndersB over 4 years ago in reply to Dr Phil

This is a pace/HR screenshot over a slow 10,63 km jog with 3 short speed intervals included. It gave 1.7 in anaerobic points. As you can see the sprints was almost identical as in the sprint workout. Without the 3 sprints there had been 0.0 in anaerobic points.

0 iLikePotatoes over 4 years ago in reply to AndersB

AndersB said:
It was a 55 min workout with loads of resting included between the 15 seconds intervals. So i think that the HR is correct. I have low heart rate. Resting HR ~42 and max HR ~182.

Pace / HR / Respiration are in line. Looks like there is no issue with the data, just bad workout... For Anaerobic benefit watch expects to see rapid HR rise to (or close to) zone 5, and you missed that completely.

First sprint managed to get HR to 155 and contributed most of your 0.8 anaerobic load. Rest of the sprints (looking at the HR graph) - do not really look like sprints.

Most of your sprint HR maxes fall in line with steady pace HR values and that is main reason watch gave you 0.8 anaerobic load.

AndersB said:
I think low heart rate and high speed gives more anaerobic points than high heart rate and high speed.

You get points according to your HR during exercise. I doubt that pace figure makes any difference. You can test this by sitting on the sofa and shaking your arm (like if you are running). Watch will report mad pace but you will get no points because your HR is low (please use strap to avoid mad HR from OHR cadence lock).

AndersB said:
This is a pace/HR screenshot over a slow 10,63 km jog with 3 short speed intervals included. It gave 1.7 in anaerobic points. As you can see the sprints was almost identical as in the sprint workout. Without the 3 sprints there had been 0.0 in anaerobic points.

You got more points here because you pushed your HR to ~157 3 times.