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Juerg Feldmann

Fortiori Design LLC
Posts: 1,530
I had some mails with some great question.
 How much bigger is the "cockpit" growing in any kind of sport.
 How many data's  do I need in front of my bike or when running or doing any kind of activity.?

 One of the latest add on is the power meter from Rotor with an independent wattage ( power ) info on each pedal.
I am biased as I am interested  more in the physiological information's of performance . True, it is nice to have physical information as well to see, how  and why physical information alone are not a great tool for training intensity control.
 As so often a combination may be the way to go , but than again , where do I overload it with info and where do I stop  with investing money in a toy .
 Here  some thoughts for the regular reader.

1. What is possibly most important to know, when you take  rental car and plan to  drive to a certain destination..
 Now  you know the distance to the destination  and that is all.
 You sit in the car and you have  your "cockpit" ahead of you .
 info's you get :
 ( Power )
 RPM, temperature, Time, GPS,, Size of gas tank.
 Tire pressure,a.s.o
What do you need most to be sure , whether you make it to the destination?
Fuel consumption ???.

 How about the information to know how much energy ( Fuel ) you have and how much you use or need, when driving under certain conditions ( Speed, Gear, Temperature, Altitude a.s.o. )
Perhaps most important may be to know how much energy you use and where you may be most efficient with the use of it and where you may   use far too much  or where you could recover some by " driving " a certain way.

 When we move that over to a sport activity.

 If  you bike, how much do you really  need wattage to understand the energy use of that effort you just apply.
 How much do you need RPM alone, or how much HR alone.
 If you use one single info, perhaps most important may be to know, whether the intensity you  bike is an intensity , where you have nearly limitless O2 intake and use less than you can supply. Or whether you are in an intensity , where the  delivery and the   need is balanced or whether the intensity you bike will reach earlier or late a problem as delivery is less than the need for O2 supply.
 Once you  know this trends as either trends or if properly assesed even as absolute numbers ,you can than use all the other infos  with more values. You now  understand why 200 watt today  feels different than yesterday . You now know, why the HR is different by the same wattage today than yesterday.
 You now understand why the RF is higher today than yesterday and you know,  why you have to adjust your wattage , if you like to reach your destination today in the same  physiological  state as you did yesterday.
  In  short  words.
 The  perhaps most interesting information today may be the information on the use of O2  during your workout.
 Why do we not use this information.?
 Well we did not had MOXY as of yet , but in the near future. we may see many tools and toys to be able to  look for the ability to add MOXY to the information to enhance the value of the existing information you where gathering since many years.
What is the value of having independent wattage ( power ) information of your left and right foot, when you do not know, whether the higher power on the left side can be really sustain with O2 delivery or not.
 There are some very interesting studies done with NIRS in short track speedskating who adress this interesting dysbalance. 

Med Sci Sports Exerc. 2012 Mar;44(3):501-8. doi: 10.1249/MSS.0b013e31822f8942.

Asymmetry of quadriceps muscle oxygenation during elite short-track speed skating.

Hesford CM, Laing SJ, Cardinale M, Cooper CE.


Department of Biological Sciences, University of Essex, United Kingdom.



It has been suggested that, because of the low sitting position in short-track speed skating, muscle blood flow is restricted, leading to decreases in tissue oxygenation. Therefore, wearable wireless-enabled near-infrared spectroscopy (NIRS) technology was used to monitor changes in quadriceps muscle blood volume and oxygenation during a 500-m race simulation in short-track speed skaters.


Six elite skaters, all of Olympic standard (age = 23 ± 1.8 yr, height = 1.8 ± 0.1 m, mass = 80.1 ± 5.7 kg, midthigh skinfold thickness = 7 ± 2 mm), were studied. Subjects completed a 500-m race simulation time trial (TT). Whole-body oxygen consumption was simultaneously measured with muscle oxygenation in right and left vastus lateralis as measured by NIRS.


Mean time for race completion was 44.8 ± 0.4 s. VO2 peaked 20 s into the race. In contrast, muscle tissue oxygen saturation (TSI%) decreased and plateaued after 8 s. Linear regression analysis showed that right leg TSI% remained constant throughout the rest of the TT (slope value = 0.01), whereas left leg TSI% increased steadily (slope value = 0.16), leading to a significant asymmetry (P < 0.05) in the final lap. Total muscle blood volume decreased equally in both legs at the start of the simulation. However, during subsequent laps, there was a strong asymmetry during cornering; when skaters traveled solely on the right leg, there was a decrease in its muscle blood volume, whereas an increase was seen in the left leg.


NIRS was shown to be a viable tool for wireless monitoring of muscle oxygenation. The asymmetry in muscle desaturation observed on the two legs in short-track speed skating has implications for training and performance

 What  do we need. ?
 A new vision and an open mind to accept the fact , that  a physiological system is not a physical motor with  a repetable efficiency but rather a very  lively  body , which, when properly observed can  give some incredible fun and interesting feedback on why we feel the way we feel today and why we felt the way we felt yesterday.
 It all ends up with the Greek MATERIALISM.
  the unseen real versus the unreal seen.
 Is wattage the real information seen or is MOXY the  real information unseen but now available.

 Stay tuned for the release of MOXY to the bigger public and stay tuned  to see seminars and workshops coming up in places close to you.
 Stay tuned to learn how much fun it is to start to understand, why a  higher RF today shows a different oxygenation than yesterday.
 Why a the same wattage can't be sustain today,
 why a higher RPM today  is different than last week and how the body shows you how this changes are accepted by looking at the oxygenation and de-oxygenation situation.

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