• Bizarre Heart monitor

    From Mark J cleary@mcleary08@comcast.net to rec.bicycles.tech on Sat Jan 31 09:41:02 2026
    From Newsgroup: rec.bicycles.tech

    I have been having trouble with my chest strap heart rate monitor
    picking up correct heart rate. I have a Coospro H6 not expensive but
    about 18 months old the straps do wear. I bought a new Garmin HRM 200
    but it did not pickup the HR correct either and was even worse. It did
    not record the projected respiration either. I sent it back to Garmin
    for refund.

    Today used the old Coospro riding and it went in out with drops in HR. I
    took it off my chest and removed the pod. I then used the Garmin watch I record with 945's regular optical sensor to pick up HR. That seem to not
    be working to well.

    So then I took the watch off put it back on handle bar nothing recording
    my HR. The watch keep showing my heart rate and it seemed at least more accurate. But there is no way it could since no sensor to pick it up.

    I then thought maybe my phone was interfering with data. I turned the
    phone off and poof the HR reading stopped. My question is how could the
    phone be picking up my heart rate even thought it does have the Garmin
    Trax app on it, but I was not using the app. Even if I was there was
    nothing on me to pick my heart rate.

    I am completely lost and AI suggest false reading based on some initial contact made by phone. I tell you this is nuts. To that end I did order
    a new coospro Heart rate monitor and strap the better one but still less
    than Garmins and works better. When I use that for the first time I am
    going to shut my phone down while riding and let my Garmin 945 pick up
    the heart rate. Possibly it will be accurate.
    --
    Deacon Mark

    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From Catrike Ryder@Soloman@old.bikers.org to rec.bicycles.tech on Sat Jan 31 12:16:13 2026
    From Newsgroup: rec.bicycles.tech

    On Sat, 31 Jan 2026 09:41:02 -0600, Mark J cleary
    <mcleary08@comcast.net> wrote:

    I have been having trouble with my chest strap heart rate monitor
    picking up correct heart rate. I have a Coospro H6 not expensive but
    about 18 months old the straps do wear. I bought a new Garmin HRM 200
    but it did not pickup the HR correct either and was even worse. It did
    not record the projected respiration either. I sent it back to Garmin
    for refund.

    Today used the old Coospro riding and it went in out with drops in HR. I >took it off my chest and removed the pod. I then used the Garmin watch I >record with 945's regular optical sensor to pick up HR. That seem to not
    be working to well.

    So then I took the watch off put it back on handle bar nothing recording
    my HR. The watch keep showing my heart rate and it seemed at least more >accurate. But there is no way it could since no sensor to pick it up.

    I then thought maybe my phone was interfering with data. I turned the
    phone off and poof the HR reading stopped. My question is how could the >phone be picking up my heart rate even thought it does have the Garmin
    Trax app on it, but I was not using the app. Even if I was there was
    nothing on me to pick my heart rate.

    I am completely lost and AI suggest false reading based on some initial >contact made by phone. I tell you this is nuts. To that end I did order
    a new coospro Heart rate monitor and strap the better one but still less >than Garmins and works better. When I use that for the first time I am
    going to shut my phone down while riding and let my Garmin 945 pick up
    the heart rate. Possibly it will be accurate.

    I've been using either of my two Garmen watches (Fenix 5x & Vivoactive
    4) for heart rate for some time now and I've never had any troubles.

    Way back when I was using the Garmen chest strap moniters I noticed
    that although you could put it on either way, it did not work well
    upside down.

    --
    C'est bon
    Soloman
    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From zen cycle@funkmasterxx@hotmail.com to rec.bicycles.tech on Sat Jan 31 12:18:39 2026
    From Newsgroup: rec.bicycles.tech

    On 1/31/2026 10:41 AM, Mark J cleary wrote:
    I have been having trouble with my chest strap heart rate monitor
    picking up correct heart rate. I have a Coospro H6 not expensive but
    about 18 months old the straps do wear. I bought a new Garmin HRM 200
    but it did not pickup the HR correct either and was even worse. It did
    not record the projected respiration either. I sent it back to Garmin
    for refund.

