Development Team Member
Registered: 1382660870 Posts: 65
To me athlete #1 is showing a delayed SmO2 at recovery therefore hypercapnic. I believe he has an O2 loading problem.
Both athletes 2 and 3 are showing signs of having a muscular limitation. Further to that discussion and slow twitch versus fast twitch here are two pictures of myself doing intensity. 30 seconds all out with recovery. In picture #1 I am running as hard as I possibly can however you can see I don't desaturate very much. In picture #2 one week later I played with trying to active my fast twitch fibers by invoking the Incredible Hulk IE: contracting hard and fast. This was very difficult for me to do physically and with no change in pace I was done after 28 seconds, couldn't continue physically or mentally although I perceived very little difference in my RF from picture #1. As you can see I was able to desaturate much further. I stopped at 4 because I felt unable to access my FTF anymore and even spent a bit of time walking because I couldn't get past the initial first 10 seconds of CP use to get to my STF. At the point I could run again my SmO2 returned to 90.
Fortiori Design LLC
Registered: 1355349061 Posts: 1,530
Here some thoughts to the three duathlon racers offered us by Sandy.
here her points : for me athlete #1 is showing a delayed SmO2 at recovery therefore hypercapnic. I believe he has an O2 loading problem. Both athletes 2 and 3 are showing signs of having a muscular limitationI like to show you my thinking process in this case. Now that does not mean it is the truth as I am very messy in my Brian. I just like to show you how I go about the interpretations options. And it is as always up for discussions as it is NOT the Gospel what I write on here. # 1 Here a closer look again and in the mean time in reviewing it again and again I would make one additional line for some thoughts. Where would you make an additional line ? Okay line by line : First line : time between 15 / 30 - SmO2 so hows a trend of dropping now so about 2 + min before the finish line he may have started an " end sprint. What we do not know is, whether the sprint was successful in the way that he really was running faster or he just worked harder. So SmO2 drops as an indication that at that point he used or utilized more O2 than he was able to deliver. Why this question: tHb may give a hint. If we increase intensity we would assume that we increase muscle contraction force. As such we would expect a compression outflow so tHb would drop. Do we see that in here ? If the contraction would be much harder we would see an increase in tHb due to venous outflow restriction. ?? Do we see that ? So we have a delayed tHb reaction, which asks the question, whether what we see is a systemic delay reaction ? What could it be. If it would be respiration , how would tHb react. Remember metaboreflex versus actual respiratory inability due to weakness of muscles. If it would be based on cardiac reaction ? what would we expect ? Try to go through all the options we discuss. Line 2 We see an ongoing drop in SmO2 still indicating a higher uti,lization than ability to deliver. BUT we now see a change in tHb. Now what creates and increase in tHb ??? List in your mind the options which can increase tHb and combine with the first line questions. Third line Well that is the missing one I would add in a discussion Time lien for this line ( missing line ) is by 120. Why would I add a line there what caught my eyes ? 4 th line Clear increase in SmO2 as a possible indication , that he dropped rapidly performance and as he immediately reduced O2 demand form the working muscles but delivery is still in full swing we see the sharp increase in delivered O2 as nobody asks for it or less demand but still great delivery. What is interesting is, that despite a reduced activity of muscles the tHb does NOT react the same . so the expected lack of muscle compression does not show up as a clear increase in tHb in fact when looking at tHb we would not expect that the race may be over here in fact if looking at tHb we would argue second line could be end of race or 5 th line 5 th line . SmO2 still increasing so still higher delivery than demand but we have a stop of increase. So what is the reason of this reactions.