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This is a nice reading about this topic
https://valencell.com/blog/2015/10/optical-heart-rate-monitoring-what-you-need-to-know/
The chapter “What are the primary challenges with OHRM wearables?” points out the problems
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@Brad_Olwin Interesting life hack. Will try tomorrow… What about GPS and foot pod?
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@NickK said in Spartan Sport WHR Baro always reading HR too high at first few km while running:
@Brad_Olwin Interesting life hack. Will try tomorrow… What about GPS and foot pod?
I live/work at 5500 feet ~1600m in the Southwest (Boulder, CO) where there are few significant impediments to GPS so I rarely have GPS issues. I start my runs as soon as GPS locks on (usually a few seconds). Footpod, when I use one is Stryd and it is uncalibrated so the pace/distance/cadence all come from Stryd and not GPS. I typically use this only for intervals or when doing long races (Endurance mode) and I want better pace information.
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Today, for the first time, I had this problem.
I started walking (fast but not so fast
) and after a while I noticed HR going up with no reason. Once touched the gauge max I stopped and paused the activity (checking if I was dying by heart attack 
) put some air between the watch and the arm, then resumed … and started running, with HR back to normal.I don’t know if it has some relation with this or not, but once I paused the activity I’ve heard strange noises (like connection issue) in my BT earphones
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I think the problem comes from GPS antenna, because when I start a indoor running, the problem does not happen
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Any solution for this?
I always have an extreme peak at the beginning -
@auxina said in Spartan Sport WHR Baro always reading HR too high at first few km while running:
Any solution for this?
I always have an extreme peak at the beginningMy watch is working great. Everything I do just try to wear more tightly than usual and wait few minutes before hit start button
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@vietpq same for me… Constantly have a spike to 200bpm on spartan trainer for first 10 minutes, even if I run 6min/km. After that settles down. Annoying, I think it’s fixable by firmware, but hard to know. On the upside, it makes me warm up more, like others here.
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My WHR is just rubbish. During cycling or running, it stays for very long near my resting HR, then after maybe 15-20 minutes it shoots up but it’s far from anything accurate. During simple walking, it has sudden spikes. Comparing to the chest strap is not just a bit off, it’s totally wrong. It happened a few times I forgot my chest strap and had to rely on WRH ( SSWHR Baro ) and HR reading was just useless. I used to moan a lot about Fitbit Ionic device thinking that it cannot get any worse. I replaced it to SSWHR Baro to find out that indeed, it can
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@Adam-Bialogonski Did you try this : https://forum.suunto.com/topic/2120/suunto-9-ohr-readings
It improved a lot the OHR reading for me (that and wearing the watch 2-3cms from my wrist)
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@jean-william-cousin yes I did. One of the first thing I tried. I also made sure the watch is kept stable in that position using a sweatband before it so it would prevent sliding it down the wrist. Still nothing improved.
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@Adam-Bialogonski the solution is to warm up for 2 km, end run, then start a new run. (until, and big if, suunto fixes this…)
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related and I would love to hear if that helped
https://forum.suunto.com/topic/2120/suunto-9-ohr-readings/19
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@Adam-Bialogonski you should try to wear more tightly, it will help