    Today used the old Coospro riding and it went in out with drops in HR. I took it off my chest and removed the pod. I then used the Garmin watch I record with 945's regular optical sensor to pick up HR. That seem to not
    be working to well.

    If you had the Coospro still within range of the watch, the watch may
    still have been picking it up. The bluetooth "radio" inside the H6
    likely stays on for quite a while even after you have taken it off your
    chest, so the 945 would still try to read it. You would have had to stop
    your activity and start a new one in order for the watch to transition
    to the optic reader.


    So then I took the watch off put it back on handle bar nothing recording
    my HR. The watch keep showing my heart rate and it seemed at least more accurate. But there is no way it could since no sensor to pick it up.

    Yes, that does seem strange. I'm not familiar with Coospro, but I know
    the Garmin NRM models do store data until the activity is stopped and
    the data transfer is complete. That may be the Coospro architecture as well.


    I then thought maybe my phone was interfering with data. I turned the
    phone off and poof the HR reading stopped. My question is how could the phone be picking up my heart rate even thought it does have the Garmin
    Trax app on it, but I was not using the app. Even if I was there was
    nothing on me to pick my heart rate.

    They all use the bluetooth connection scheme. If you had your phone on
    it was probably trying to read the H6 at the same time your watch was - essentially to bluetooth "masters" arguing over who gets the "slave"
    data. This shouldn't have been a problem with the Garmin
    watch/HRM200/Connect (phone app) combination - Garmin systems are
    designed to work exactly in that mode - but I could see issues trying to
    use a non-garmin hrm with a garmin watch while Connect was running over bluetooth.


    I am completely lost and AI suggest false reading based on some initial contact made by phone. I tell you this is nuts.

    no, That's pretty much true, for the reason I mentioned above.

    To that end I did order
    a new coospro Heart rate monitor and strap the better one but still less than Garmins and works better. When I use that for the first time I am
    going to shut my phone down while riding and let my Garmin 945 pick up
    the heart rate. Possibly it will be accurate.

    You don't need to shut your phone down, just turn off bluetooth and make
    sure Garmin Connect isn't running in the background. I have seen phone
    apps that use Bluetooth turn the radio back on even if you turn it off.
    You might also want to make sure you don't have any other apps running
    that use bluetooth just to make sure someone else isn't turning it back on.

    FWIW I've been using a Garmin HRM Pro+ with a 745 for a few years now
    without many problems, but then I generally don't have bluetooth on my
    phone turned on unless I need for for something. That said, I have
    frequently been out riding/running with my phone bluetooth connected to
    my headphones to stream music without any interference to the HR
    readings on the watch. However I don't have any apps running that may
    try to connect to the HRM (such as Garmin Connect or Strava).








    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From Catrike Ryder@Soloman@old.bikers.org to rec.bicycles.tech on Sat Jan 31 13:41:46 2026
    From Newsgroup: rec.bicycles.tech

    On Sat, 31 Jan 2026 12:18:39 -0500, zen cycle
    <funkmasterxx@hotmail.com> wrote:

    On 1/31/2026 10:41 AM, Mark J cleary wrote:
    I have been having trouble with my chest strap heart rate monitor
    picking up correct heart rate. I have a Coospro H6 not expensive but
    about 18 months old the straps do wear. I bought a new Garmin HRM 200
    but it did not pickup the HR correct either and was even worse. It did
    not record the projected respiration either. I sent it back to Garmin
    for refund.

    Today used the old Coospro riding and it went in out with drops in HR. I
    took it off my chest and removed the pod. I then used the Garmin watch I
    record with 945's regular optical sensor to pick up HR. That seem to not
    be working to well.

    If you had the Coospro still within range of the watch, the watch may
    still have been picking it up. The bluetooth "radio" inside the H6
    likely stays on for quite a while even after you have taken it off your >chest, so the 945 would still try to read it. You would have had to stop >your activity and start a new one in order for the watch to transition
    to the optic reader.


