I go another very nice email and with permission of the person ( Thanks so much ) I will try to give some answers or at least thoughts to a part in the discussion we use with MOXY assessments .
Here a small section of a great mail .
As such your answer makes a lot of sense but I cannot follow all the terminology.
I don't yet know what the terms, compensator, limiter, ... mean.
Compensator and LIMITER are two interesting ideas we run in our assessment.
So I like to try here to give you some ideas on what we mean with this and MOXY usage.
First I like to give you some random example how the body work in many cases with this idea of Limiter and compensator. I like to strat first with some sport examples and than add randomly some more medical or physiological examples. I am sure after this many can see the ideas or thoughts behind the limiter and compensator but than I will end the ideas with a specific example on MOXY use.
You have 2 people.
A is a very good cyclist and in top cycling shape.
B his friend is not into to much performance sport but is cross-country skiing very regular since many years and was once very good in this ( technically and physiologically. Now he lost his physiological advances but still is very smooth on his skis.
So one day they go skiing together.
A is very surprised how hard he has to go and how fatigued he was , when B was steady talking from the front and enjoyed a good but relaxed day on the cross country skis.
They skied together but with very different limiters and compensators.
A had technique as his limiter , but was able to compensate with a very good fitness level.
B had fitness as his limiter but had a great technique as his compensator.
Now what would be the best situation to have the best athlete here ??? So where would you focus on the training idea in A or in B.
Assuming they may have done a race and both would have arrived together and we have the race time 34 min.
What would we know after the 34 min on what to do with this A and B client when we only look at the time ???
So you have 2 athletes same VO2 max ????
You have two athletes same LT performance ????
You have two cyclist with the same FTP 20 ????
You have one athlete with 5 times the same 350 watt load over a 1 min interval ???? You see where I go with this ????
Okay I planned to give some other examples short. You have knee pain on your right leg and you keep cycling. FTP 250 .with 2 good legs.
Now what is the limiter and what may be able to compensate ?
You have a chronic lung problem and your right section of the heart has to push more and more into the lungs circulation. Limiter lungs , compensator right ventricle . This is okay for a while but sooner than later your limiter creates an overload on the compensator and the right ventricle will be soon a new limiter.
Now to the physiological assessments and or tests.
Remember A and B and the race.
No idea what to do , when you see the race result. Any thing you can do is take the time , a calculator and make a % zoning out of this race time ???
I that smart ???.
So any VO2 max test is not far from this idea it just looks more sophisticated and it costs somewhat more. You get a VO2 max number a VO2 max performance and than you go to the calculator . That's it.
At least you have somewhat an individual max tested level.
Now you go and make a lactate test. What you get5 here is a series of points and 25 options to fit into your ideas on where you may find a LT . Than you not even use the values really but find a performance or HR number at the speculated LT which as you can see can have 25 different results and even if you use one idea only you will have many different results depending on your step length, food / nutritional situation and so on.
Now as a cellist you may take FTP 60 or 20 and again you have a " race result" and you hope that this objective performance number form today will carry on for many days if not even weeks to come.
You actually have to hope that you do not make progress as otherwise you will push too low elvels to create more progress.
Now in any of this cases, no matter whether we believe they work we miss a physiological relevant information. Meaning we do no know what may have cause this performance today as we do not know what may be today limiter or compensator. Another example.
You go to altitude and your FTP power may be lower.
True it could be the respiration as this may be you limiter already on sea level. so the ability to get rid of CO2 will change the way you will use O2.
BUT perhaps you have delivery limitation as you may have not enough transportation capacity like red blood cells. This may be perhaps the reason to go to altitude.
Nevertheless you now create again more H + than on sea level and you can try to compensate the get rid of CO2 over a really good trained respiratory system , which now is the compensator . Now many more options. But you can see , that in some cases altitude stimulation will improver your sea level limiter like for example O2 transportation. He will benefit nicely.
On the other side a guy who has a delivery limitation respectively a respiratory limitation may have a negative impact from altitude as he now can move more O2 but if he does not has the mitochondria density he will now push with much more O2 in nIRS will still produce a lot of CO2 and his limiter which was overloaded in the first part in the 3 weeks altitude is still a limiter and performance will be not great. That is why we have responders and no responders in any training idea. As long we do NOT know limiter and compensator we just say you are a non responder and he is a responder.
Sorry that is it. In fact we may have a coaching team which is a nonresponsive coaching team as they where not able with their test idea to find limiter and compensator and based on this info would have adjusted the program accordingly instead having one menu to eat for all.
Now the last section as an explanation first a picture following with some wording but try to give your own words to the picture
Classical assessments will be represented on the left side with Black rowers. A VO2 max test a FTP test a LT test a max HR test all are black rowers. They all keep us in the dark as we simply end up with an end result and have no feedback on how the team which is in us actually created this end result. Who had to compensate for what limitation and so on.
So we know that we have different players in a team and to have the best result we need a very balanced team. If we have one weak player than the team has an overall performance limitation as the good player needs energy to compensate for the weakest link or player.
So with NIRS we can get very close to finding the limiter and the compensator.
Your respiration is a limiter.
So in a MOXY assessment you will see that you start to deoxygenate more than before and you may as well see that tHb overreacts in the one minute break where as SmO2 will increase in a delayed fashion.
The respiratory limitation created a situation, where to stay in a balanced situation with CO2 you should be able to breath 190 l/ VE but you can only breath 145 L /VE so you start to accumulate CO2 in the body. You may try to compensate with the limiter r( respiration ) by breathing much faster, but as it is a limitation you may breath shallower so it does not work you only shift the way you try to breathe but still only 145 L. The CO2 increase will shift the O2 disscurve to the right. Great as you now can get easier O2 ( SMO2 drops ), but you have more problem to load O2 from the lungs to the Blood
So great compensation on one side but a time bomb on the other side.
So the high CO2 allows a nice drop in SmO2.
but a systemic delay in reloading O2 as long as we are CO2 wise out of balance.
The high CO2 will as well create a vasodilatation so we see this on the tHb trend.
BUT we only see that when we get rid of the main O2 user , that working muscle. So that's why we have 5/1/6 idea or we stop once in a while during a workout to get a feedback how is now limiter and who may try to compensate.
Will follow up with more directions but first try to digest these individual menus and please come back where ever you see some questions in this ideas.