Post Number: 406
|Posted on Friday, May 09, 2008 - 12:54 am: |
As most of the readers by now may feel, is the fact, that we do not believe that absolute lactate values are very help full nor do they may exist.
There may be certain trends on specific people as for example. Athletes you see high lactate values ( above 10 and up ) versus athletes you may see mainly lower levels 3 - 5 perhaps.
No one of the possible reasons is not that the "lower " lactate readers not produce lactate , but we just can't see that in the blood stream.
One of the reasons may be the difference in muscle fiber situation ( more STF fibers ) than the other)
In extreme endurance athlete you see as a tendency lower maximal readings , compared to middle distance runners or sports in time situations of 1 - 3 minutes.
Here a very interesting point.
If we stressed so called low lactate responders so that we thought the STF fibers may be very tired and or overloaded and than tested all out effort the next day after a good R ( refuelling ) we could see higher lactate values , than when they were not tired.
The opposite can be produced, by overloading a FTF person with FTF workouts and than test the next day the lactate and you will see a trend of lover numbers.
This way we think we can use lactate readings in relative intensities to see recovery or overload on athletes the next few days as a a part of the idea to get a hand on recovery rather than workout. Remember IRIS stands for Individual recovery intensity system.
We had in a earlier discussion a horse trainer explaining the fact , that in race horses feeding glucose will increase the lactate readouts and the horses go faster.
So using absolute lactate numbers is about the same as using absolute heart rates / wattage and so on.
I like to show you some numbers from a group of athletes in different test situations but always with the subjective feeling on all out..
Test was done as a Lab test , Field test as well under race situations.
Test n Lactate mmol/l
Lab ergom 47 9.37 +- 2.36
Field test 43 11.66 +- 2.55
Race 1000 m 40 14.21 +- 1.82
Interesting numbers to keep in mind when we test inside versus real situations outside.
As well when we use absolute numbers from Lab to make training zones.
When we test LBP the same way we have interestingly much small to no difference between inside and outside in Heart rate numbers but big differences in wattage and feeling. Have a nice day Juerg
Post Number: 407
|Posted on Friday, May 09, 2008 - 01:55 am: |
Thanks for the question.
Here a summary .
How to explain this differences in lactate values ?
The answer may be very long if we go through many possibilities.
I like to make it very simple with the risk of being to simple.
1. The increase from the Lab test to the field test is mainly due to the fact of the "stability" meaning . if you kayak on a ergo trainer you are very stable compared with on the water, which means many muscles you use on the water to keep the boat stable are not used on the ergo trainer and therefor we have much less "producer" of lactate in the lab than we have on the water.
This will be clear as well in the level you may see on the heart rate ( max tested heart rate as well in the respiratory responds )
2. The additional increase from the field test to the race.
One of the main reason is the type of training short before big races , where after just a few specific trainings you can functionally shift the CGM controllers higher up (. The increase of this will allow you to accept a somewhat lower pH . The increased H+ production will increase the buffer activity of the lactate and there is an additional helper here which we often forget . The "help" of a hormone ( beta-endorphine ). as a "pain killer" See thread endorphine and exercise.
As higher the lactate as higher the endorphine and or perhaps the opposite as higher the endorphine as higher the lactate ?