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Juerg Feldmann

Fortiori Design LLC
Posts: 1,530
Boulder  17/18 of January 2014.
 This will be a first  "official"  gathering  for MOXY  users in Boulder.  It is NOT  an education session.
 Most know why:
 Education is the ability to repeat  what the teacher tells you  to repeat  so you pass the exam.
 This is much more  a gathering  for critical people interesting to get a first hand  view  on what we did  with NIRS  ?MOXY over the last  couple of  years in the way of  practical applications. It is a   "test"  fro us  to see, what people look for  or    expect from MOXY  as well as  testing our self  on where we  have to  work harder  and more specific in the future.
  It will be a hand on  2  days  with critical discussions  on what we  did  still do  and may be able to change.. Here  the  first  day  of  the Pre  camp;  A kind of a warm up.  Question: How do we  control in sport  the optimal time  and  duration of a  " warm up " idea.. On what do we  base  it. ?

Juerg Feldmann

Fortiori Design LLC
Posts: 1,530
Now the same way you may prepare  for " Christmas"  we prepare  for our seminar.
 We   shop and have fun  just to see, that we  may have bought too much or the wrong ideas ???.
So  after  2 days of  getting  some  more   details into place  we  go back  for pre seminar fun  an thoughts.

Juerg Feldmann

Fortiori Design LLC
Posts: 1,530

 This is a reply  to some ongoing discussion in our preparation for  our Boulder  group gathering.

Here our next " challenge"
I am sure all of you are aware of some of the Key notes I have put randomly together for our discussions.
The Goal here is to try to get the message through, that we know very little ( to avoid the word nothing ) and that we hope to trigger a lively discussion, when we introduce you to some of our ideas on how MOXY could or can enhance practical applications in the coaching and training community.

You will see, that we will have some fun discussions, when we look at ideas like this :


I'd like to learn more about how the Moxy might be used within cycling training programs to regulate intervals. For example what SmO2 levels have you found that are associated with threshold and Velocity at VO2max? Also how can the device possibly help decide the length of a recovery interval?

I would ask : rather the opposite direction.
Are oxygenation levels ( SmO2) creating some indications of metabolic changes.
Same as:
We say; VO2 "max" ( let's get used to VO2 peak values for a specific test ) predicts a certain performance.!!!
How about a certain physical performance or activity may "predict" a certain VO2 peak ???

Or a certain SmO2 level will predict a certain performance !!!
or perhaps better a certain performance activity creates a certain SmO2 level. ????

So here our next reading followed by a word document.
The well know PDF on VO2 discussion  Shown  on here  already   from T. Noakes discussion.

Juerg Feldmann

Fortiori Design LLC
Posts: 1,530
Boulder    info    as an inside view.   One of the great news  is, that Frank Bour  form Physio flow  will be there.   It is  a team  of Frank  and his Dad  Jean Bour, who developed  the first portable    standalone  cardiac hemodynamic   assessment tool the Physio flow  and it is one  of the  main reason  why we    have so much feedback on  MOXY info  because we  combined  cardiac info  and  respiratory info  and MOXY  to see the full team   of a human physiology live  at work. Here  some picture  for the past , when Frank was   in Quesnel  with some other great brains.
Frank running  during an assessment
Screen live shot  CO HR  and SV
Frank running  his software on the computer.  Myself  as usual creating a mess  to try to mount something on  our poor  guinea pig  and Dr. Ventner  from South Africa    keeping a clear head
Physio flow  super small Physio flow  VO2  and  NIRS on a wheel chair  athlete Th4

Attached Images
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Juerg Feldmann

Fortiori Design LLC
Posts: 1,530
A few more days, till we  will have a great group of very different back grounds together in boulder  discussion and learning from each other.
  Over the last few  days we  had many  information's  concerning many open questions we have in today's  field of testing and exercise physiology.
 With new  research on the   lactate front  and the dramatically change form an ugly   by product  to a great  survival helper, with the fact that VO2  max  in many cases  is replaced  now with a VO2 tested  sport specific peak value. With the  information, that  when using performance alone we  may miss some important  messages  the  body  my try to give us.
We  are left  with "  hmmm now what.
  What is the point of a lactate tolerance  workout, when in fact we  only can do that workout thanks to  lactate production.
 What is the point of " cooling " down  or active  movement  in between sets, when we  only get rid  of  energy we  may be able to use in the next load.
And   and and.
 So  the  integration of the latest  information we have  is far ahead of practical applications we sue  as coaches.  Therefore it may be time to review our won ideas and workouts  and try to get a handle on why some workouts   improve  some athletes  and the exact same workout   reduces performance in another athlete.
 This is what  an assessment is all about.
 We do not test to see how good you may be, we assess to see, what our training idea may of may not have changed in your physiological team work.
  So here a  small inside vie  in a big part on what we will do  and discuss in Boulder.
 This here is just the endurance section, but in one way as well an "interval" information.  why.

Juerg Feldmann

Fortiori Design LLC
Posts: 1,530
A few  days to go   on our group in Boulder  here  what the "homework" is all about.

After some practical examples yesterday back to some ideas.

Ideas we offered for discussions many years back and now we see slowly support and confirmations on what we where looking in practical terms of Demspey's metaborelfex.


Here a very nice small study on respiration and NIRS and possible metaboreflex information. The second study is a study which is close to what I sent you with vastus medialis and lateralis as a practical example. Here it is nice to read.

So you will see, that we will have a great small group so we can really talk and discuss and not just listen and swallow. I am so looking forward sharing some good and some less optimal ideas with all of you .

Cheers Juerg
My goal. how can we integrate MOXY in our daily activity schedule to improve individual physiological guided exercise pprograms.



