Help! I'm stuck

So… I’m almost 4 weeks into SSB HV1.

First graph: daily workout sessions along with my morning RHR → details in data set below, as well as by week
Second: Fitness/Fatigue/Form chart from intervals.icu

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I have swapped out a few scheduled rides by some outdoor rides (road and MTB) - green bars.
Last Saturday, I have replaced a 2h SS session by a 3h Endurance session (Big Mountain).
I am also doing functional and core strength work 3x/week and daily 15 minute yoga sessions for mobility and stretching.

Some thoughts/questions/notes:

  • I think I’ve been overdoing it a bit by adding those outdoor rides as these have added quite a bit of TSS. Last week I even hit a TSS of 945! I’m worried I may be digging a hole here for me, however…
  • despite overshooting my target TSS, my RHR is only slowly creeping up, which is expected given the gradual increase of volume. I don’t see signs of overtraining (yet).
  • decoupling for all my rides has been minimal - mostly between -1% and +1%, even my outdoor rides and the 3h endurance ride.
  • as sessions build up throughout the week, my RPE for the same target power increases, as well as my HR/pwr ratio, until I hit a rest/recovery day, after which this drops again.
  • I have noticed on my outdoor rides, that my RPE has gone up compared to before starting SSB HV
  • I definitely feel pretty flat at the moment, ie most power above FTP seems to be gone (this became quite clear during my last MTB ride).

This weekend, I may do 1 or 2 more rides, which will overshoot my target TSS once again, before having a deload/recovery week next week. I’m very curious to see where my FTP will be following this recovery week…

Anyway, I just wanted to share where I am at at the moment. I welcome any advice, suggestions, feedback, comments. Thanks!