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Everything is wrong with my 935

EDIT: Solved. See post #9

First it was the lactate threshold problem :
https://forums.garmin.com/forum/into...low-heart-rate
This started with firmware 7.10, that is before updating to 7.60

Then the problems multiplied. Last Friday I did interval training. When I finished I was very surprised to see my vo2 max skyrocketing from 47 to 49 (!!!). Two days later, after my long run, vo2 max went up to 50 (!!!), and finally two days ago to 51 (!!!) after my easy run plus strides. At first I was very happy to see my vo2 max going up, but I was clueless, and after the second update of vo2 max I began to worry. I then realized that no matter how many hours I was running, no matter how hard, the training load wasn't going up as it should, but down as if I was not working out at all ! Then I figured that this decrease in training load had something to do with the vo2 max increase.

Today I had 10k easy, but I decided to go a little bit harder than this, at about 80 percent of maxHR. Even though I did so, at the end of the workout the was no performance condition at all, and the aerobic training effect was just 1.0 (!!!).

As I'm reading a lot of people have many problems, similar to mine or not, I don't know what to guess, is it a firmware problem or not ?

Could a master reset solve the problem ?

0 nsantoiemma over 7 years ago

~The strap is old
~The batteries are near dead
~The Electrodes have not been wet (which every Chest Strap owners guide tells you to do this before a workout) Example: http://www.manuals365.com/swf/garmin...12.html?page=2

For the record, it was a brand new HRM Run, the software on the HRM was updated, and I wet the electrodes prior to my run. It wasn't my first rodeo.

I have no vested interest in convincing you, and i've spent enough time on this thread. All I can do is point to the things I know and what i've learned and hope it helps you, that's all.

I appreciate your response. It was clearly thought out. That being said, I don't think you need to convince me of anything. I've been training with a Garmin for years. I've had or currently have, a 210, 235, 610, 620, fenix2, fenix3, 935, Edge 810, Edge 1030, and guess what, I am pretty certain the data collected by all those devices has never been 100% accurate.

The GPS, is probably within x feet, the total distance is within +/- x mi/k, calories...well we all know how impossible it is to get consistent caloric data, same for elevation, and of course there is HR, among plenty of others (power, vertical oscillation, stride length, swolf, etc. ).

These devices are meant to give us a damn close approximation of all of these and Garmin does a great job of getting us there (minus the open water swim function). It is what it is. So yeah, going back and forth about the perfection of the HRM strap vs the optical sensor is a waste of time. Overall, the HRM strap is better. Most can get away with optical as it tends to be pretty close and is my opinion, much more comfortable. But let's stop expecting these things to be 100% because guess what, they're not.

0 Former Member over 7 years ago

I know that wrist hr isn't reliable, I just thought to give it a try and see the readings after the workout. At least, at first, when I bought the watch and was not wearing a chest strap, I never had 1.0 reading in aerobic training effect no matter how easy the workout was. Today I have interval training so it's a given that there will be a high aerobic and some anaerobic training effect.

WHR is totally reliable, it only depends on your skin and how the user tie his watch, nothing to blame the watch for. maybe on 30/30 the latency could make a difference but things are still ok for most user and 90% of the time.
And when i read someone make a difference for 2-3bpm it's just funny, if oyucan really run at a steady bpm to the beat close then it's not human.