    So then I took the watch off put it back on handle bar nothing recording
    my HR. The watch keep showing my heart rate and it seemed at least more
    accurate. But there is no way it could since no sensor to pick it up.

    Yes, that does seem strange. I'm not familiar with Coospro, but I know
    the Garmin NRM models do store data until the activity is stopped and
    the data transfer is complete. That may be the Coospro architecture as well.


    I then thought maybe my phone was interfering with data. I turned the
    phone off and poof the HR reading stopped. My question is how could the
    phone be picking up my heart rate even thought it does have the Garmin
    Trax app on it, but I was not using the app. Even if I was there was
    nothing on me to pick my heart rate.

    They all use the bluetooth connection scheme. If you had your phone on
    it was probably trying to read the H6 at the same time your watch was - >essentially to bluetooth "masters" arguing over who gets the "slave"
    data. This shouldn't have been a problem with the Garmin >watch/HRM200/Connect (phone app) combination - Garmin systems are
    designed to work exactly in that mode - but I could see issues trying to
    use a non-garmin hrm with a garmin watch while Connect was running over >bluetooth.


    I am completely lost and AI suggest false reading based on some initial
    contact made by phone. I tell you this is nuts.

    no, That's pretty much true, for the reason I mentioned above.

    To that end I did order
    a new coospro Heart rate monitor and strap the better one but still less
    than Garmins and works better. When I use that for the first time I am
    going to shut my phone down while riding and let my Garmin 945 pick up
    the heart rate. Possibly it will be accurate.

    You don't need to shut your phone down, just turn off bluetooth and make >sure Garmin Connect isn't running in the background. I have seen phone
    apps that use Bluetooth turn the radio back on even if you turn it off.
    You might also want to make sure you don't have any other apps running
    that use bluetooth just to make sure someone else isn't turning it back on.

    FWIW I've been using a Garmin HRM Pro+ with a 745 for a few years now >without many problems, but then I generally don't have bluetooth on my
    phone turned on unless I need for for something. That said, I have >frequently been out riding/running with my phone bluetooth connected to
    my headphones to stream music without any interference to the HR
    readings on the watch. However I don't have any apps running that may
    try to connect to the HRM (such as Garmin Connect or Strava).



    I always have my Iphone's bluetooth running and connected to my Garmin
    watch, my headphones, and my Garmin Edge 530. I've never had any
    problems with any of that, but I don't wear a Garmin chest moniter any
    more. The watches work fine for my heart rate and the chest strap was
    not comfortable.

    --
    C'est bon
    Soloman
    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From Mark J cleary@mcleary08@comcast.net to rec.bicycles.tech on Sat Jan 31 13:46:44 2026
    From Newsgroup: rec.bicycles.tech

    On 1/31/2026 12:41 PM, Catrike Ryder wrote:
    On Sat, 31 Jan 2026 12:18:39 -0500, zen cycle
    <funkmasterxx@hotmail.com> wrote:

    On 1/31/2026 10:41 AM, Mark J cleary wrote:
    I have been having trouble with my chest strap heart rate monitor
    picking up correct heart rate. I have a Coospro H6 not expensive but
    about 18 months old the straps do wear. I bought a new Garmin HRM 200
    but it did not pickup the HR correct either and was even worse. It did
    not record the projected respiration either. I sent it back to Garmin
    for refund.

    Today used the old Coospro riding and it went in out with drops in HR. I >>> took it off my chest and removed the pod. I then used the Garmin watch I >>> record with 945's regular optical sensor to pick up HR. That seem to not >>> be working to well.

    If you had the Coospro still within range of the watch, the watch may
    still have been picking it up. The bluetooth "radio" inside the H6
    likely stays on for quite a while even after you have taken it off your
    chest, so the 945 would still try to read it. You would have had to stop
    your activity and start a new one in order for the watch to transition
    to the optic reader.


