自転車こぎ運動時の大腿および下腿部のOxy(Hb+Mb)の変化パターンについて

概要

論文の詳細を見る
The purpose of this study was to measure the balance of oxygen delivery and oxygenconsumption in the working muscle during the incremental cycling exercise. Using nearinfrared spectroscopy， we monitored the changes in oxygenated hemoglobin andmyoglobin [oxy(Hb+Mb)] of the vastus lateralis muscle (VL) and lateral part of thegastrocnemius muscle (LG) during the exhaustive cycle exercise. Studies were done inhealthy five male and one female volunteers while gas exchange parameters weremeasured. During exercise of relatively low intensity (up to 20%V02max)， oxy(Hb+Mb)increased from resting value in both VL and LG. ln VL，oxy(Hb+Mb) was sustained ordecreased slowly between 40 and 50% VO2max，and decreased linearly with the exerciseintensity at 50 to 80%V02max. Thereafter，it was sustained up to near 100%VO2max. InLG，on the 0ther hand， oxy(Hb+Mb) remained constant near resting levels duringexercise of moderate intensity(40 to 70%V02max). During exercise of higher intensity(above 70% V02max)， there was a rapid drop. These results indicated the difference in thepattern of oxy(Hb+Mb) change between VL and LG muscles during the exhaustiveincremental cycle exercise.