Deep muscle deoxygenation during exercise

2015 Fiscal Year Final Research Report

• Project/Area Number: 26560362
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Sports science
• Research Institution: Kobe Design University
• Principal Investigator: KOGA SHUNSAKU 神戸芸術工科大学, 芸術工学部, 教授 (50125712)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 深層筋における酸素動態 / 活動筋

Outline of Final Research Achievements

Near-infrared assessment of skeletal muscle is restricted to superficial tissues due to power limitations of spectroscopic systems. We reasoned that understanding of muscle deoxygenation may be improved by simultaneously interrogating deeper tissues. To achieve this we modified a high-power time-resolved near-infrared spectroscopy system (TRS-NIRS), to increase depth penetration. Superficial and deep spectroscopy was performed in 6 participants during heavy-intensity cycle exercise. Compared with the superficial rectus femoris (RF), peak deoxygenation of the deep RF (including the superficial intermedius in some) was not significantly different, but deoxygenation kinetics were significantly slower. These data validate a high-power TRS-NIRS system with large OS for measuring the deoxygenation of deep tissues, and reveal temporal and spatial disparities in muscle deoxygenation responses to exercise.

Free Research Field

運動生理学