Power @ specific heart rate

[Sven Bauwens]

Hello,

Is it possible to get average power over a specific heart rate? This over a larger period (for instance this year), to compare. I know you can see power@150 per activity. 

I've seen an earlier post on this topic, but couldn't make much of it. Thank you. 

[Mark Liversedge]

On Tuesday, 5 May 2020 09:10:23 UTC+1, Sven Bauwens wrote:

Is it possible to get average power over a specific heart rate? This over a larger period (for instance this year), to compare. I know you can see power@150 per activity. 

I've seen an earlier post on this topic, but couldn't make much of it. Thank you. 

This could be done via a User Metric, using a range to try and minimise the influence of HR dynamics e.g.;

Mark

[Mark Liversedge]

I'm prepping a video on user metrics and user charts, will use this as an example

[Sven Bauwens]

Worked, thank you! Now I want this for 171 bpm, but it keeps changing to HEARTRATE < 150 && HEARTRATE > 140. I even can't remove the metric, it keeps showing up again after restarting. I must be overlooking something.

[Mark Liversedge]

On Sunday, 10 May 2020 22:45:35 UTC+1, Sven Bauwens wrote:

Worked, thank you! Now I want this for 171 bpm, but it keeps changing to HEARTRATE < 150 && HEARTRATE > 140. I even can't remove the metric, it keeps showing up again after restarting. I must be overlooking something.

You will need to create a second user metric and edit it.

You will need to press Save when you leave preferences/settings to ensure changes take effect.

Mark

[Adam Jędrysik]

Mark could You help me how to add that average power at hr to trends->tracker and as a chart?

[Remco Boerwinkel]

Hi Adam,

In the past I created a python chart for this. This shows for an range of heart rate the average power in an date range, so not an single hr value. I did not use any user metrics for it.

So if you got python configured and look in the clouddb chart under uncurated I think it is listed as "power at hr".

One note this chart is pretty slow, downside of not using metrics.

Hope this helps.

Kind regards,

Remco

Op ma 11 mei 2020 19:22 schreef Adam Jędrysik <adam.j...@gmail.com>:

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[Jozef]

Hello, I have some questions.
The first is why the range to find the power at 145 BPM is between 150 and 140. Wouldn't a range between 146 and 144 BMP be better? The second question I have a phyton graph that identifies me the power at 150 and 170 BPM but the data that gives me do not coincide with those of the metric related to those beats. Why?

[Thomas Petzold]

Hello,

does anybody know how to use the function to compare different seasons with the Python-Chart "Average pwr by hr (Py slow)"? In the description there is a hint the tis function is implemented. But I didn`t get it to work. I can`t choose two different data-ranges. I also tried a season with two phases. But this also doesn`t work.

Can anybody help with this cloud-chart?

Regards

Thomas

Am Dienstag, 12. Mai 2020 06:37:51 UTC+2 schrieb RB:

Hi Adam,

In the past I created a python chart for this. This shows for an range of heart rate the average power in an date range, so not an single hr value. I did not use any user metrics for it.

So if you got python configured and look in the clouddb chart under uncurated I think it is listed as "power at hr".

One note this chart is pretty slow, downside of not using metrics.

Hope this helps.

Kind regards,

Remco

Op ma 11 mei 2020 19:22 schreef Adam Jędrysik <adam.j...@gmail.com>:

Mark could You help me how to add that average power at hr to trends->tracker and as a chart?

On Monday, May 11, 2020 at 8:57:29 AM UTC+2, Mark Liversedge wrote:

On Sunday, 10 May 2020 22:45:35 UTC+1, Sven Bauwens wrote:

Worked, thank you! Now I want this for 171 bpm, but it keeps changing to HEARTRATE < 150 && HEARTRATE > 140. I even can't remove the metric, it keeps showing up again after restarting. I must be overlooking something.

You will need to create a second user metric and edit it.

You will need to press Save when you leave preferences/settings to ensure changes take effect.

Mark

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[Remco Boerwinkel]

Hi Thomas,

The Standard GC compare should work. 

Here a link that describes how.

https://github.com/GoldenCheetah/GoldenCheetah/wiki/UG_Compare-Pane_General

Hope this helps kind regards,

Remco

Op zo 17 mei 2020 17:15 schreef 'Thomas Petzold' via golden-cheetah-users <golden-che...@googlegroups.com>:

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[Thomas Petzold]

Hi Remco,

that was the hint :-) thanks a lot!

Regards,

Thomas

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[Sven Bauwens]

Finally had some time to figure this out. Actually I get nothing ( I get following message: Data unknown) No wattage displayed at all. I can't even remove the metric, it keeps showing up again after removal and restart. 

Side-effect maybe, but my tables don't update anymore. For instance, my weekly update keeps show the week of April 20 as latest week. 

Op maandag 11 mei 2020 08:57:29 UTC+2 schreef Mark Liversedge:

[Jozef]

Hi, sorry if I ask my questions again. I do it because I had no answer.
In the metric to find the power at 145 BPM, a range between 150 and 140 is proposed.

Wouldn't a range between 146 and 144 BMP be better?

The second question, I have a phyton graph that identifies the power at 150 and 170 BPM, but if I report the proposed metric appropriately modified to find the power at 150 bpm with the python graph I do not get the same results. Different matter of average calculation of raw data?

[Remco Boerwinkel]

The different IRC is that the python (if you are using graph power by hr that I created) finds all power samples at an certain  heartrate and takes the average of it. Al those averages are plotted.

The user metrics finds power between en certain heartrate mine assumption that should explain the difference.

You could try change the user metric (for testing) heartrate == 150. See if it the same then.

Kind regards,

Remco

Op do 21 mei 2020 11:42 schreef 'Jozef' via golden-cheetah-users <golden-che...@googlegroups.com>:

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[Salvatore Iovene]

Hi all,

I'm trying to get this working but I can't manage. I have GC build id 3991 from Jan 18 2020, so, seeing as this thread is from 2020, I don't think anything changed in my version of GC.

I added a user metric with this code:

{

# only calculate for rides containing power

relevant { Data contains "P" && Data contains "H" }

# initialise aggregating variables

init { joules <- 0; time <- 0; }

# joules = power x time, for each sample

sample {

if (HEARTRATE > 134 && HEARTRATE < 150) {

    joules <- joulels + (POWER * RECINTSECS );

    time <- time + RECINTSECS;

  }

}

# calculate metric value at end

value { joules / time; }

count { time; }

}

Then I added this metric to a chart. Please see screenshots.

However, the resulting chart is empty, and in my user metric clicking Test evaluates to 0 results.

What am I doing wrong?

Thanks!

[Mark Liversedge]

You have a typo here:

joules <- joulels + (POWER * RECINTSECS );

Mark

[Salvatore Iovene]

Thanks Mark! You'd think after being 20 years a programmer I'd have noticed that :-)

[Mark Liversedge]

The errors should have been highlighted by the syntax highlighter which is a bit odd it didn't.

If it makes you feel better I once realised I needed new glasses when I couldn't understand why some code refused to compile.

I had put a capital O instead of 0 (zero) in a statement and couldn't see it.

Mark