During the 20 minute section of 4dp I registered the same ftp as last 4dp, but 2 or 3 minutes in I noticed my HR well above what I can typically hang on to. Expected a spectacular crash, but hung on to that HR until the end, but again, ftp was unchanged from last 4dp at about 5 or 6 bpm lower.
Additional info: MAP is up a few watts, and my max HR for that section was 10 bpm higher than I’ve recorded in well over a year.
More info: week 11 of the 12 week advanced +strength general road plan was largely recovery while week 12 was the standard 4dp prep week, so the legs were really fresh.
Lastly, I may not have been 100% healthy as there was a slight amount of nasal congestion at the time, but nothing in the chest, no fever, aches, cough, or anything that would otherwise indicate that a 4dp would be a bad idea.
Anyway, I’m just curious what might have happened to get an increase in LTHR with no increase in FTP.