Another often asked question, when we make presentation in top teams and groups.
Why only you guys do that and why is it not use more often.
Stupid answer we can give is : Why did only Fosbury flopped in Mexico city. Why did only Sitonen used a one skate double pole step in hi victory in the engadin marathon. Why did it took over 150 years for the British admiralty to make Vit C mandatory on long ship travels despite the findings 150 years earlier to avoid "scorbut" The smarter answer would be :
We are really not alone at all, There are more and more great studies coming out. Main problem. Nobody reads them who actually works practically as coaches and in the field or at least very few seem to read it, otherwise we would not get this question. Here a nice one to show, that when using NIRS you can see a lot more locally but as well systemically if you place the MOXY on the different points of interests. See in red our wording we would use.
Changes in blood volume and oxygenation level in a working muscle during a crank cycle.
Takaishi T1, Sugiura T, Katayama K, Sato Y, Shima N, Yamamoto T, Moritani T.
This study examined circulatory and metabolic changes in a working muscle during a crank cycle in a pedaling exercise with near-infrared spectroscopy (NIRS).
NIRS measurements sampled under stable metabolic and cadence conditions during incremental pedaling exercise were reordered according to the crank angles whose signals were obtained in eight male subjects.
The reordered changes in muscle blood volume during a crank cycle demonstrated a pattern change that corresponded to changes in pedal force and electrical muscle activity for pedal thrust. The top and bottom peaks for muscle blood volume change at work intensities of 180 W and 220 W always preceded (88 +/- 32 and 92 +/- 23 ms, respectively) those for muscle oxygenation changes. Significant differences in the level of NIRS parameters (muscle blood volume and oxygenation level) among work intensities were noted with a common shape in curve changes related to pedal force. In addition, a temporary increase in muscle blood volume following a pedal thrust was detected at work intensities higher than moderate. This temporary increase in muscle blood volume might reflect muscle blood flow restriction caused by pedal thrusts.
We describe this as blood flow outflow restriction due to a venous occlusion trend
The results suggest that circulatory( we name this delivery ) and metabolic( we name this utilization ) conditions of a working muscle can be easily affected during pedaling exercise by work intensity. The present method, reordering of NIRS parameters against crank angle, serves as a useful measure in providing additional findings of circulatory dynamics and metabolic changes in a working muscle during pedaling exercise.