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Training Effect is much lower using BLE Heartstrap against using ANT+ Heartstrap

mbietz
over 6 years ago
The Training Effect is much lower if you use an BLE Heartstrap. The value is much higher with an ANT+ strap.

Here are some Trainings from me, where you can see the difference

TE 3.0 , Heartstrap BLE
https://connect.garmin.com/modern/activity/3113632016
TE 3.6 , Heartstrap ANT+
https://connect.garmin.com/modern/activity/3117597823


And even worse one Training which i did with two Heartstraps at the same time, recording on two devices,
TE 4.0, Heartstrap ANT+, telling me 41 Hours Recovery Time
https://connect.garmin.com/modern/activity/3119901503

TE 3.0, Heartstrap BLE, Telling me 23 Hours Recovery Time
https://connect.garmin.com/modern/activity/3119896226


Did anyone also noticed this strange behaviour ?
Which one is right ?

I mean 23 or 41 Hours Recovery Time is a significiant difference.
  • Former Member
    0 Former Member over 6 years ago
    Interesting. I haven't used a BLE strap so I can't compare. I'd also like to know if others see this difference and if they do, which is correct? What's odd is your duration, average HR and Max HR are nearly spot on while using the straps separately, and identical when worn at the same time. The TE and recovery numbers should match.
  • Former Member
    0 Former Member over 6 years ago
    The Training Effect is much lower if you use an BLE Heartstrap. The value is much higher with an ANT+ strap.

    Here are some Trainings from me, where you can see the difference

    TE 3.0 , Heartstrap BLE
    https://connect.garmin.com/modern/activity/3113632016
    TE 3.6 , Heartstrap ANT+
    https://connect.garmin.com/modern/activity/3117597823


    And even worse one Training which i did with two Heartstraps at the same time, recording on two devices,
    TE 4.0, Heartstrap ANT+, telling me 41 Hours Recovery Time
    https://connect.garmin.com/modern/activity/3119901503

    TE 3.0, Heartstrap BLE, Telling me 23 Hours Recovery Time
    https://connect.garmin.com/modern/activity/3119896226


    Did anyone also noticed this strange behaviour ?
    Which one is right ?

    I mean 23 or 41 Hours Recovery Time is a significiant difference.

    Yes, I have the same observation, using a Fenix 5 with Garmin HRM-run compared to a Suunto BLE HRM. The latter gives lower training effect.

  • 0 over 6 years ago
    Looking very carefully at the two HR traces for the same activity, the Garmin strap seems to record slightly more detail (in terms of micro peaks and troughs) than the Suunto strap. Not sure why this would influence training effect.
  • Former Member
    0 Former Member over 6 years ago
    Any chance this maybe has to do with heartrate variability data not properly available on the BLE strap? Garmin uses RR interval data for stuff like lactate threshold detection, so maybe it also ties into TE calculation.
  • 0 over 6 years ago
    well you're comparing apples with oranges; although it's the same wattage / workout...it's one day apart. you should record it on the same day with a similar configured head unit (hr zones, etc) on the same day. also, your time in zone3 (30$ %vs 24%) might be responsible for those extra 0.6 in training effect. and as others said - r-r data - on wednesday you were probably better rested compared to thursday, hence the lower te as well.
  • 0 over 6 years ago
    well, tsofron.

    i did indeed one training on saturday, the last two links in my first posting.
    This was done at the same time with similar comfigured units.
    And the gap in TE is even worse 3.0 to 4.0.
    How do you explain that?

    Well, i did some more testing and it is totally obvious.
    You should avoid using BLE HeartStrap if you are using Garmin devices, if you want to believe in TE, Training Status and Recovery Time.

    I will contact the garmin support, to get further more infos about that bug.

  • 0 over 6 years ago
    what kind of bl hrm are you using? as pointed out - the ble hrm might not record/transmit r-r (hrv) data - and hrv is used in the computation of the te. basically that information tells you how rested you are - and if that data is not transmitted, the fenix5 would just give you a lower score, as it considers you're in good shape. you should do the experiment the other way around - pair the ant+ to the fenix and the bluetooth to the edge, see how that goes.
  • 0 over 6 years ago
    The BLE HeartStrrap is a Polar H10, which records and transmits r-r (hrv).
    Well, lets see what garmin support will say about this issue.
  • 0 over 6 years ago
    I also notice than a BLE HeartStrap is more filtered than ANT+ one. I tried with Polar H7 and a noname one. I also tried on my HomeTrainer and it is the same effect. So it's not due to Fenix5/935 watch. Seems thant BLE is used with less data bandwith than ANT+, strange.