stockae92

For example in something like 2 x 20 min @ FTP training. When your legs gets so tired during the first 20 min block that you basically know you will not be able to complete the next 20 min block, do you lower the intensity of the first block in order to complete both 20 min blocks? Or keep the first block at 100% and hang on to the next block as much as you can and bail when you can't turn the crank any more?

Heathpack 

I’d say resist the temptation to predict what’s going to happen in an interval. Sometimes I find myself getting stronger the longer I go. My impression is that some days I get better at clearing lactate over time.

So, my approach would be to complete the first one at as close to my power target as possible. Then try again with the second interval and see how that goes. I wouldnt necessarily bail during interval 2, if I could manage a 95ish% effort, I’d just keep going. If I was enjoying my ride but missing my target, I’d probably keep going and focus on steady power, good form, more time in position on the bike, maybe high cadence.

If I had a tough workout the following day, I’d be a little more likely to bail, to save my legs for that.

I guess “it depends,” but I’d be more likely to give it a try before giving up.

redlude97

remember that zones are not actual physiological steps, and the adaptions you are training occur at all zones to some extent. So hitting an exact power number is not necessary to get the majority of the benefit. So I'd say its better to finish the 2 intervals at whatever the max amount of power you can complete them at.

Drew Eckhardt 

No, because you need to exceed some threshold for training benefit and below that you're just making yourself tired.

If you believe that level is 100% of FTP, are aiming for 4x10 at 110%, and are falling below FTP on the last interval you've run out of muscle glycogen, are no longer stressing your glycolytic energy system, and should stop.

Yes, because that's the only way you'll find out whether you can't continue or it only feels that way.

Seattle Forrest

If I can't hit (or come near) my targets, I go home. Also, if I'm on fire and doing much better than I should be, I go home. But I just turned 40 and I'm having to pay more attention to recovery.

rubiksoval

I just bail. If I can't hit the numbers, I wait for another day.

redlude97

FTP has no physiological relevance. It is not an aerobic/anaerobic equilibrium or lactate clearance balance point. This idea that FTP is some kind of physiological threshold needs to die. Otherwise sweet spot training wouldn't increase FTP. You would get most of the gains if you did 4x10 at 110/110/110/90 as you would if you could finish all of them at 110, and certainly more of the gains than if you only did 3x10@110.

redlude97

https://www.trainingpeaks.com/blog/p...aining-levels/