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Effects of exhaustive stretch-shortening cycle exercise on muscle blood flow during exercise
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
University of Jyväskylä, Jyväskylä, Finland.
University of Jyväskylä, Jyväskylä, Finland.
University of Jyväskylä, Jyväskylä, Finland.
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2006 (English)In: Acta Physiologica, ISSN 1748-1708, E-ISSN 1748-1716, Vol. 186, no 4, 261-270 p.Article in journal (Refereed) Published
Abstract [en]

Abstract Aim: The influence of exhaustive stretch-shortening cycle exercise (SSC) on skeletal muscle blood flow (BF) during exercise is currently unknown. Methods: Quadriceps femoris (QF) BF was measured in eight healthy men using positron emission tomography before and 3 days after exhaustive SSC exercise. The SSC protocol consisted of maximal and submaximal drop jumps with one leg. Needle biopsies of the vastus lateralis muscles were taken immediately and 2 days after SSC for muscle endothelial nitric oxide synthase (eNOS) and interleukin-1-beta (IL-1beta) mRNA level determinations. Results: All subjects reported subjective muscle soreness after SSC (P < 0.001), which was well in line with a decrease in maximal isometric contraction force (MVC) and increase in serum creatine kinase activity (CK) (P = 0.018). After SSC muscle BF was 25% higher in entire QF (P = 0.043) and in its deep and superficial muscle regions, whereas oxygen uptake remained unchanged (P = 0.893). Muscle biopsies revealed increased IL-1beta (30 min: 152 +/- 75%, P = 0.012 and 2 days: 108 +/- 203%, P = 0.036) but decreased or unchanged eNOS (30 min; -21 +/- 57%, P = 0.050 and 2 days: +101 +/- 204%, P = 0.779) mRNA levels after SSC. Conclusion: It was concluded that fatiguing SSC exercise induces increased muscle BF during exercise, which is likely to be associated with pro-inflammatory processes in the exercised muscle.

Place, publisher, year, edition, pages
2006. Vol. 186, no 4, 261-270 p.
Keyword [en]
skeletal muscle, inflammation, perfusion, positron emission tomography, stretch-shortening cycle
Keyword [sv]
Idrottsvetenskap
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-3776DOI: 10.1111/j.1748-1716.2006.01532.xISI: 000237807500002Scopus ID: 2-s2.0-33645708609Local ID: 4043OAI: oai:DiVA.org:miun-3776DiVA: diva2:28808
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VR-Medicine, Internal

Available from: 2008-09-30 Created: 2009-06-07 Last updated: 2016-09-28Bibliographically approved

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Citation style
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