I like to show an incredible case study done by Ruud in the Netherlands and sent to us for discussion.
Here a very small inside into this discussion behind the scene.
And here one feedback mailed to me and it is so much fun to see how coaches start to think physiologically.
This is a great loud thinking done by a top coach Brian Kozak Next level coaching, who runs clinics and coaches some of the top NHL players.
here to enjoy and it is nearly scary to see, that they start to be a real " competition" when it comes to analyze ideas and information.
Ok, Speaking or typing from the basics to understand what I see before the WHY
SmO2 flat or slight increase at Bonk and during Bonk 60% to 80%
tHb flat and then drop approx. 12.5 then down to 10.7
hrt between 120 to 140 with a slight rise at Bonk then slight drop
Wattage looks light slight drop
So why the drop in tHb and how does this make sense based on what we know:
Moxy measures the ratio of the oxyhemoglobin concentration to the total hemoglobin concentration in the muscle and reports it as a percentage, which is Smo2, which is the % of hemoglobin that is carrying O2 in muscle tissue. Hemoglobin is the molecule in red blood cells that actually carries O2from the lungs to where it is needed in the body Hemoglobin most common states are oxy and de-oxy. The measurement of SmO2 takes place in the capillaries of the muscle. This is where O2 is being consumed. SmO2 can be thought of as a measure of the balance between supply and demand for O2 in the muscle. (from the Moxy site).
So, from the data and graphs, how can SmO2 stay relatively stable or increase while tHb has a sudden drop...if the total Hemoglobin drops and the SmO2, which is the ratio of oxy concentration to the total Hemoglobin, does not-means, what|? Juergs's Jars of concentration is happening, meaning - What we see is that SmO2 does not change, so the ratio of oxyhemoglobin concentration is still 80% but 80% of 100 thb is a different number versus 80% of 1000 thb. So, following the rabbit down the hole, Ruud has 100tHb at 80% SmO2 = 80 O2 to maintain 200 watts and then Bonk and 50 tHb at 80% SmO2 for 40 O2 to maintain 200 watts and the struggle to make it home. So why the sudden drop? Just like being stranded on top of a mountain and the CG diverts the O2 to where needed for survival...but why?
Is this a picture of the 'Perfect Storm' where not just one factor, i.e. glycogen depletion, but more...i.e. dehydration, mental stress, outside temp...if O2 independent energy is dependent on O2 then is Glycogen is low does it make sense that the CG diverts O2 from the legs to...from an athletes' perspective, when we identify the early symptoms of Bonking can we adjust Breathing to see change ph to last longer or offset, drop wattage slightly...change gears to a coordination level which allows for less O2. Some thoughts...but walking through has allowed me to understand the SmO2 and tHb more clearly...here is a basketball athlete doing a RIP (explosive squats to a wall touch and repeat) look at the sudden drop in tHb and increase in SmO2..not a bonk but have not seen before.
thank for mental gymnastics,