Like 5 to 10 minutes which is really convenient from time-management pov haha. Yeah so I record heart rate on a garmin venu watch and then the bike-tacx setup sends other stuff like cardence to zwift so I record the thing twice to see all the metrics but stuff like distance is off between the two (like 3km on garmin but 3.5 km on zwift). Anyway so besides the minor irritation of recording stuff twice, I’m doubting the accuracy of this little watch and might just buy a heart strap instead, though it seems like pretty extreme kit for a beginner.
But even with gym aerobics classes when I was younger/leaner I always found long durations strenuous so maybe I just have a like small heart or something (or I’ve just never been fit).
I looked up an old school friend of mine who’s like an olympics level pro cyclist and I see that on race days her heart rate and cadence is similar to what I’m going at (though obvs 4x power and like for an hour) but then that’s her doing competitive racing and not just goofing along to look better in a swimsuit - so I don’t think I’m going to keel over but maybe I should go for a slower cadence and stiffer gear or something instead. And yeah - check HR by comparing it to something reliable.
Thanks 