Suunto Smart Heart Rate Belt 2

HonzaS

@atoponce So I’m curious what you’ll get with new SHRM2. I hope you’ll be satisfied. I just remembered one more thing. Have you ever tried moving the chest strap about 5cm to the left under your left breast? I use it this way because it produces the greatest amplitude in this position and even Polar recommends it…

atoponce

@HonzaS I just got my new SHRB2 this morning and took it for its maiden voyage for my afternoon easy run. The plus side, Suunto and Stryd mostly agree on the running dynamics. At least I’m not bothered by the differences, given that the SHRB2 is at my chest and Stryd at my feet.

Metric	Suunto SHRB2	Stryd NextGen Duo
Cadence	169 spm	169 spm
Stride Length	102 cm	1.01 m
GCT	310 ms	295 ms
GCT Balance	50.2% - 49.8%	49.4% L / 50.6% R
Vertical Oscillation	7.0 cm	6.02 cm
Flight time	397 ms	415 ms (derived)
GCT:FT Ratio	78.1%	71.1% (derived)

To answer your question though, I haven’t shifted the belt left to align the module more over the heart. That’s something worth checking. I’ll give that a go tomorrow.

On this easy run, I did see artifacts on par with my Polar H10. The first ~18 minutes are noisy and the last ~25 minutes also. The route is flat with very little wind.

Actually, looking closer as I type this, that noise is when I had a headwind. It was a very light breeze, barely noticeable, but the timing does align. I was in a headwind until ~19:20 I turned around with a tailwind. I turned back around into a headwind at ~43:00 and remained in it until getting home.

Curious.

atoponce

Speaking of which, if I pair both my Stryd pods and the SHRB2 to my Race S, which one is the source of pace and distance? Any way to find out?

Squirrel

@atoponce said:

which one is the source of pace and distance? Any way to find out?

Yeah, one person wears the watch and strap, other person stationary wears stryd pods.
Run around within connection distance.
Then switch the watch to other person and repeat the test.
Then remove the pods while belt is also stationary, and repeat test to rule out the watch is the source.
(watch is always running in all 3 tests…)

Tieutieu

Tieutieu said:

Belt itself ~~wider than the old one~~ Exactly same size and hight

I have corrected myself…at sight it seems wider but it’s exactly same hight…

HonzaS

@atoponce said:

Actually, looking closer as I type this, that noise is when I had a headwind.

So that could be noise from static electricity if You wear loose nylon t-shirt.

snow*

@atoponce still rather noisy. For what it’s worth I make sure to position the sensor so that it doesn’t interfere with the running vest

atoponce

@snow Thanks, but I’m not wearing a vest. Just a tanktop. If I’m out for long runs though, I prefer waist belts.

martintrail

Everything’s fine for me so far, the belt fits nicely. The only thing I’m struggling with is the black Suunto logo on the sensor. It used to be a reference point for me, and now that it’s dark in the morning, I have to check more carefully to make sure the belt is turned the right way. It’s a small ergonomic thing, but the white logo on my old belt used to help me.

Egika

@martintrail said:

Everything’s fine for me so far, the belt fits nicely. The only thing I’m struggling with is the black Suunto logo on the sensor. It used to be a reference point for me, and now that it’s dark in the morning, I have to check more carefully to make sure the belt is turned the right way. It’s a small ergonomic thing, but the white logo on my old belt used to help me.

now you have the tactile feedback of the button instead for positioning

martintrail

@Egika Oh, right! I didn’t think of that thanks

Tieutieu

100km trail running race last w-end with my SV1 and the new belt : now that it’s well adjusted, it’s as confortable as the old one. And it doesn’t fall down in time.
Race metric in SA afterwards are limited with SV1 vs SRs, as mentionned.

martintrail

Hmm, I guess I cursed it. Today, ZoneSence didn’t start working until the end of my run. That never happened with my old heart rate monitor. What could it be?

isazi

@martintrail how’s the R-R plot?

martintrail

@isazi I see there are some unusual drops there. Could it be because the belt was too dry?

isazi

@martintrail if I am not mistaken, this is the HR plot, but the drops usually correlate with bad IBI data. If you can get the R-R plot, you should see noise

martintrail

@isazi Hmm, I don’t have any service that would show me that. Once I figure it out, I’ll send it here…

snow*

@martintrail said:

@isazi Hmm, I don’t have any service that would show me that. Once I figure it out, I’ll send it here…

e.g. Runalyze tracks that data

martintrail

@isazi

snow*

@martintrail weird! it’s perfect