    So then I took the watch off put it back on handle bar nothing recording >>> my HR. The watch keep showing my heart rate and it seemed at least more
    accurate. But there is no way it could since no sensor to pick it up.

    Yes, that does seem strange. I'm not familiar with Coospro, but I know
    the Garmin NRM models do store data until the activity is stopped and
    the data transfer is complete. That may be the Coospro architecture as well. >>

    I then thought maybe my phone was interfering with data. I turned the
    phone off and poof the HR reading stopped. My question is how could the
    phone be picking up my heart rate even thought it does have the Garmin
    Trax app on it, but I was not using the app. Even if I was there was
    nothing on me to pick my heart rate.

    They all use the bluetooth connection scheme. If you had your phone on
    it was probably trying to read the H6 at the same time your watch was -
    essentially to bluetooth "masters" arguing over who gets the "slave"
    data. This shouldn't have been a problem with the Garmin
    watch/HRM200/Connect (phone app) combination - Garmin systems are
    designed to work exactly in that mode - but I could see issues trying to
    use a non-garmin hrm with a garmin watch while Connect was running over
    bluetooth.


    I am completely lost and AI suggest false reading based on some initial
    contact made by phone. I tell you this is nuts.

    no, That's pretty much true, for the reason I mentioned above.

    To that end I did order
    a new coospro Heart rate monitor and strap the better one but still less >>> than Garmins and works better. When I use that for the first time I am
    going to shut my phone down while riding and let my Garmin 945 pick up
    the heart rate. Possibly it will be accurate.

    You don't need to shut your phone down, just turn off bluetooth and make
    sure Garmin Connect isn't running in the background. I have seen phone
    apps that use Bluetooth turn the radio back on even if you turn it off.
    You might also want to make sure you don't have any other apps running
    that use bluetooth just to make sure someone else isn't turning it back on. >>
    FWIW I've been using a Garmin HRM Pro+ with a 745 for a few years now
    without many problems, but then I generally don't have bluetooth on my
    phone turned on unless I need for for something. That said, I have
    frequently been out riding/running with my phone bluetooth connected to
    my headphones to stream music without any interference to the HR
    readings on the watch. However I don't have any apps running that may
    try to connect to the HRM (such as Garmin Connect or Strava).



    I always have my Iphone's bluetooth running and connected to my Garmin
    watch, my headphones, and my Garmin Edge 530. I've never had any
    problems with any of that, but I don't wear a Garmin chest moniter any
    more. The watches work fine for my heart rate and the chest strap was
    not comfortable.

    --
    C'est bon
    Soloman
    The Garmin 945 has wrist optical HR and reasonably accurate but when
    doing intense riding and movement that are not nearly as accurate. All
    of them that I have had after awhile go bad my understanding is the
    strap gets bad that is the part picking up the HR electricity. The
    modules are generally ok.

    One another note if your run the Trax App for an indoor ride and try to
    run the Garmin at the same time it will cause all kinds of problems. You
    have to pick one or the other. I usually use the Garmin in free ride
    mode I don't use the erg. To me the erg mode sort of keeps momentum
    going and free ride is just the fly wheel.

    AI suggested the garmin on the handle bars could be sensing vibration
    and picking that up for a reading but once I shut the phone off no HR.
    RIght now sitting here says my HR is 46 and I counted and it is close I
    got 42.
    --
    Deacon Mark
    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From Catrike Ryder@Soloman@old.bikers.org to rec.bicycles.tech on Sat Jan 31 15:24:03 2026
    From Newsgroup: rec.bicycles.tech

    On Sat, 31 Jan 2026 13:46:44 -0600, Mark J cleary
    <mcleary08@comcast.net> wrote:

    On 1/31/2026 12:41 PM, Catrike Ryder wrote:
    On Sat, 31 Jan 2026 12:18:39 -0500, zen cycle
    <funkmasterxx@hotmail.com> wrote:

    On 1/31/2026 10:41 AM, Mark J cleary wrote:
    I have been having trouble with my chest strap heart rate monitor
    picking up correct heart rate. I have a Coospro H6 not expensive but
    about 18 months old the straps do wear. I bought a new Garmin HRM 200
    but it did not pickup the HR correct either and was even worse. It did >>>> not record the projected respiration either. I sent it back to Garmin
    for refund.

