Interval workout total meters higher than actual.

[ssmsti]

https://imgur.com/a/w8fxFLt

After a 50 minute 5 interval workout with no rest in between. The total of the 5 intervals do not add up to the total shown on the pm5 and the concept app. The actual total is 10,348 but the app and pm5 are showing 12,321.

What is happening?

This seems to have occurred after updating to the latest firmware version.

[jamesg]

Logbook shows two distances, with and without the meters rowed during rest times.

[iain]

Definitely the case on the PM3 and this is sometimes more than could be rounding. If you aren't pulling the handle as you start the interval, the monitor doesn't start. At least some of the time when it does start then you are deducted the time that has elapsed. I suspect that the metres in the interval includes the distance before this first stroke, but the total metres doesn't, but that is mere supposition. I try and time the first stroke to avoid this.

Does anyone know definitively the reason?

[Sakly]

...

...

Read this again and look at the rest meters of the picture.

After a 50 minute 5 interval workout with no rest in between.

No clue what happened there. I would contact C2.

[p_b82]

might be worth pulling the per stroke data down and see what's happened there.

but the screenshot has got your wattage average as nearly 200 - so that's why it thinks you've gone further.

As for the why, can't answer that - hopefully C2 can!

[jamesg]

After a 50 minute 5 interval workout with no rest in between.

Evidently "no rest" to you means you did not stop completely. But that's not the C2 definition of rest. See the WODs that say for example: One minute at light pressure between each piece.

https://www.concept2.com/indoor-rowers/training/wod

There were rests in between: the numbers are clear: 12 321 - 10 348 = 1973m rowed during rests.

You can see the contradiction in the table in the image: your paces in the five intervals are much slower than the supposed average; which is impossible.

Se also the memory on your PM.

[iain]

After a 50 minute 5 interval workout with no rest in between.

Evidently "no rest" to you means you did not stop completely. But that's not the C2 definition of rest. See the WODs that say for example: One minute at light pressure between each piece.

https://www.concept2.com/indoor-rowers/training/wod

There were rests in between: the numbers are clear: 12 321 - 10 348 = 1973m rowed during rests.

You can see the contradiction in the table in the image: your paces in the five intervals are much slower than the supposed average; which is impossible.

Se also the memory on your PM.

Not necessarily, as I said, the recording of distance is not accurate as OP stated when 0 rest is selected on interval workouts. In addition, there is a qwerk of how the time is recorded when you stop mid equal interval. If I stop recording before the end of the 6th interval, my PM3 only records the total time as 5 intervals. Apologies I couldn't access the image on my work PC so didn't realise the discrepancy was so large in my reply above.

[jamesg]

Yes, I tried a 4 x 30s set with rest zero; the total m shown differs a lot from the total of the splits, and the four paces are all slower than the average shown.

So then I did 3x20s with 5s rest. No error.

Could be there's a division by rest time somewhere in the PM's sums; dividing by zero is a difficult task that can't give any reasonable result. Maybe PM should oblige a minimum rest time, not least to give itself the time needed to do any sums.

Must say I can't see why one would set rest zero, and call it intervals. Setting a single 50' pull, PM suggests 10 minute splits anyway; and we can adjust that down to 1 minute if we wish.