There are a couple of sites, programs, out there that model your Vo2max and VLaMax based on a couple max efforts. Like Inscyd, Sentiero and Aerotune.
Is it possible to add something similar to Intervals? There is an open source script on Kaggle here: Anaerobic Threshold via VO2max and vLamax v2 | Kaggle
I’m no programmer or anything, so don’t know anything about implementing like that.
But would be interesting if this could be added next to e.g. eFTP.
Intervals will already provide an estimate of your vo2max for you. Have a look on your /power page under best efforts for an estimate.
I would also be interested in a VLaMax estimation but like Vo2max and any algorithm based estimate it should come with the usual caveats.
I had seen this code, which is actually what Inscyd uses, with different papers by Mader et al. There is just a variant concerning the VO2max calculation but I don’t have a source on that.
Currently I’m looking for their method concerning their estimation with the 4-5 lactate samples… if you have any info, I’m interested!
I wonder why the 1968 paper is still not available to download 
I no longer have my university journal subscription
The missing piece to DIY lactate modeling like Inscyd is the power-only VLaMax estimate. I cannot find an equation for that anywhere, however I bet I have it in some paper on my computer, I just don’t recognize it.
WKO’s metric they call VLaMax is not consistent with Mader and Heck’s protocol, so it’s not applicable for estimating mlss.
It’s difficult to even measure VLaMax with power and lactate sampling. You really need sub-1hz power sampling to get a good curve to estimate the 3.5% drop in power which is assume to be time to end of alactic power generation and the beginning of lactate creation. Don’t quote me on this. I don’t know ex phys.
If you code the 2003 Mader paper equations and have metabolic data, you can simulate an entire workout or event and estimate lactate concentration after some workload. Or plan intervals to keep lactate in a certain range. There’s some nice modeling you can do.
On the other hand, VLaMax measurement seems to be extremely imprecise. And WKO even has a whole article about how they don’t trust the VO2max+VLaMax model of lactate threshold. This model is for a cell, not for a body.
But I’d love to play with this. The whole idea of degeneracy between aerobic and anaerobic systems in determining the threshold output is very rich
WKO has their own motivations for describing what they think is VLaMax.
I trust Mader and Heck over Kolie and Tim at WKO.
VLaMax measurement IS extremely imprecise. SRAM is about the only power meter maker who does sub-1hz measurement. I’ll spend the money on a measuring device. But there just aren’t many available.
I’ve measure my VLaMax about a dozen times. I’ve measured my maximum blood lactate concentration several times. I like measuring things. Humans do not have the tools available yet at the price point for everyone to do at-home testing. Soon.
I’m trying to find test subjects in my area. I’d love to test about 40-50 athletes and make a model for VLaMax.
*extremely oversimplified opinion
You probably have read Hauser’s paper (Comparison of calculated and experimental power in maximal lactate-steady state during cycling - PMC). You can find how to do it there…
At least that is how I do it for myself. And it works well enough to help me on my training.
Oh yeah, I like Hauser’s paper. They break the 1986 Mader work down nicely.
Back calculating VLaMax from the rest of the model is ok if the other parameters are known, but estimating VLaMax off of both VO2Max and mlss estimates is too messy for me. At that point, just use CP testing and be done with it.
There is a way to estimate VLaMax based off power-only data from a sprint effort…Pmax and the shape of the sprint curve/slope of power deterioration. That’s what I’m after.
Hello,
Did you manage to find what you were looking for?
Personally, I’ve read a lot of papers but I still can’t find an accurate estimate of Vlamax with only sprint power output data…
If you have any new information, I’m really interested!