    Today used the old Coospro riding and it went in out with drops in HR. I >>>> took it off my chest and removed the pod. I then used the Garmin watch I >>>> record with 945's regular optical sensor to pick up HR. That seem to not >>>> be working to well.

    If you had the Coospro still within range of the watch, the watch may
    still have been picking it up. The bluetooth "radio" inside the H6
    likely stays on for quite a while even after you have taken it off your
    chest, so the 945 would still try to read it. You would have had to stop >>> your activity and start a new one in order for the watch to transition
    to the optic reader.


    So then I took the watch off put it back on handle bar nothing recording >>>> my HR. The watch keep showing my heart rate and it seemed at least more >>>> accurate. But there is no way it could since no sensor to pick it up.

    Yes, that does seem strange. I'm not familiar with Coospro, but I know
    the Garmin NRM models do store data until the activity is stopped and
    the data transfer is complete. That may be the Coospro architecture as well.


    I then thought maybe my phone was interfering with data. I turned the
    phone off and poof the HR reading stopped. My question is how could the >>>> phone be picking up my heart rate even thought it does have the Garmin >>>> Trax app on it, but I was not using the app. Even if I was there was
    nothing on me to pick my heart rate.

    They all use the bluetooth connection scheme. If you had your phone on
    it was probably trying to read the H6 at the same time your watch was -
    essentially to bluetooth "masters" arguing over who gets the "slave"
    data. This shouldn't have been a problem with the Garmin
    watch/HRM200/Connect (phone app) combination - Garmin systems are
    designed to work exactly in that mode - but I could see issues trying to >>> use a non-garmin hrm with a garmin watch while Connect was running over
    bluetooth.


    I am completely lost and AI suggest false reading based on some initial >>>> contact made by phone. I tell you this is nuts.

    no, That's pretty much true, for the reason I mentioned above.

    To that end I did order
    a new coospro Heart rate monitor and strap the better one but still less >>>> than Garmins and works better. When I use that for the first time I am >>>> going to shut my phone down while riding and let my Garmin 945 pick up >>>> the heart rate. Possibly it will be accurate.

    You don't need to shut your phone down, just turn off bluetooth and make >>> sure Garmin Connect isn't running in the background. I have seen phone
    apps that use Bluetooth turn the radio back on even if you turn it off.
    You might also want to make sure you don't have any other apps running
    that use bluetooth just to make sure someone else isn't turning it back on. >>>
    FWIW I've been using a Garmin HRM Pro+ with a 745 for a few years now
    without many problems, but then I generally don't have bluetooth on my
    phone turned on unless I need for for something. That said, I have
    frequently been out riding/running with my phone bluetooth connected to
    my headphones to stream music without any interference to the HR
    readings on the watch. However I don't have any apps running that may
    try to connect to the HRM (such as Garmin Connect or Strava).



    I always have my Iphone's bluetooth running and connected to my Garmin
    watch, my headphones, and my Garmin Edge 530. I've never had any
    problems with any of that, but I don't wear a Garmin chest moniter any
    more. The watches work fine for my heart rate and the chest strap was
    not comfortable.

    --
    C'est bon
    Soloman
    The Garmin 945 has wrist optical HR and reasonably accurate but when
    doing intense riding and movement that are not nearly as accurate. All
    of them that I have had after awhile go bad my understanding is the
    strap gets bad that is the part picking up the HR electricity. The
    modules are generally ok.

    One another note if your run the Trax App for an indoor ride and try to
    run the Garmin at the same time it will cause all kinds of problems. You >have to pick one or the other. I usually use the Garmin in free ride
    mode I don't use the erg. To me the erg mode sort of keeps momentum
    going and free ride is just the fly wheel.

