Below is a super great discussion from an absolute top site ** golden cheetah software**

It is an incredible dedicated work from an incredible group of people world wide.

It as well shows the very interesting and fascinating difference between the drive to calculate and predicts mathematical based performance and the physiological ideas and looking on what we see we have and take it from there

**Hello, from Max Muselman from the golden cheetah discussion site**

**i am a little step forward.**

**The estimator maybe based on the model from Monod and Scherer:**

**Time = (W_prime)/(Power-CriticalPower)**** **

**Multiplikation the equation with the Differenz (Power-CriticalPower):**

**Time x (Power-CriticalPower) = W_prime**

**Time x Power = W_prime + CriticalPower x Time**** **

**Work_limit = Work_anaerobic + CriticalPower x Time**** **

**The units: Time in seconds, Power in watts and Work in joule**

**This is a linear function with **

**W_prime is the y-axis (the anaerobic work capacity) in joule**

**Critical Power (CP) is the slope (aerobic capacity) in watt**** **

**A lineare function ist determined with 2 points of the graph, so you need two tests:**

**For example:**

**1. Test: CP5: 5min with 281 watt: 281 x (5 x 60) = a +(5x60) x b**

**2. Test: CP20: 20min with 245 watt: 245 x (20x60) = a + (20x60) x b**** **

**so the result of the linear system of equations:**

**a = 14400 J = 14,4 kJ= W_prime**

**b = 233 W = CP**

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**The result of the CP and W_prime Estimator in GC provide the same values:**

**CP: 233 W**

**W_prime: 14 kJ**

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**As far as i understand the model based on the following assumption:**

**- the anaerob capacity is constant and will be full exhausted by each test**

**- the efficiency factor of the muscle is constant during the duration of the complete test.**

**- the aerobic capacity is full usable already at the beginning of the tests.**

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**Some publications criticize that:**

**- the efficiency factor is variable, depends of the work intensity. The muscle fibre types IIb has a three times higher ATP-consumption.**

**- the aerobic capacity has a delay, what you can see on the O2-deficit.**

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**Now i am looking for some information, which value of the measured power are used in the equation. The average or xPower or Normalized Power (NP).**

**If it is the xPower or NP i am very interested of the algorithm of this values.**

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**Kind regards**

Max

You can see the 2 red sections , where the discussion is fun to have.

The anaerobic idea and the group we often use

Richardson et all and there is never an anaerobic state.

Than the section we see in many theories as well in golden cheetah where we deplete the " anaerobic " high energy phosphates like Cr.P and ATP, where other groups around Conett with great new technology question the depletion of atp

Than some statements who move towards the idea that w' Bal is NOT the anaerobic feedback we thought it could be.

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**- the anaerob capacity is constant and will be full exhausted by each test**

** the aerobic capacity has a delay, what you can see on the O2-deficit.**

And above as you can see O2 deficit which still lingers around may be replaced now by EPOC and was developed due to the lack of direct live feedback from the equipment we used.

This creates a fascinating dilemma as we move ahead. What do we do , when technology and newer Methods show some problem with the classical believes. ?

Do we simply force the new findings into the "old ' Ideas to defend desperately where we build over so many years a great concept , or shall we try to open up the possibilities that we can or may have to rethink certain concepts and ideas.

Are we ready to do this or is our own EGO so settled in, that in now way we entertain the option to rethink and perhaps use some new directions?

So this is what so often goes through my mind.

ZONING.

can we use physiological ideas to decide the intensity we try to achieve rather than force a performance upon us to hope to stimulate the physiological target we try to improve.?

I will show some real live feedback's we do daily by guiding the stimulation over physiological feedback's without any performance feedback.

IF we like to look at this options, than we may have to look much closer to the physiological responses we actually can see or have.

In a first step really is the critical look on past ideas like LT2 and LT1 and understand the dynamic of lactate and the accuracy and timing problem we have with any blood testing. So I will try again to show in another write up the dilemma.

I try here again

IF the MAXlass is what most of us would agree is the highest intensity, where the production of lactate, who ever and where ever it takes place, is in balance with the recycling or utilization of lactate than :

a) what happens when we take lactate below MAX LASS in a lower intensity than the optimal balanced intensity and we take it very 1 min for 10 min.

What do we see ?

b) what happens if we go an intensity just above MAXLASS intensity when we take lactate every min for 10 min ?

c) What happens when we go at MAX lass intensity over 60 min and more when we than take every 10 min from the resting lactate on a lactate sample..

Is lactate a great energy source ?

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