I see your messages and actually am in your TrainingPeaks right now! But might be till the morning tillI get a quality response to you. I need to get my kids to bed here shortly!
Glad you recovered well and were able to get in todays workout. When you get deep into these training blocks its coming to have days that feel harder than others. And of course the diabolical workouts are really tough! Only made tougher by putting a second workout behind it. Ouch!! Long day in the saddle there.
You should absolutely retest next week. However with being a subscription member I may rework your plan for you based on what you are doing over the course of the next two weeks. Is the Fondo you are doing the Assault on Mt Mitchell on the 18th? If so you will not be doing any test most likely between now and then but focusing on recovering and tapering. I can’t imagine it happening, but also don’t see anything about it being canceled. I actually did that last year for the first time and finished 2nd. Super fun! Just remember to properly fuel the entire day and save some for the last 25 miles which are literally all uphill. Like at least 4 - 6% most of the way. Just two sections of brief respite. I could go on and on about this but lets leave it there for now.
So here is your performance manager chart. It is a way we track your fitness. The blue line is your Chronic Training Load (CTL - fitness). It measures how much workload (TSS) you have done. It basically is an average of TSS over the last 31 days. So you want to see this steadily increase through the base period as you build fitness. And you have done exactly that! Just a perfect build all year from January.
The yellow line is your Training Stress Balance (TSB - fatigue), well TrainingPeaks calls it Form. Basically it takes how much work you have done over the last 31 day and subtracts the amount of work in the last 7 days (Acute Training Load - ATL). You have been training harder the last couple of weeks than you have over the last several weeks, typical as you are trying to build fitness. But ideally we want this to come up to +5 - +15 before a key event. This is why we taper and rest. Now you around - 20. So next week would be about brining the workload down. But you still need some intensity to stay sharp and keep from going flat. Similar to a regeneration week.
As far as your FTP is concerned you haven’t had any really big 20 minute effort. However you highest 20 minute effort was on Tuesday. On your 8 minute efforts you were averaging close to 300 watts and 110% of your FTP. Even if you kept this up for 1 effort or relatively close it would show an increase in your FTP. This was during an effort that you were at your FTP and then riding well over. With riding an effort a bit more consistent and only once you maybe able to hold close to that for 20 minutes.