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Polar V800? (yet another Garmin HRM fail)
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Andy916




Joined: 08 Oct 2011
Posts: 691
Location: Cambridge

PostPosted: Mon Aug 06, 2018 10:07 am    Post subject: Reply with quote

stenard wrote:
Andy916 wrote:

The old Polar gave me HR for the swim, but it would fail half the time, especially when non-wetsuit. I suspect it was losing pickup due to being dislodged by body rotation, so I wonder if the current Garmin straps suffers the same fate?

I guess my next monitor in a couple of years will have optical instead of chest strap...

On the former, no. The newer Garmin and Suunto HR straps that do swimming HR cache the HR data and then transmit it afterwards. So it doesn't rely on a consistent connection in the water (ant+ and BT can't transmit more than a few cm underwater anyway).


No, as I said, the problem with my old Polar strap (soft one) was that it moved around on the chest with body rotation, losing the tiny electrical signals from the heart. Transmission from strap to monitor was fine. A wetsuit helped keep the strap in place, but it was still hit and miss. When it did work, the trace from a frantic swim start was quite interesting.
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stenard




Joined: 04 Sep 2013
Posts: 1863

PostPosted: Mon Aug 06, 2018 11:27 am    Post subject: Reply with quote

Andy916 wrote:
stenard wrote:
Andy916 wrote:

The old Polar gave me HR for the swim, but it would fail half the time, especially when non-wetsuit. I suspect it was losing pickup due to being dislodged by body rotation, so I wonder if the current Garmin straps suffers the same fate?

I guess my next monitor in a couple of years will have optical instead of chest strap...

On the former, no. The newer Garmin and Suunto HR straps that do swimming HR cache the HR data and then transmit it afterwards. So it doesn't rely on a consistent connection in the water (ant+ and BT can't transmit more than a few cm underwater anyway).


No, as I said, the problem with my old Polar strap (soft one) was that it moved around on the chest with body rotation, losing the tiny electrical signals from the heart. Transmission from strap to monitor was fine. A wetsuit helped keep the strap in place, but it was still hit and miss. When it did work, the trace from a frantic swim start was quite interesting.

Ah, I misinterpreted what you meant by "losing pickup". I thought you meant the body rotation was interfering with the signal transmission, like people have with power meter signals and their watch if it's on the wrong wrist.

Garmin do a specific "swim" one that's more sticky for guys swimming in the pool. It works ok, but as I've said on a previous thread, the fabric bit of the strap is overly susceptible to chlorine corrosion even if you wash religiously after every use, so that's a bit of a flaw.
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Andy916




Joined: 08 Oct 2011
Posts: 691
Location: Cambridge

PostPosted: Mon Aug 06, 2018 1:16 pm    Post subject: Reply with quote

stenard wrote:

Garmin do a specific "swim" one that's more sticky for guys swimming in the pool. It works ok, but as I've said on a previous thread, the fabric bit of the strap is overly susceptible to chlorine corrosion even if you wash religiously after every use, so that's a bit of a flaw.


Aye, I've seen one (just the one) in use in our local pool and it looked broader than all of my older chest-straps. As well as minor movement my Polar straps were prone to ending up around my waist when pushing off the side of the pool (I was disinclined to pull it massively tight)
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