    AI suggested the garmin on the handle bars could be sensing vibration
    and picking that up for a reading but once I shut the phone off no HR.
    RIght now sitting here says my HR is 46 and I counted and it is close I
    got 42.

    I don't know about the strap picking up the heart rate signal. I
    replaced the straps on both my Garmin watches with Hemsut velcro
    straps. My Fenix 5X is 7+ years old and it's heart rate measurements
    are always very close to my finger clamp device and my Blood Pressure
    moniter. The Fenix is the watch I almost always use for my bike ride
    HR

    --
    C'est bon
    Soloman
    --- Synchronet 3.21b-Linux NewsLink 1.2
  • From zen cycle@funkmasterxx@hotmail.com to rec.bicycles.tech on Sat Jan 31 16:14:46 2026
    From Newsgroup: rec.bicycles.tech

    On 1/31/2026 2:46 PM, Mark J cleary wrote:
    On 1/31/2026 12:41 PM, Catrike Ryder wrote:
    On Sat, 31 Jan 2026 12:18:39 -0500, zen cycle
    <funkmasterxx@hotmail.com> wrote:

    On 1/31/2026 10:41 AM, Mark J cleary wrote:
    I have been having trouble with my chest strap heart rate monitor
    picking up correct heart rate. I have a Coospro H6 not expensive but
    about 18 months old the straps do wear. I bought a new Garmin HRM 200
    but it did not pickup the HR correct either and was even worse. It did >>>> not record the projected respiration either. I sent it back to Garmin
    for refund.

    Today used the old Coospro riding and it went in out with drops in
    HR. I
    took it off my chest and removed the pod. I then used the Garmin
    watch I
    record with 945's regular optical sensor to pick up HR. That seem to
    not
    be working to well.

    If you had the Coospro still within range of the watch, the watch may
    still have been picking it up. The bluetooth "radio" inside the H6
    likely stays on for quite a while even after you have taken it off your
    chest, so the 945 would still try to read it. You would have had to stop >>> your activity and start a new one in order for the watch to transition
    to the optic reader.


    So then I took the watch off put it back on handle bar nothing
    recording
    my HR. The watch keep showing my heart rate and it seemed at least more >>>> accurate. But there is no way it could since no sensor to pick it up.

    Yes, that does seem strange. I'm not familiar with Coospro, but I know
    the Garmin NRM models do store data until the activity is stopped and
    the data transfer is complete. That may be the Coospro architecture
    as well.


    I then thought maybe my phone was interfering with data. I turned the
    phone off and poof the HR reading stopped. My question is how could the >>>> phone be picking up my heart rate even thought it does have the Garmin >>>> Trax app on it, but I was not using the app. Even if I was there was
    nothing on me to pick my heart rate.

    They all use the bluetooth connection scheme. If you had your phone on
    it was probably trying to read the H6 at the same time your watch was -
    essentially to bluetooth "masters" arguing over who gets the "slave"
    data. This shouldn't have been a problem with the Garmin
    watch/HRM200/Connect (phone app) combination - Garmin systems are
    designed to work exactly in that mode - but I could see issues trying to >>> use a non-garmin hrm with a garmin watch while Connect was running over
    bluetooth.


    I am completely lost and AI suggest false reading based on some initial >>>> contact made by phone. I tell you this is nuts.

    no, That's pretty much true, for the reason I mentioned above.

    To that end I did order
    a new coospro Heart rate monitor and strap the better one but still
    less
    than Garmins and works better. When I use that for the first time I am >>>> going to shut my phone down while riding and let my Garmin 945 pick up >>>> the heart rate. Possibly it will be accurate.

    You don't need to shut your phone down, just turn off bluetooth and make >>> sure Garmin Connect isn't running in the background. I have seen phone
    apps that use Bluetooth turn the radio back on even if you turn it off.
    You might also want to make sure you don't have any other apps running
    that use bluetooth just to make sure someone else isn't turning it
    back on.

