Behavior of oxygen saturation and blood filling in the venous capillary system of the biceps brachii muscle during a fatiguing isometric action
- The objective of the study is to develop a better understanding of the capillary circulation in contracting muscles. Ten subjects were measured during a submaximal fatiguing isometric muscle action by use of the O2C spectrophotometer. In all measurements the capillary-venous oxygen saturation of hemoglobin (SvO2) decreases immediately after the start of loading and levels off into a steady state. However, two different patterns (type I and type II) emerged. They differ in the extent of deoxygenation (–10.37 ±2.59 percent points (pp) vs. –33.86 ±17.35 pp, P = .008) and the behavior of the relative hemoglobin amount (rHb). Type I reveals a positive rank correlation of SvO2 and rHb (? = 0.735, P <.001), whereas a negative rank correlation (? = –0.522, P <.001) occurred in type II, since rHb decreases until a reversal point, then increases averagely 13% above the baseline value and levels off into a steady state. The results reveal that a homeostasis of oxygen delivery and consumption during isometric muscle actions is possible. A roughThe objective of the study is to develop a better understanding of the capillary circulation in contracting muscles. Ten subjects were measured during a submaximal fatiguing isometric muscle action by use of the O2C spectrophotometer. In all measurements the capillary-venous oxygen saturation of hemoglobin (SvO2) decreases immediately after the start of loading and levels off into a steady state. However, two different patterns (type I and type II) emerged. They differ in the extent of deoxygenation (–10.37 ±2.59 percent points (pp) vs. –33.86 ±17.35 pp, P = .008) and the behavior of the relative hemoglobin amount (rHb). Type I reveals a positive rank correlation of SvO2 and rHb (? = 0.735, P <.001), whereas a negative rank correlation (? = –0.522, P <.001) occurred in type II, since rHb decreases until a reversal point, then increases averagely 13% above the baseline value and levels off into a steady state. The results reveal that a homeostasis of oxygen delivery and consumption during isometric muscle actions is possible. A rough distinction in two types of regulation is suggested.…
Author details: | Silas DechORCiDGND, Frank BittmannORCiDGND, Laura SchaeferORCiDGND |
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URN: | urn:nbn:de:kobv:517-opus4-460166 |
DOI: | https://doi.org/10.25932/publishup-46016 |
ISSN: | 1866-8364 |
Title of parent work (German): | Postprints der Universität Potsdam : Humanwissenschaftliche Reihe 618 |
Publication series (Volume number): | Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe (618) |
Publication type: | Postprint |
Language: | English |
Date of first publication: | 2020/04/14 |
Publication year: | 2020 |
Publishing institution: | Universität Potsdam |
Release date: | 2020/04/14 |
Tag: | O2C spectrophotometer; hemoglobin amount; isometric muscle action; muscle oxygenation |
Issue: | 618 |
Number of pages: | 11 |
First page: | 79 |
Last Page: | 87 |
Source: | European Journal of Translational Myology, 30 (2020), 1, 79-87 DOI:10.4081/ejtm.2019.8800 |
Organizational units: | Humanwissenschaftliche Fakultät |
DDC classification: | 6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit |
Peer review: | Referiert |
Publishing method: | Open Access |
License (German): | CC-BY-NC - Namensnennung, nicht kommerziell 4.0 International |
External remark: | Bibliographieeintrag der Originalveröffentlichung/Quelle |