Not understanding this load difference

Hi there!

I love Intervals! I’ve been using it for a few months, but I still don’t get how load is calculated. I did read a lot about it. But… take a look at this:

- Yesterday (Sat 28 Jan): very hard race on the snow:

  • 162 bpm avg.
  • 1 hour 42 minutes
  • Load: 75

- Friday 13 Jan:

  • 147 bpm avg.
  • 1 hour 12 minutes
  • Load: 91

How come an easy run load is way bigger than the one for the race?

Thanks!

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How is your priority setup in Settings?

You have power showing on your workouts.
Based on your pace and power, the load seems correct.
6:18/Km, 251W, 91 load
8:39/Km, 191W, 75 load

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Easy run? You judged it with an RPE of 9. My guess is that you were extremely fatigued that day and were not able to get HR up, while still pushing high Watts. If load was calculated using Power, these numbers make sense, as @Gerald says. If you would check the load based on HR, those numbers will be totally different. Open the activity page of both runs and click on Load. It will show you load for the different sources, Power, HR and pace based.

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image
@Gerald So when HR, Pace & Power are selected as the grouping for TL Priority how does Intervals work out TL? What I mean is does Intervals take HR first to calculate TL and in the absence of HR, it then takes Pace and in the absence of that it takes Power OR does Intervals use all 3 metrics to calculate TL?

My bad! I did not remember that was a workout run. Any way, I uploaded the same activity, with no power data to compare over the same one with power:

Intervals_icu

That’s more than a +25% increase on load.

I thought time/HR prevailed over power, since power is not standard for running. I’m using Stryd, but as far as I know, Coros, Garmin, etc. use a different power estimation method. So watts are not equivalent. am I wrong? Just asking out of curiosity.

Also, just as extra info, my last activity was affected by external factors such as:

  • Extra cold: 10.4 F/ -12 C
  • Altitude: almost 3.000 meters

That affected HR, but now power (I guess). So I guess power should prevail over HR, but my RPE was way higher on this activity. My recovery is being harsh on my body too…

Thanks for the info!

Thanks! I did not know about that OMG

Intervals_icu

Know I don’t know what to do… I guess I should stick to HR priority, since I might stop using power in the future. HR is always going to be there… Hopefully!

You’re correct. If you’re changing it every so often, the data you’re getting will be mixed and it won’t reflect / consistent. So better to just rely on one.

If you have a stryd, just use that and set the power preference (over Garmin) within intervals.

Yes… based on the “Training Load Priority”
it’s like this

if power exists & > 0, then use power,
else if Hr exists & > 0, then use HR
else if… etc…

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I have a difference in my training load (Road cycling) when using power vs heart rate, eg. I don’t have a PM on my MTB, but Intervals can calculate the estimated load (hrTSS) based on the trends it gets from power and HR.

TrainingPeaks too also under estimates my load, but certainly not 25%. I am not qualified to answer your problem relating to running with power, as I don’t have any data to look at, and I can’t comment on how accurate the estimation of power is from Garmin/Stryd. However, there have been a few posts since my previous one that gives some tips on consistency. Pick a method of measuring, including the priority, and stay with it.

This is your answer, providing you have your priority setup in that order.

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Thank you. All clear now!

I need to figure out if sticking to power from Stryd would be good enough for me,. However, that’s for a new thread.

1 Like