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Development Team Member
Posts: 59
Say we do some set of intervals with a regular warm up.
We get some SmO2/Thb graph showing fairly steep muscle
desaturation and (hopefully) recovery. A perfect curve may look
like this:

Now let's speculate that we modify our training session and do the following:

1. Case 1: We "pre-load" the muscle so that lactate value at the beginning of the
interval is large. Assume we can do this without stressing cardiac/respiratory.

2. Case 2: We do a very long "easy" session (so, cardiac/respiratory/muscles had a fair
amount of stress, but they are not completely shot).

Now we perform intervals. How would SmO2/Thb graphs look like for Case 1 and Case 2
compared to the ideal case above?

I am of course aware that especially in Case 2, the graph will almost certainly depend on
on what your limiter/compensator is.

Related question: is there a big physiological benefit of preloading some system?
It seems to me that the main effects could be:
a) compensator training (ie, limiter may have reached a limit, so compensator has taken over)
b) limiter training
It seems that the case for limiter training here is pretty weak since e have already weakened
already weak system.


Development Team Member
Posts: 1,501
Great points  and great  thoughts.
 Here some  ideas  to it :
 1. This is the weakness, when you only  take SmO2.
 You need  to learn to intergate tHb  as  there are different reasons  why  SmO2  drops.
 a) Delivery  limitation  due  to occlusion reaction in the  load.
 b)   still available   blood flow
c)  outflow restriction due to  the load 
 So  any of this three will  create a different outcome to your  questions.

The  pre load  of lactate is a fascinating options for a  whole  set of physiological stimulations.

Here  an  old  case study long  time back  done  with Portamon. with a  world  class  athlete  where we  were looking  at options of pre loading lactate  with different interventions. Top green is  TSI  % in the  bottom  graph  with red  and blue  green is  tHb  . The  first   lactate number is  immediately  taken after  the   interval , the  second number is taken 3 min  later. The goal  was  to  keep or  even increase lactate during the  rest period  . Practical use as  preparation for  certain events  or  during  certain races. 
That is  the   idea  for performance   improvement.
 What  I use it  much more is  for physiological stimulation of  MCT   1  and MCT  4  proteins. 
3min step test 1.jpg 

Now  as usual  we where   at that time not only looking  at  NIRS  and lactate in cases  like this  but as well how  the  cardiac  and or the respiration would react.

Below  three  loads as you can see, 2  are manipulated  differently  and   the  interesting  part is , that we in fact  are able to  manipulate   cardiac reactions  as well.

sv co  and HR  reactions.jpg 

Top left is HR   to right is  SV
Bottom left green is  HR  x  SV  = CO  and   bottom left is  EF  % ( ejection fraction %)

Now   the  next part  to combine  to get a full picture  or nearly a full picture  is to look at  respiratory manipulation and  SmO2  ( tHb ) reactions  .

Now  the below  case studies  where  done by Nick  Mclean  now  in Australia    for his  masters. Nick  was a local student  who  was  a part of  our grade 10 - m12  exercise physiological   play  time.

The idea  was  Pe  load  of different physiological  systems  to create a specif  stimulus  for a   specific  physiological target. Examples  are  specific  preloads  for  a  follow up  right ventricular load.
 Or  for MCT  1 stimulation,  or  for intermuscular stimulation  or  for blood  volume shift  from one  body are  to another.. This  steps  are  very helpful where there is  time  restriction for example  or  where we have to avoid  overloading  certain  systems  like in COPD  clients  or  in cardiac clients   and others like  restriction of load due  to post ops  restriction.

Here a manipulation in recovery  and workout length  using a  specific  respiratory  device.

Spior non Spiro.jpg

Always the same load but different interventions  which  as you can see changed  the  duration off the performance.

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