PM5 - is it in my head or?

Maintenance, accessories, operation. Anything to do with making your erg work.
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Den_Thorn
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PM5 - is it in my head or?

Post by Den_Thorn » February 21st, 2017, 8:53 am

Hi folks,

Lately noticed interesting thing with PM5.
If you are rowing trying to keep certain s/m, it looks like (according to display) that keep it 26 and 28 is much more easy than 22.
If I try to keep it 22s/m, it almost never happens - numbers jump almost from 21 to 23 almost every third stroke. At the same time i can keep 28 without being that changed on the display for 1 min and more.

Just wondering if it is all in my head, or there is sort of stroke rate calculation bug in PM5?

PS: I do not remember if i have experienced same with PM3 or PM4 which I used to use in gyms before.

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bisqeet
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Re: PM5 - is it in my head or?

Post by bisqeet » February 21st, 2017, 9:16 am

probably head, although it might do some weitd rounding off...
I don't have any/much problems with the spm on the screen - the rowlogs might differ from what i thought i should have tho...
Dean
2020 Season: 196cm / 96kg : M51
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~seven days without rowing makes one weak~

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Anth_F
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Re: PM5 - is it in my head or?

Post by Anth_F » February 21st, 2017, 10:32 am

Can't say i have noticed this with my PM5.

Is this not just a case of you not being used to rowing 21-22 rates? your stroke rhythm etc will be all over the place if so, hence the monitor giving you very erratic lower stroke rate readings.
46 yo male 5'10 88kg (Rowing since june 9th 2016) PB's 5k 19:22 30min 7518m

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Ombrax
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Re: PM5 - is it in my head or?

Post by Ombrax » February 21st, 2017, 5:57 pm

Pure speculation: At a higher stroke rate 1 spm is a smaller % of the total, so perhaps you're less likely to be jumping all over the place.

Thought experiment: Imagine how hard it would be to precisely maintain 5 spm - your ability to do that would be practically nil, since it would be harder to control your rate at such a low level.

Edit: also for PM5 vs 3 and 5 - the way they handle the averaging of the rate over time maybe be different. One (say, the 3) might do more smoothing of the the data over time, while the 5 gives you a more unfiltered and jagged value.

Sort of like this (a random example):

Image

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