Why is rest between intervals (almost) always at 40% ftp?

I treat it as a plug number for light spinning – keep the legs moving but don’t do any real work. The text often says the precise output is irrelevant, and to get off the bike and stretch if you prefer.

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Those workouts are in all the MV build programs.

40% is enough to keep the blood flowing and avoid trainer power floors or overspinning (or falling over sideways out on the road!), but low enough to recover HR and respiration quickly before the next interval. Doing Z2 in between muscular endurance intervals can be detrimental to completing the prescribed work and the benefit is minimal. You can probably get away with it sometimes on easier workouts, but I wouldn’t make it a habit to dial recovery intervals up to 60%, etc.

They just talked about this in podcast episode 259 too, right about midway through.

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I think it’s just one of those, ‘It is what it is’ things.

You probably could get away with doing anywhere between 30-50% and still recover. But if they put it at 40% everytime, you come to get comfortable with that power output and mentally you find some comfort, which helps you relax. Also, regardless of where you are in Z1, you really are not getting a lot of training benefit there.

Regarding the fact that intervals are too long or too short. That is subjective to the rider. If you have been training a while you can start to reduce the amount of rest inbetween intervals. I believe that some coaches do this during their planning for people who are interested in TT’s. As you progress through the training blocks, you do longer intervals and shorter rests. As amazing as TR is, I’m not sure that they can develop that for an individual since it is very subjective to the rider and where they are in the training cycle. So, if you are feeling good to go, you should skip ahead to the next interval and not spend time in Z1.

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A large percentage of my failed workouts stop during those long rest intervals. It may be because I’m conditioned for riding off road, but in general the recoveries are too long and boring for me. It’s very difficult to stay focused. It’s not that I don’t need a rest interval, but I just don’t need so long between work intervals.

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Someone may correct me if I’m wrong…

But I think if you are on a PC or Mac you can pause the workout and then skip ahead. So if you are 2 min into a 5 min recovery interval and you are losing it then you could skip forward to minute 4 and get back into the work. If you don’t need the recovery to complete the work then that may be a viable option. You will lose a couple TSS but you will get 99% of the benefit compared to just quitting the workout.

Also, sometime the -1 versions will drop some of the time between intervals in order to shorten the overall workout time.

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  • You can scrub in all the apps (Desktop and Mobile):
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40 because 41% is too much.

Honestly, there is only 1 workout I’ve done in the years of TR where I’ve thought this is way too much rest. That workout is Hunter with 15 min recovery intervals. I alway sub a different 2hr SS workout when I see that. But otherwise, I am really thankful for the 2-6 min of easy spin recovery.

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Before using TR, I followed another set of structured training plans where rest intervals were almost always at 75%. I was specifically training for a Gran Fondo / Century with much more steady state effort, compared to a crit that surges a lot (look at any of the TR race analysis videos to see that about 25% of the race is VO2Max or above, 25% coasting or active recovery, and the rest in the middle across all zones).

There is an argument to be made that if you can recover at 75% FTP (or so) then maybe your FTP is too low, but I’ll posit (bro-science with N=1 data points) that it depends on what you’re training for.

I seem better suited for longer, more steady state efforts so I prefer 70-75% for any recovery interval 3 minutes or longer. Much below that and I start to cool off too much and find getting back up for the next interval takes more demand than what it’s worth. Specifically, I like my recovery HR in the 130s (max is probably high 170s or low 180s). 70% puts my HR at 132ish, 75% at 137ish.

For shorter recoveries, especially 20/40s, 30/30s, and 40/20s I set the recovery to 50%.

I use Workout creator to edit all interval workouts to 1) change the warm up to a 15-minute ramp and 2) raise recovery intervals to 70-75% (3-minute or longer recoveries). Take my last two interval workouts, for example (see below). I altered the workout recoveries to 75% but ended up dialing them down to 70% due to increased temp and humidity in the basement. Also, I find that if I can do a bunch of workouts in a row recovering at 75% then it is in fact time for a ramp test.

Anyway, just my two cents.

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“40%” is “%04” spelled backwards.

Just thought I’d share.

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@rkoswald indeed i also feel it would aid more for being able to recover at a higher % of ftp. For me 60% would be ideal. If i ride at a lower % then my rpm goes down to keep having enough muscle tension

I’m currently experiencing this excruciating boredom as well. The rest intervals are still far, FAR too low and it’s 2024. This has clearly been a common complaint, as I’ve seen numerous posts about it, including my own.

This thread is 4 years old. Turn the intensity up if you don’t find it sufficient.

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Since lactate plays no direct role in fatigue, the intensity that reduces circulating (!) levels most rapidly is simply a curiosity.

But in any case, 40% of FTP is far too low. Around 75% would be most effective.

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Doesn’t matter. If you do that workouts outdoors, you just self select.

Just put in standard and recover where you need to.

As for recovery intensity… It is hard to describe how short, and brisk the “recoveries” are for elites. This was for running…. And 20+ years ago but I remember well the pain of 24 x 400 @ goal 5k pace (13-14 min 5k guys) with a 200 “jog” that would last at most 45 seconds if you were lucky. Or “The Michigan” where you essentially “recovered” running 2k on grass @ 1/2 marathon pace.

Now… real recoveries are welcome, but 40% is barely pushing the pedals, which is fine for 30 seconds after a hard interval bit personally prefer recovery to be 50-60% for anything VO2 and under.

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Yeah, below 50% for anything more than 30 seconds is a knee and hamstring killer. I tend to recover very quickly, so not only is the low wattage lame but so are overly long intervals.

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Once every 4 years isn’t a common complaint :slight_smile:

I agree that there could be a feature request put in to increase the intensity of the standard rest intervals, however, in your particular case based on your other thread, this would be a sticking plaster over you having your FTP set far too low meaning threshold workouts feel like endurance workouts for you so you dont need rest intervals at all.

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To quote myself from the other thread.

To be honest, I use WO creator to modify the recoveries, increase the intensity most of the time. It is annoying.

I would like to be able to scale the recoveries in user settings for SST and Threshold, not VO2max as for those its more of the workout design / modality.

Holy cow

F that

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