Related trends in locomotor and respiratory muscle oxygenation during exercise.


Legrand R, Marles A, Prieur F, Lazzari S, Blondel N, Mucci P.




Laboratory of Human Movement Studies, Faculty of Sports Sciences and Physical Education, Lille University, Lille, France.






We investigated the potential effect of respiratory muscle work on leg muscle oxygenation without artificial intervention in non-endurance-trained young subjects and searched for the range of intensity when this effect could occur.




We simultaneously monitored accessory respiratory and leg muscle oxygenation patterns with near-infrared spectroscopy (NIRS) in 15 healthy young men performing maximal incremental exercise on a cycle ergometer. Pulmonary gas exchange was measured. The respiratory compensation point (RCP) was determined. Oxygenation (RMO2) and blood volume (RMBV) of the serratus anterior (accessory respiratory muscle) and of the vastus lateralis (LegO2 and LegBV) were monitored with NIRS. The breakdown point of accessory respiratory muscle oxygenation (BPRMO2) and the accelerated (BP1LegO2) and attenuated fall (BP2LegO2) in leg muscle oxygenation were detected.




BPRMO2 occurred at approximately 85% .VO2max and was related to RCP (r = 0.88, P < 0.001). BP2LegO2 appeared at approximately 83% .VO2max and was related to RCP (r = 0.57, P < 0.05) and with BPRMO2 (r = 0.64, P = 0.01). From BP2LegO2 to maximal exercise, LegBV was significantly reduced (P < 0.05).




In active subjects exercising at heavy exercise intensities, we observed that the appearance of the accelerated drop in accessory respiratory muscle oxygenation-associated with high ventilatory level-was related with the attenuated fall in leg muscle oxygenation detected with near-infrared spectroscopy. This suggests that the high oxygen requirement of respiratory muscle leads to limited oxygen use by locomotor muscles as demonstrated in endurance-trained subjects. The phenomenon observed was associated with reduced leg blood volume, supporting the occurrence of leg vasoconstriction. These events appeared not only at maximal exercise but onward above the respiratory compensation point.






[PubMed - indexed for MEDLINE]



The relationship between muscle deoxygenation and activation in different muscles of the quadriceps during cycle ramp exercise


Lisa M. K. Chin,1,2 John M. Kowalchuk,3 Thomas J. Barstow,4 Narihiko Kondo,5 Tatsuro Amano,5 Tomoyuki Shiojiri,6 and Shunsaku Koga1


1Applied Physiology Laboratory, Kobe Design University, Kobe, Japan;


2Rehabilitation Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland;


3School of Kinesiology and Department of Physiology and Pharmacology, The University of Western Ontario, London, Ontario, Canada;


4Department of Kinesiology, Kansas State University, Manhattan, Kansas;


5Faculty of Human Development, University of Kobe, Kobe, Japan; and


6Laboratory of Exercise and Sports Science, Yokohama City University, Yokohama, Japan


Corresponding author.


Address for reprint requests and other correspondence: S. Koga, Applied Physiology Laboratory, Kobe Design Univ., 8-1-1 Gakuennishi-machi, Nishi-ku, Kobe 651-2196, Japan (e-mail: ).


Author information ►Article notes ►Copyright and License information►


Received October 15, 2010; Accepted July 25, 2011.


Copyright notice


This article has been cited by other articles in PMC.


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The relationship between muscle deoxygenation and activation was examined in three different muscles of the quadriceps during cycling ramp exercise. Seven young male adults (24 ± 3 yr; mean ± SD) pedaled at 60 rpm to exhaustion, with a work rate (WR) increase of 20 W/min. Pulmonary oxygen uptake was measured breath-by-breath, while muscle deoxygenation (HHb) and activity were measured by time-resolved near-infrared spectroscopy (NIRS) and surface electromyography (EMG), respectively, at the vastus lateralis (VL), rectus femoris (RF), andvastus medialis (VM). Muscle deoxygenation was corrected for adipose tissue thickness and normalized to the amplitude of the HHb response, while EMGsignals were integrated (iEMG) and normalized to the maximum iEMG determined from maximal voluntary contractions. Muscle deoxygenation and activation were then plotted as a percentage of maximal work rate (%WRmax). The HHbresponse for all three muscle groups was fitted by a sigmoid function, which was determined as the best fitting model. The c/d parameter for the sigmoid fit (representing the %WRmax at 50% of the total amplitude of the HHb response) was similar between VL (47 ± 12% WRmax) and VM(43 ± 11% WRmax), yet greater (P < 0.05) for RF (65 ± 13%WRmax), demonstrating a “right shift” of the HHb response compared with VL and VM. The iEMG also showed that muscle activation of the RF muscle was lower (P < 0.05) compared with VL and VM throughout the majority of the ramp exercise, which may explain the different HHb response in RF. Therefore, these data suggest that the sigmoid function can be used to model the HHb response in different muscles of the quadriceps; however, simultaneous measures of muscle activation are also needed for the HHb response to be properly interpreted during cycle ramp exercise.


Keywords:incremental exercise, near-infrared spectroscopy, surface electromyography





Juerg Feldmann

Fortiori Design LLC
Posts: 1,530
Here a  short inside  view  for  groups   planning a small group seminar  to learn more about practical  use of MOXY and its integration into  some  ideas of physiological assessments.  I am looking forward to Boulder   to learn  from all the great people  opening the way  to a  interesting  new direction  with   some clear and some less clear  information's  but all to try to make progress.

Attached Files
pdf Moxy_Seminar_Attendee_Bios.pdf (133.22 KB, 33 views)

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