Why does my heart rate data look different?

How long are the runs? The flatter profile could be twice as long so the line is just stretched out

Just a guess wrote:

How long are the runs? The flatter profile could be twice as long so the line is just stretched out

This is a possibility. Also, is one of the runs hillier than the other?

ThatAverageRunner wrote:

Just a guess wrote:

How long are the runs? The flatter profile could be twice as long so the line is just stretched out

This is a possibility. Also, is one of the runs hillier than the other?

I'm seeing the issue in across all distances, and it happens on both hilly and flat terrain.

Bump

You should have also supplied pace and elevation charts alongside the HR charts - the second trace can easily be produced by hilly terrain, whereas the first could be a constant-pace run on flat terrain.

What recording frequency do you have your Garmin set to for each run? The stepped heart rate graph looks like it could be generated when you set the Garmin to record at greater than 10 second intervals.

Is smart recording off?

wojak wrote:

because you have the feels

I'm confused why people think flat/hilly terrain is relevant.

Hurr de durrr wrote:

Is smart recording off?

Yes it is. I have it set to every second.

Bra-ket wrote:

wojak wrote:

because you have the feels

Nice.

A Garmin hrm1g chest strap was giving greatly erratic and overall way to high readings to an ant receiver on an exercise machine at very low efforts and paces. I returned the chest strap for a refund, and haven't yet found a suitable alternative.

There are many comments on this web site about erratic readings from Garmin chest straps.

https://www.dcrainmaker.com/2010/08/solution-to-heart-rate-dropoutsspikes.html

Hardloper wrote:

I'm confused why people think flat/hilly terrain is relevant.

Why wouldn't it be......?

ThatAverageRunner wrote:

Hardloper wrote:

I'm confused why people think flat/hilly terrain is relevant.

Why wouldn't it be......?

The issue he's asking about is that one graph is a lot more smooth granular and the other looks like it was sampled at a much lower rate and connected with flat lines

Hardloper wrote:

ThatAverageRunner wrote:

Why wouldn't it be......?

The issue he's asking about is that one graph is a lot more smooth granular and the other looks like it was sampled at a much lower rate and connected with flat lines

Exactly.

- This happens for about half of my runs

- I have the Stryd app added, but this has occurred before I had any third party app installed

- I'm on the newest firmware, but this has happened for all firmwares I've used, included 9.10

- I actually replaced my heart rate strap with a brand new one, and this issue still occurs (as well as with the OHR monitor)

- There is no damage to the wrist heart rate sensor, and I keep it totally clean

- I've tried a hard reset multiple times

I have similar HR readings. My easy recovery (

Hardloper wrote:

I'm confused why people think flat/hilly terrain is relevant.

ha ha ha

This is LRC. Internet home to geniuses.

My guess is its differences in the way you are wearing the heart rate monitor and or environmental factors (tightness, location, amount of perspiration and/or humidity). Alternatively, it could be differences in data sampling and or the efficiency in the transmission of the data. It looks like the second trace might be less accurate - meaning fewer data points so you see a general outline of the trace but in less detail

20 million year old carbon wrote:

My guess is its differences in the way you are wearing the heart rate monitor and or environmental factors (tightness, location, amount of perspiration and/or humidity). Alternatively, it could be differences in data sampling and or the efficiency in the transmission of the data. It looks like the second trace might be less accurate - meaning fewer data points so you see a general outline of the trace but in less detail

I wear the watch (and the HR strap when I wear one) exactly the same way. Also, this has occurred in both cold and extremely humid conditions. There is just no pattern I can find.

I agree that it might have something to do with the sampling or data transmission, but other than returning the watch, I don't know how to fix that.