Negative HR decoupling. Thoughts?

[bbarrera]

@Brennus

We notice that if you just hope on the trainer and start pedalling at some low wattage (let’s say 75W) SMo2 gradually goes up until it reaches a plateau somewhere in the mid 80’s after about 35 minutes.

Yup.

Here is my on forum discussion of the same, without the SMo2 data:

What workout did you do today? (2018/2019)

[image] 60% FTP for 90 minutes, my new aerobic endurance ride to gauge progress over time. Guesstimated I need 30-minutes to warmup and tested that by hitting lap button on bike computer: [image] Yup Then looked at EF and decoupling over final 60 minutes: [image] [image] Over time as FTP goes up I want to see increase in EF. Decoupling nice and flat, and under 1%.

At constant power you can clearly see HR rising up until 30 minute mark. Then during last 60 minutes “work interval” my HR and Power track within 1%.

I always throw out the first 15-30 minutes for any tracking of EF and aerobic decoupling, including these quick weekly “Mesa Aerobic check ins.” For outside rides I’m doing more anaerobic work leaving the city, seem to warm up quicker, and for convenience I simply hit lap button after the 15-20 minutes needed to get out of town.