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Juerg Feldmann

Fortiori Design LLC
Posts: 1,530
I got a very nice and interesting mail from a  great name. As so often  many of the responders sent my private  a mail and do not like to have their name used on a public forum.
We absolutely will accept this  situation, and I always mail back asking for permission to use the topic as a yes or no.
So here I got a friendly yes.
 In short :
 The question or better the discussion was :
Why do no more  or  big name people in practical sport science use this fascinating topic  of integrating  new technology  to the " classical" ideas of testing.
In short  we agreed very easy and fast :
 Tradition and business are the  fundamental breaking blocks in this cases.
But I have a much better and more  in depth answer, presented last year in London  during the annual meeting of the physiological society.


How science, medicine and engineering has changed how athletes train and perform

S. Drawer and C. Cook

UK Sport, London, UK

Arguably sport science is in its infancy, with the first robust publications truly directed at the subject appearing many years after physiological

and medical related treatises relevant to similar subject areas. While understanding in biomedical sciences has progressed

almost exponentially since the advent of modern biology of the Watson and Crick era, the same can’t really be said for sport science at its

application edge. Often sport science appears undertaken with little reference to more progressive and better work in fundamental fields

of biomedical endeavor.

This does not necessarily need to be the case. Much work of high caliber in biomedicine and engineering can be piggy-backed on to do

innovative work at the applied end of sport science. While innovation is not always viewed as novel or pure in the academic sport science

perspective it can both escalate and accelerate applied adoption of good fundamental concepts and indeed correct poorly used and

extrapolated ones. A good example of the latter is the understanding (and application) of the hormone testosterone. The clear results in

muscle hypertrophy from supraphysiological abuse led to the sport science concept that small changes in natural levels would be equally

important, probably an erroneous notion of what testosterone does. Excellent work at the biomedical level has challenged this and as a

consequence in turn driven elite athlete applied work demonstrating other important sporting applicable roles of natural testosterone

more in keeping also with a biological evolutionary perspective. Similarly an examination of a wealth of biomedical data compared to

new descriptive data collected in elite athletes suggest that elites function quite differently to the often used student population sport

science study.

Rapid progress in engineering and technology has also driven sporting applications that have undoubtedly assisted in the color of medals

obtained –while it has become a sporting cliche –entimeters, hundreds of seconds and minimal percentages that appear marginal do increment

to a measurable gain. Knowledge on athletic performance is rapidly evolving through the miniaturization of electronics, growth

in processing power and automation methods which are now common place in the field. Such technological advances permit the rapid

testing and application of fundamental biomedical ideas in an ecologically valid environment in which the athlete and coach practice and

thrive. These advances provide a platform for greater adherence and commitment from athlete and coach to a systematic process of

investigation in pursuit of performance development. Although much work still remains, technology is beginning to provide the capability

that allows an integrated systems approach to understanding how individuals respond to the stressors of training and competition in a

continuous and longitudinal manner.

Our talk will discuss some of these examples in detail and argue that harvesting fundamental work in bio-medicine and engineering can

promote high caliber applied sport science research that is both more scientifically robust and more quickly adoptable to sporting gains.

These two make extremely good partners and have, and can further, push elite athlete practice forward.

Where applicable, the authors confirm that the experiments described here conform with The Physiological Society ethical requirements

Juerg Feldmann

Fortiori Design LLC
Posts: 1,530
Here another mail I got, very friendly but some in between line ideas to listen to.:
 My interpretation>
 Great ideas with NIRS but it sounds a little bit  too adventures to believe we can use  information's like that to  replace VO2 max and lactate ideas.

  Short answer :
  1. We do not like to replace the  traditional ideas.  We like to enhance the traditional ideas by adding this new dimension of information. Once you use it  , it is up to every single  coach to decide, what he can use more realistic and whether it is  worthwhile to draw blood for lactate  and or use any other idea with it and how to apply the information to gather in  a lab on the street  for your client. ( BIO feedback )
  BUT  second.
 Yes we work on this idea since many years, yes many people where smiling    as so often but today 
 Are we still alone .
 Here a nice summary  of some of what we do since a while from more accepted people.

Not  alone at all :

We may have started early to use the idea many years back but it is increasingly accepted  even in the traditional world of Education


The information collected by the NIRS device in this study are standard NIRS measurements of oxyhemoglobin (O2Hb) and deoxyhemoglobin (HHb). From these measurements three other variables can be calculated. Firstly, through the equation [O2Hb - HHb] hemoglobin difference (Hb Diff.) can be calculated which is an indicator of relative oxygenation or deoxygenation of the blood. Secondly, through the equation [O2Hb + HHb] total hemoglobin (tHb) can be calculated which can be used as an indicator of blood flow. Lastly, as with pulse oximeter O2 saturation (SpO2) the following equation [O2Hb/tHb x 100] yields a tissue saturation index (TSI) or skeletal muscle tissue oxygenation (StO2) in percent. Three questions are addressed in this study that attempt to bridge the gap between NIRS data as explained above and its application in the field.



Professor Loring Rowell (as citied in Joyner, 2004) identifies that the ability to increase blood flow and thereby oxygen uptake is ultimately a limitation of the cardiovascular system and or respiratory system, rather than the muscular system and thereby convincingly lends the muscular system the title of the “sleeping giant”. The legitimacy of this title is acknowledged by Calbet, Jensen-Urstad, van Hall, Holmberg, Rosdahl, & Saltin (2004) who identify that in elite cross country skiers

Sleeping Giant expression much older and source is :

“Skeletal muscle is a sleeping giant because its

capacity for vasodilatation could theoretically

overwhelm the modest pumping capacity of the

human heart and if this occurred arterial

pressure, the main regulated variable in the

cardiovascular system, might be threatened

(Marshall et al. 1961)“




Whole Body Exercise and Double Poling –

An Update on the Current Understanding”

OR (simply…)

DIA, W-Body & DP,”

H.-C. Holmberg,

Mid Sweden University, Östersund

Sweden Winter Sports Research Centre


Firstly, blood lactate measurements are an invasive , furthermore blood lactate is a systemic measurement and does not imply any direct association to any given muscle or muscle groups (even though it may be accurately assumed). NIRS data, on the other hand would at least allow a somewhat localized view of physiological processes during exercise without the confounding effects systemic intervention per se. measurement that requires blood sampling. Then, blood lactate sampling only gives information in single sample increments that identify blood lactate levels at the particular time of measurement. In other words, continuous measurement of blood lactate is rather difficult and definitely not feasible for a broader public. Lastly, blood lactate is for numerous reasons a very indirect measurement of aerobic or anaerobic metabolism. As already pointed lactate does not necessarily indicate a lack of O 2. "





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