    FWIW I've been using a Garmin HRM Pro+ with a 745 for a few years now
    without many problems, but then I generally don't have bluetooth on my
    phone turned on unless I need for for something. That said, I have
    frequently been out riding/running with my phone bluetooth connected to
    my headphones-a to stream music without any interference to the HR
    readings on the watch. However I don't have any apps running that may
    try to connect to the HRM (such as Garmin Connect or Strava).



    I always have my Iphone's bluetooth running and connected to my Garmin
    watch, my headphones, and my Garmin Edge 530. I've never had any
    problems with any of that, but I don't wear a Garmin chest moniter any
    more. The watches work fine for my heart rate and the chest strap was
    not comfortable.

    --
    C'est bon
    Soloman

    The Garmin 945 has wrist optical HR and reasonably accurate but when
    doing intense riding and movement that are not nearly as accurate.

    Yup, One of the big complaints about optic HR is unreliability during activity. IT has to do mostly with motion of the optic device against
    the skin. The Whoop Strap does a great job since it holds the optics stationary against the skin, but my experience is that sweat also fouls
    up the readings - I've tried it on the bike indoors and it consistently
    starts very poor reading once I start sweating.

    All
    of them that I have had after awhile go bad my understanding is the
    strap gets bad that is the part picking up the HR electricity. The
    modules are generally ok.

    Yup again, known issues with chest straps.


    One another note if your run the Trax App for an indoor ride and try to
    run the Garmin at the same time it will cause all kinds of problems. You have to pick one or the other. I usually use the Garmin in free ride
    mode I don't use the erg. To me the erg mode sort of keeps momentum
    going and free ride is just the fly wheel.

    Are you running the Trax app though your phone as well? if so, that's
    the problem. You have two apps trying to control the Bluetooth link to
    the same senor.


    AI suggested the garmin on the handle bars could be sensing vibration
    and picking that up for a reading

    AI is wrong alot. This is one of those times. Vibration has nothing to
    do with how a wireless BLE or ANT+ device communications.

    but once I shut the phone off no HR.

    I think you may need to stop and start the watch again once you shut off
    the phone.

    RIght now sitting here says my HR is 46 and I counted and it is close I
    got 42.


    Pretty good resting HR! Mine only gets that low when I'm sleeping, but
    then I'll still hit well over 180 in a sprint https://www.strava.com/activities/17070328987
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  • From Catrike Ryder@Soloman@old.bikers.org to rec.bicycles.tech on Sat Jan 31 17:23:12 2026
    From Newsgroup: rec.bicycles.tech

    On Sat, 31 Jan 2026 15:24:03 -0500, Catrike Ryder
    <Soloman@old.bikers.org> wrote:

    On Sat, 31 Jan 2026 13:46:44 -0600, Mark J cleary
    <mcleary08@comcast.net> wrote:

    On 1/31/2026 12:41 PM, Catrike Ryder wrote:
    On Sat, 31 Jan 2026 12:18:39 -0500, zen cycle
    <funkmasterxx@hotmail.com> wrote:

    On 1/31/2026 10:41 AM, Mark J cleary wrote:
    I have been having trouble with my chest strap heart rate monitor
    picking up correct heart rate. I have a Coospro H6 not expensive but >>>>> about 18 months old the straps do wear. I bought a new Garmin HRM 200 >>>>> but it did not pickup the HR correct either and was even worse. It did >>>>> not record the projected respiration either. I sent it back to Garmin >>>>> for refund.

    Today used the old Coospro riding and it went in out with drops in HR. I >>>>> took it off my chest and removed the pod. I then used the Garmin watch I >>>>> record with 945's regular optical sensor to pick up HR. That seem to not >>>>> be working to well.

    If you had the Coospro still within range of the watch, the watch may
    still have been picking it up. The bluetooth "radio" inside the H6
    likely stays on for quite a while even after you have taken it off your >>>> chest, so the 945 would still try to read it. You would have had to stop >>>> your activity and start a new one in order for the watch to transition >>>> to the optic reader.


