juergfeldmann
Development Team Member
Registered:1380484167 Posts: 1,501
Posted 1441119690
#31
Thanks for the repeat of questions, as this "stickiness" is not just sticky but even the top guys in exercise physiology and people working a lot with ideas like this have to think twice and I my self catch myself to really concentrate when looking at this issues. So try short. CO2 is high than the curve shift to the right side making it easier to take O2 from Hb and move it to the cell so in sticky words it is less sticky to Hb. Therefor it is somewhat harder to load O2 from the lungs to the blood. Practical ideas. Hold your breath and have a SpO2 sensor on your finger which gives you a information on how high % you load O2 to the arterial blood from the lungs. . So SpO2 will drop as you have more problems to load O2 to the blood from the lungs. Due to this fact you still will try to use O2 for your activity and as a comp0esnation the less O2 on the blood will be compensated with a better use and you will see that in a drop in SmO2. Let's go till here step by step. Not just for us but for many who still heavily argue, that respiration is never a limitation. Respiration has a huge impact on how we are able to access O2. So called bio availability. Hypoxia really is the question of bio availability and yes altitude creates a problem for bio availability but we can create that any time when understanding the reactions we can create on the O2 disscurve and can easy integrate this into our daily workouts
juergfeldmann
Development Team Member
Registered:1380484167 Posts: 1,501
Posted 1441120027
· Edited
#32
Now your follow up is absolutely perfect and I will open a thread Rachel to use here as she allowed this to us as a case ideas. In very short. For ultra distance runners. Do we really care about " Utilization or drop of SmO2. Or is the key delivery. Yes you made all perfect from the conclusion and I will try to show the interesting situation we have with Rachel and some nice observation in this case. So be patient as we have to go step by step and again it is not a cook book and yes it is a utilization limitation but is it good or bad. ? so stay tuned.
Rachel
Development Team Member
Registered:1440808720 Posts: 15
Posted 1441225890
#33
Was able to get my Sm02 to drop with a C02 run last night. Have to say, that was really exciting. I'll wait for the other tread to open and share the results.
juergfeldmann
Development Team Member
Registered:1380484167 Posts: 1,501
Posted 1441227838
#34
Rachel first thanks for trying some cray ideas. second I will take time this evening to use your feedbacks and try to add some additional answers to s many great mails I got. I will as promised start a special Rachel thread as I like to sort things a little bit out.
DanieleM
Development Team Member
Registered:1412923680 Posts: 264
Posted 1441340214
#35
Thanks Clint for the useful presentation. In your answers I see this point:If we see a sharp drop in SmO2 that happens at the same time we see a spike in EMG, then we have to look at tHb to see if there's an occlusion being created by additional muscle fiber recruitment . We have seen several cases of occlusions trend in the forum and my understandings is that it depends on the high pressure of the muscles on the veins which limit/prevent the outflow of the blood at least during contraction (I guess that outflow is still ok during the relaxation of the muscle). Now let's say that I push X watt and at a certain point I have to increase the muscle fiber recruitment to keep the same wattage, I would expect that the pressure is actually lower. Daniele
juergfeldmann
Development Team Member
Registered:1380484167 Posts: 1,501
Posted 1441378037
#36
That is a very great question and will create some interesting debate . So let's see what thoughts we get form this before I show some ideas and case studeis on that specific occurrence. Great thoughts Daniele.