Effects of exhaustive stretch-shortening cycle exercise on muscle blood flow during exercise

被引:21
|
作者
Laaksonen, M. S.
Kivela, R.
Kyrolainen, H.
Sipila, S.
Selanne, H.
Lautamaki, R.
Nuutila, P.
Knuuti, J.
Kalliokoski, K. K.
Komi, P. V.
机构
[1] Mid Sweden Univ, Dept Hlth Sci, IHV, SE-83125 Ostersund, Sweden
[2] Univ Turku, Turku PET Ctr, Turku, Finland
[3] Univ Jyvaskyla, Neuromuscular Res Ctr, Jyvaskyla, Finland
[4] Univ Jyvaskyla, LIKES Res Ctr, Jyvaskyla, Finland
[5] Univ Jyvaskyla, Dept Hlth Sci, Jyvaskyla, Finland
[6] Univ Turku, Dept Med, Turku, Finland
关键词
inflammation; perfusion; positron emission tomography; skeletal muscle; stretch-shortening cycle;
D O I
10.1111/j.1748-1716.2006.01532.x
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
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-1 beta) 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-1 beta (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 proinflammatory processes in the exercised muscle.
引用
收藏
页码:261 / 270
页数:10
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