How important is heart rate to the TR AI?

I have a Garmin dual heart rate strap that has started devouring batteries in under a month. I’m letting the current battery drain and then tossing it (it’s def the computer draining it and not keeping st the strap needing to be cleaned, I take the computer off and store it on a shelf so the contacts can’t complete a circuit and it still drains massively between sessions.)

I discovered recently that my forerunner 745 watch can broadcast heart rate, so I can switch to it, but it made me think: how important is heart rate to the AI? I use a power meter for my TR workouts, so don’t need the heart rate info coming in. I know it’s helpful to see while I’m riding, but if TR doesn’t capture the heart rate data would it affect how the AI determines things like FTP, RLGL, adaptations, etc?

2 Likes

I haven’t used HR as a measurement for almost 12 months so I hope it’s not important lol. That said I have bumped from 3.5 to 4.2 w/kg in that time from the Ai’s prompts.

Not related to your question but if you’re in the market for a new HRM have you seen this? I’ve got one on pre-order as my HRM dual living is on borrowed time. All the battery cover screw points on mine are broken and the cover is held on with tape :laughing:

Some nice features on the new model, including 3 concurrent Bluetooth connections, data encryption and a low battery indicator LED. Nice price point too.

1 Like

I fixed my Garmin strap by taking the battery out and leaving it open in a warm place overnight so any moisture that might have gotten in could evaporate.

1 Like

Funny. My garmin dual has just died too. Swapped for a rechargeable wahoo.

I think this is secret sauce territory.

In your place I would switch to the forerunner HR, and stick with it for consistency. They have indicated the HR data is interpreted but I don’t believe they’ve said how.

I rarely look at cycling HR but it’s kind of useful in some situations - I’m using a gym bike occasionally that feels awfully hard, and the fact my HR is ten beats higher for the same power confirms I’m working harder, for whatever reason. I also note if my HR is varying on typical endurance efforts, as a fitness indicator at the beginning of the season and before a big endurance event.

1 Like

I lost mine a couple of months ago, using FR265 instead. Prefer chest for in season though.

In your place I would switch to the forerunner HR, and stick with it for consistency. They have indicated the HR data is interpreted but I don’t believe they’ve said how.

I rarely look at cycling HR but it’s kind of useful in some situations - I’m using a gym bike occasionally that feels awfully hard, and the fact my HR is ten beats higher for the same power confirms I’m working harder, for whatever reason. I also note if my HR is varying on typical endurance efforts, as a fitness indicator at the beginning of the season and before a big endurance event.

Yeah I’m def planning on just going with my watch. I like seeing heart rate during workouts as a way of seeing when I’m pinned or using it as an indicator of if I’m pulling my effort back down after a hard interval, but that’s kind of it. I also like that my watch is effectively already a rechargeable heart rate monitor vs needing to use non rechargeable coin cells that are also an irritant to replace if they’re going out in two to three weeks instead of yearly :confused:

But yeah, the data consistency is a good point and I do suspect TR uses the heart rate data for evaluations, I just didn’t know if going without would make a detrimental difference.

I fixed my Garmin strap by taking the battery out and leaving it open in a warm place overnight so any moisture that might have gotten in could evaporate

:confused: yeah I tried this and another couple of solutions I found online. I think something is just shorting out in the circuit that drains the battery unfortunately.

If you have a Garmin Dual, just call Garmin and tell them it shit the bed. They discontinued the Dual, and will send you a HRM Pro as a free replacement. They did this for me about a month ago. No questions asked really. I had the new one in three days.

5 Likes

It will definitely be interesting to know how much the HR data is utilised by AIFTP.

I felt great riding today but my hr data says otherwise according to Garmin and TP.

I had a similar issue where i thought my garmin dual hrm died but it actually just lost connection to one of my devices. Try another phone or ipad before throwing it out.

I’m unsure where I read it, but heart rate is not used by the model. A TR employee will need to confirm/deny.

Power is used for zones and the survey is used for RPE. HR is also incredibly individual

I’m guessing the algorithm looks at a combination of things but one is probably amount of time with HR over 90%. I know I’ve done workouts like Kolie Moore style vo2 max where I received the “You seemed to struggle today” prompt. I’ve receive the prompt with and without breaks during the ride…

It’s on the AT Overview page.

Currently, Adaptive Training exclusively uses power data. As the system develops, we are excited to eventually incorporate more data sources for an even more nuanced understanding of stress and fatigue.”

That said, I think I recall seeing a comment from Nate in a forum thread saying that while AT doesn’t rely on heartrate data, TR does use it if it’s available. He offerered no specifics as to how it’s used.

1 Like

I would be very disappointed if TR does not use HR data. Looking at the heart rate during SS or Threshold intervals could be a great way to detect too high/low FTP value. Similarly there’s a good deal to be learned from the way HR creeps up during intervals, rate of HR decline in the rest periods, eveloving relationship wrt your max HR etc. If TR is not doing any of this, it leaves a lot on the table.

4 Likes

TR does use HR data. This is a recent quote from Zackery on another post here

5 Likes

There are two different TR features being discussed here, I think….

  • Adaptive Training, which does not use HR data; and
  • AI FTP, which does use HR data.
2 Likes

I posed a question a while back that I hadn’t gotten an answer to. AI will show an AI FTP after 10 TR workouts have been completed . If all workouts were successfully completed and it’s only going by power, it has the same data whether those workouts were all really easy (high FTP) or really hard (low FTP). How does it know?

Through the workout surveys you complete, and the smooth/erratic power data points I would say.

1 Like