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Dec 2020
12:19pm, 26 Dec 2020
4,936 posts
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Windsor Wool
I only use the CooSpo on the bike Baz but had no issues with it yet.
Santa brought me a Garmin HR-pro yesterday. So expensive that it’s not the kinda thing I’d buy myself so it’s a good gift. It paired quickly this morning and now I have lots of other stats that I may only look at if Larkim can get me in to them 😂!
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Dec 2020
12:23pm, 26 Dec 2020
32,704 posts
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SPR
Larkim is the polar OH1+ evangelist so I think you're safe WW 
I have been tempted to get the run dynamics pod but it's too expensive for just something that would be interesting rather than definitely beneficial.
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Dec 2020
12:24pm, 26 Dec 2020
32,705 posts
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SPR
Presumably you won't need the CooSpo for the bike anymore given you have the Garmin HR pro?
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Dec 2020
12:35pm, 26 Dec 2020
4,267 posts
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K5 Gus
The reviews I've seen then I agree the accuracy in terms of high/low HR readings while doing intervals can be very close, eg within 1 bpm as you say, but there does seem to always be a slight lag in the optical readings. This was mentioned a few times by DCR in his review of the OH1+.
I think that's just the nature of reading the blood flow in your arm, as opposed to monitoring the actual beats of the heart. When your heart starts beating faster it takes a couple of seconds for the increased blood flow to reach down your arm.
At our level I doubt a problem for anyone, but as I said, the heart rate readings are more accurate when you take both actual high/low numbers as well as timeliness into account
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Dec 2020
12:46pm, 26 Dec 2020
32,708 posts
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SPR
Agree there will be some lag (that's the 1 bpm difference essentially). The graph shape for HR is exactly the same though. Badger said he had to shift his a couple of secs to get the graph shape to perfectly overlay.
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Dec 2020
12:50pm, 26 Dec 2020
32,709 posts
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SPR
The 1 bpm I was referring to was average not at an instance in time just to be clear (so wouldn't be high low where it's more likely to match as long as the high/ low isn't right at the end).
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Dec 2020
1:17pm, 26 Dec 2020
4,937 posts
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Windsor Wool
SPR - the bike is set up elsewhere in the house. There’s so many gadgets required for a decent Zwift session that having a dedicated HRM for that purpose is a real benefit for the aged / forgetful, particularly for £17 or whatever it was!
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Dec 2020
8:31pm, 26 Dec 2020
2,383 posts
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Oranj
I wouldn't get the CooSpo one for running. I found it reads about 10 beats higher than my Garmin HR chest strap when I'm running. It's fine when I'm cycling so I think that perhaps the pod rattles around too much when running and that makes it read high.
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Dec 2020
7:21am, 27 Dec 2020
3,339 posts
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J2R
My CooSpo strap is accurate, I've had no problems with it.
For some reason the wrist based HRM of my Polar M430 watch, which has never been reliable for me, has now become pretty well useless and gives a false reading most of the time. Puzzled as to how it could change.
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Jan 2021
6:54pm, 10 Jan 2021
3,352 posts
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J2R
OK, I know I knew this once but my tired old brain has let go of it...
What are the typical heart rate percentage thresholds, Karvonen formula, for a) a 3 zone system and b) a 5 zone system? (My understanding is that in a 3 zone system, zone 1 would normally equate to zones 1-3 of the 5 zone system, but that's maybe just something from a polarized training background).
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