Need help with HR-based workouts (in bpm)

I’m working with a new athlete for whom only the endurance effort range is currently established, and only in absolute bpm. HR zones and LTHR are not yet properly configured, neither in Intervals nor on the Garmin.

Given that I’d like to build a workout that helps him stay, for example, between 130 and 140 bpm, what would be the best way to do this?

I could use % of LTHR based on default HR settings, but I’m concerned that these values might be interpreted incorrectly by the Garmin, resulting in a completely different bpm range. Or more clearly, I don’t know how the HR is communicated by Intervals and interpreted by Garmin. I fear the same “FTP must be the same” factor from .zwo files.

For various reasons, configuring HR zones and LTHR is not feasible at the moment. Any guidance would be appreciated!

Thanks

If he is doing workouts on a trainer with ERG mode, you could sign him up to TrainerDay and use the HR+ mode.

Set the HR target to 135 and it will look after the power to keep HR close to the target.

The smoother he keeps things and presuming he has decent cooling, +/-5 bpm should be no problem for the system to manage.

Unfortunately, the workouts will be outdoors (well… fortunately, actually :grin:).
Anyway, thanks for the suggestion. TrainerDay really does offer some very interesting features!

Configure the HR zones anyhow but use the same numbers / zones in both platforms. This way the % being communicated is the same for both sites.

PS: BreakAway also supports HR based workouts and not only for steady state.

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The TD HR+ is not only for steady state either.

I was suggesting things that a new rider could aim to do that would be most likely to keep his HR within +/-5 bpm in a low HR zone.

As you will have experienced in your own testing and use, it doesn’t take much to move HR in low HR zones: drinking / eating, up and down out of the saddle, sitting up off the bars, poor cooling etc. All of these things can move HR.

In a new (i.e. untrained) athlete, such little changes can easily cause +5 bpm