Sorry I haven’t watched those WKO webinars, so I’m putting on my captain obvious hat and regurgitating what Tim said.
Tracking movement of LT1 using soft estimation:
- “lots of ways to estimate LT1”
- “track power at HR approximation”
- “long term trend, a couple of micro-cycles, of that number improving, I feel reasonably confident that we are moving LT1 to the right”
- “that’s how you use soft data”
Personally, for the last couple years I’ve been tracking trends in power at 140bpm:
- 19-20 season it was 171W average power
- 20-21 season it was 180W
- last 90 days its was 185W
- last 4 weeks its was 188W
- last night it was 198W average / 202W normalized for 130 minutes
Here is a snippet of the chart:
(max fractional utilization for this season was 87.9% woo hoo!)
And season high modeled and field tested ftp of those seasons has been 265-275 ish. My zone2 HR tops out around 142bpm, and 140bpm is what I can consistently target, week in week out, for second half of the 70-130 minute interval on steady state endurance rides.
In WKO there are aerobic reports, one example is the Aerobic Power Report Cycling tracks power at 150bpm, I’ve modified all of my reports that use 150bpm to use 140bpm which is my proxy for LT1. Because for me, 150bpm is the top of tempo around 88-90% FTP.