The Relationship Between a Muscle Fiber Recruitment Pattern and a Tissue Oxygenation Level on Isometric Contractions with Vascular Occlusion
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.29 Vol.29】
This study examined how muscle ischemia influence tissue oxygen kinetics and a recruitment pattern of muscle fiber in the same intramuscular distal and proximal part of vastus lateralis. We measured changes in near-infrared spectroscopy (NIRS) and in surface EMG during knee extension movement at 10, 30 and 50%MVC in cuff ischemia and non-cuff ischemia conditions. Four adult male subjects were examined. Deoxygenation during knee extension was higher in distal part than in proximal part at 10%MVC with and without cuff ischemia. Cuff ischemia during muscle contraction influences tissue oxygen kinetics, but a recruitment pattern of muscle fiber is not necessarily influenced.
DESCENTE SPORTS SCIENCE Vol.29/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
DESCENTE SPORTS SCIENCE Vol.29/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | Yutaka Kano*1, Kazuyuki Mito*2 |
|---|---|
| University or institution | *1 Department of Applied Physics and Chemistry, University of Electro-Communications, *2 Department of Systems Engineering, University of Electro-Communications |
Keywords
muscle ischemia, tissue oxygen kinetics, recruitment pattern of muscle fiber, surface EMG, Cuff ischemia