    So then I took the watch off put it back on handle bar nothing recording >>>>> my HR. The watch keep showing my heart rate and it seemed at least more >>>>> accurate. But there is no way it could since no sensor to pick it up. >>>>
    Yes, that does seem strange. I'm not familiar with Coospro, but I know >>>> the Garmin NRM models do store data until the activity is stopped and
    the data transfer is complete. That may be the Coospro architecture as well.


    I then thought maybe my phone was interfering with data. I turned the >>>>> phone off and poof the HR reading stopped. My question is how could the >>>>> phone be picking up my heart rate even thought it does have the Garmin >>>>> Trax app on it, but I was not using the app. Even if I was there was >>>>> nothing on me to pick my heart rate.

    They all use the bluetooth connection scheme. If you had your phone on >>>> it was probably trying to read the H6 at the same time your watch was - >>>> essentially to bluetooth "masters" arguing over who gets the "slave"
    data. This shouldn't have been a problem with the Garmin
    watch/HRM200/Connect (phone app) combination - Garmin systems are
    designed to work exactly in that mode - but I could see issues trying to >>>> use a non-garmin hrm with a garmin watch while Connect was running over >>>> bluetooth.


    I am completely lost and AI suggest false reading based on some initial >>>>> contact made by phone. I tell you this is nuts.

    no, That's pretty much true, for the reason I mentioned above.

    To that end I did order
    a new coospro Heart rate monitor and strap the better one but still less >>>>> than Garmins and works better. When I use that for the first time I am >>>>> going to shut my phone down while riding and let my Garmin 945 pick up >>>>> the heart rate. Possibly it will be accurate.

    You don't need to shut your phone down, just turn off bluetooth and make >>>> sure Garmin Connect isn't running in the background. I have seen phone >>>> apps that use Bluetooth turn the radio back on even if you turn it off. >>>> You might also want to make sure you don't have any other apps running >>>> that use bluetooth just to make sure someone else isn't turning it back on.

    FWIW I've been using a Garmin HRM Pro+ with a 745 for a few years now
    without many problems, but then I generally don't have bluetooth on my >>>> phone turned on unless I need for for something. That said, I have
    frequently been out riding/running with my phone bluetooth connected to >>>> my headphones to stream music without any interference to the HR
    readings on the watch. However I don't have any apps running that may
    try to connect to the HRM (such as Garmin Connect or Strava).



    I always have my Iphone's bluetooth running and connected to my Garmin
    watch, my headphones, and my Garmin Edge 530. I've never had any
    problems with any of that, but I don't wear a Garmin chest moniter any
    more. The watches work fine for my heart rate and the chest strap was
    not comfortable.

    --
    C'est bon
    Soloman
    The Garmin 945 has wrist optical HR and reasonably accurate but when
    doing intense riding and movement that are not nearly as accurate. All
    of them that I have had after awhile go bad my understanding is the
    strap gets bad that is the part picking up the HR electricity. The
    modules are generally ok.

    One another note if your run the Trax App for an indoor ride and try to >>run the Garmin at the same time it will cause all kinds of problems. You >>have to pick one or the other. I usually use the Garmin in free ride
    mode I don't use the erg. To me the erg mode sort of keeps momentum
    going and free ride is just the fly wheel.

    AI suggested the garmin on the handle bars could be sensing vibration
    and picking that up for a reading but once I shut the phone off no HR. >>RIght now sitting here says my HR is 46 and I counted and it is close I >>got 42.

    I don't know about the strap picking up the heart rate signal. I
    replaced the straps on both my Garmin watches with Hemsut velcro
    straps. My Fenix 5X is 7+ years old and it's heart rate measurements
    are always very close to my finger clamp device and my Blood Pressure >moniter. The Fenix is the watch I almost always use for my bike ride
    HR

    Ahhh. my mistake you were referring to the strap on the chest strap,
    not the watch. I'm going to bow out of this conversation now.

    --
    C'est bon
    Soloman
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