Registered: 1340810797 Posts: 267
I've had a number of discussions with people about altitude training lately so I thought I'd share some data that Neal Henderson from the Boulder Center for Sports Medicine sent over.
The two graphs show the muscle oxygenation on the same athlete doing the same graded intensity test with and without supplemental respiratory oxygen. The tests were performed in Boulder which is at an altitude of about 5400 ft (1650 m). The muscle oxygenation is higher when supplemental oxygen is used as expected. It would be interesting to get arterial saturation in parallel with this test to help answer the question of how much of the increased muscle oxygen is due to higher arterial saturation versus how much is due to other effects like decreased load on the respiratory muscles. Big thanks to Neal for sharing the data!!! I'd love to hear comments on this. Roger
Fortiori Design LLC
Registered: 1355349061 Posts: 1,530
I was actually hoping there would be a great discussion starting on this topic here.
So let's start from my side. Supplemental O2 is a very old idea and it was very interesting m, when the first man was running below 4 min over a Mile ( Bannister ) and his O2 supplemental ideas of workouts. The great case we have above here shows one thing first. 1. MOXY as a tool to test for SmO2 works. What we do not know from this small case study is,, whether the additional O2 ( see T. Noakes) idea of CGM ) really had a beneficial effect on the perform,ace . What we have to be aware of is that a high SmO2 is just that a high SmO2 in the tested area. It does not tell us, whether we actually use the O2 or whether it is just there. It is the ongoing discussion on the question : What is Hypoxia . And I think the definition of the hypoxia is best covered with the term Hypoxia is the question of the BIO availability of oxygen to the cell. In other words, we have many case studies now , where we actually can see SmO2 increasing, but l lactate as well as an indirect information of metabolic demand on O2 independent ATP production in some cases. This is the same question we added to Antonio's interesting topic of hypoxia in the strength workouts. It looks that we have to use different informations in combination to make a better conclusion on SmO2 and its BIO availability of oxygen. Here what I mean : Is a drop of SmO2 a sign of Hypoxia or not ? Or another case study Andri and I did. Here the surprising trend. 1 Squatting till subjective exhaustion. First point of subjective failure was, when we reached a very low SmO2 . Than we did not stopped but kept going: Result SmO2 stopped dropping and reached a plateau. Pain was strong but Andri did not stop. third reaction. SmO2 drop in an inactive muscle as we had a equipment on the quadriceps as well one on an upper arm muscle. Summary : 1. Drop of SmO2 to a individual low level. 2. keep going Low level is fixed now and plateau is reached . 3. Low level stays and SmO2 in arm drops =down to the same level as legs. Careful : Just case study and no back up from any institution. You make your own conclusion and any loud thinking on here is welcome. Last Question to Mr. Henderson,. In this case study on supplemental O2. What where the cardiac information ( CO / SV and EF a well as LVET. 2. What where the respiratory information , three what were the metabolic information.. Thanks for the feedback.