Concept2 Forum

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.

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...

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.

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):