I just started week 3 of the HM L0 and did my Simultaneous Threshold Testing today. I did a Simultaneous Threshold Test about 3 weeks ago (I was using the maintenance plan).
My Power (which I use for the plan) and HR only went up a bit but my pace improved a lot. I know HR may not change much, but should I be surprised my Power only changed by 2W where as my Pace improved by 23 seconds. Is this normal or have I messed something up.
there are a few reasons that could cause the changes you’ve seen:
1. you are running more efficiently and run faster at the same power output
2. you lost weight and are therefore faster at the same power output
Your LTHR should not change much, but you should be able to run faster at the same HR as your fitness improves.
I would recommend to check your Stryd or whatever running PM you are using, to see if the weight was updated or changed. If you are using an Apple device, Stryd automatically updates the weight by accessing your weight from the Health app.
interesting about the efficiency gain, I had not thought of that. I suppose if you think you are not progressing using power an occasional pace session over a known course might provide some encouragement.
Now to work out how to get Stride to pick up my new zones.