Fortiori Design LLC
Registered: 1355349061 Posts: 1,530
We have an ongoing process of discussing reactions of MOXy in involved and non involved muscle groups.
We could also ask: important or less important muscle groups. Example. In ice hockey the legs seem to be more involved in the overall action than the arms. So is the respond to defend oxygenation in the legs more important than maintaining O2 in the arms. On the other side we argue , that respiration is more important than moving, so if respiration is pushed to the limit the deoxygenation will happened n the legs to protect the more vital respiration. Here an interesting study supporting our points. Related trends in locomotor and respiratory muscle oxygenation during exercise. Laboratory of Human Movement Studies, Faculty of Sports Sciences and Physical Education, Lille University, Lille, France. 1 Abstract PURPOSE:
We investigated the potential effect of respiratory muscle work on leg muscle oxygenation without artificial intervention in non-endurance-trained young subjects and searched for the range of intensity when this effect could occur.
We simultaneously monitored accessory respiratory and leg muscle oxygenation patterns with near-infrared spectroscopy (NIRS) in 15 healthy young men performing maximal incremental exercise on a cycle ergometer. Pulmonary gas exchange was measured. The respiratory compensation point (RCP) was determined. Oxygenation (RMO2) and blood volume (RMBV) of the serratus anterior (accessory respiratory muscle) and of the vastus lateralis (LegO2 and LegBV) were monitored with NIRS. The breakdown point of accessory respiratory muscle oxygenation (BPRMO2) and the accelerated (BP1LegO2) and attenuated fall (BP2LegO2) in leg muscle oxygenation were detected.
BPRMO2 occurred at approximately 85% .VO2max and was related to RCP (r = 0.88, P < 0.001). BP2LegO2 appeared at approximately 83% .VO2max and was related to RCP (r = 0.57, P < 0.05) and with BPRMO2 (r = 0.64, P = 0.01). From BP2LegO2 to maximal exercise, LegBV was significantly reduced (P < 0.05).
In active subjects exercising at heavy exercise intensities, we observed that the appearance of
the accelerated drop in accessory respiratory muscle oxygenation-associated with high ventilatory level-was related with the attenuated fall in leg muscle oxygenation detected with near-infrared spectroscopy. This suggests that the high oxygen requirement of respiratory muscle leads to limited oxygen use by locomotor muscles as demonstrated in endurance-trained subjects. The phenomenon observed was associated with reduced leg blood volume, supporting the occurrence of leg vasoconstriction. These events appeared not only at maximal exercise but onward above the respiratory compensation point. Now here 2 test supporting this as well courtesy of Jiri. Example of a drop in trapezius and leg SmO2. As well as a high CO2 which would support the O2 disscurve shift to the right and enhances the drop in SmO2 And here an example of an athlete from the same group. where respiration may not be taxed to the limit and therefor stable O2 but leg muscels got pushed so they have a higher utilization , than delivery.?