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Heart rate very high since 5.50

dom
over 4 years ago

Over the last few weeks, I have got extremely high heart rates during runs, as this caused my VO2Max to drop dramatically I bought a Polar OH1+ optical HR strap a couple of days ago. Sure enough my reported HR dropped by about 30 to 40 BPM and my VO2Max has climbed 2 points in two days.

It is a real shame that I have to circumvent the 245 built in HRM like this. I never had any issues with the optical HR on my 645.

UPDATE 5th Dec 2020.

Although some people don't seem to think it relevant, my plummeting reported VO2Max is what alerted me to this issue as I don't generally obsess over precise HR values and the VO2Max is derived from the HR data. Since 24th Nov when I started using a Polar OH1+ HRM instead of the one built into the 245, my VO2Max has increased from 51 (the lowest I have ever seen) to 57.

In a normal course of events this would never happen.

  • 0 over 4 years ago in reply to 3001721

    The forum post announcing V5.50 was 18 days ago however looking back at my activities, the incredible HR values seem to go back to September but the dramatic decrease of VO2Max matches with the last 18 days.

    I suppose that I use VO2Max trend as more of a useful guide than absolute HR values.

  • Former Member
    0 Former Member over 4 years ago

    Good to hear that others are having this problem as well. My HR on runs bumped up by about 20-30 bpm after I plugged my watch in last Tuesday (11/24). When I set out on wednesday, the watch indicated that it had updated the sensor hub to v. 6.02 as well as the GPS. Since then, I've done different runs (short, long, workout) and all the readings have been high. Some comically high (200+ bpm for stretches of the workout and 180+ this morning on a very easy 8 miler). I've tried wearing the watch tighter but that doesn't help. An interesting wrinkle is that it doesn't seem that the full software update pushed with the sensor hub update (not sure if this is possible?). I manually updated the software to 5.50 over the weekend but no fixes on the runs this week.

  • 0 over 4 years ago

    I think that currently the ohr sensor firmware is infinitely more accurate than in previous versions, but on the contrary it is so sensitive that on many occasions it presents the problem that you have mentioned.

  • 0 over 4 years ago in reply to Trunning

    My understanding of the term accurate is closeness to the true value being measured, I don't think it can be regarded as achieving this currently. The Polar OH1+ strap I am using to get correct readings is obviously more accurate.

  • 0 over 4 years ago

    I have the same issue; extreme heart rates (190+ and I am 66!), average 160 on a mild run. Two days later with an older Garmin strap average 130! Has someone seen an explanation form Garmin for this behavior. How far do I have to downgrade for decent monitoring my heart rate with the watch?

  • 0 over 4 years ago in reply to 8051835

    I did a ride on Zwift yesterday and a run today whilst wearing my Forerunner 245 and my Polar OH1 as a reference. Both times the heartrates on both devices were spot-on and in line with expectations.. I don't know what went wrong the other times...:(

  • 0 over 4 years ago in reply to 8051835

    Did you specifically not have the OH1 paired with the 245 ?

  • 0 over 4 years ago in reply to dom

    I did. I started the autonomous recording on the OH1 by pushing the button twice after turning it on. As I connected the OH1 to Zwift yesterday I had 2 outputfiles in Garmin Connect. One for the results from my Zwift session (including heartrate from OH1) and one from the FR 245. The heartrates were exactly the same. Today I started a running session on the FR 245 and started an autonomous session on the OH1 aswell. The heartrate in Garmin Connect (From the FR 245) and in the Polar Flow app (for the OH1) were the same again.

  • 0 over 4 years ago in reply to dom

    Here you have the graph of my last run:

     

    HRM Run vs 245 OHR. Never had that accuracy on previous versions .

  • 0 over 4 years ago in reply to Trunning

    Here are two sets of metrics from Connect, one from a couple of weeks ago using the 245 inbuilt HR, the other with my Polar OH1 providing the HR information.

    Same Route, almost identical time - very different HR and hence Training Effect values In case you can't guess, the left hand one is using the inbuilt optical HR.