| Project/Area Number |
10680058
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
体育学
|
|---|
| Research Institution | Research Institute of Physical Fitness, Japan Women's College of Physical Education |
|---|
Principal Investigator |
KAGAYA Atsuko Research Institute of Physical Fitness, Japan Women's College of Physical Education, Professor, 体育学部・附属基礎体力研究所, 教授 (80083096)
|
|---|
| Project Period (FY) |
1998 – 1999
|
| Project Status |
Completed (Fiscal Year 1999)
|
| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1999: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1998: ¥3,200,000 (Direct Cost: ¥3,200,000)
|
|---|
| Keywords | static plantar flexion / fascicle length / femoral arterial blood flow / tissue oxygen saturation / angle of ankle joint / 動的足底屈運動 / 筋活動強度 / 血液量 / 酸素化ヘモグロビン / 脱酸素化ヘモグロビン / 腓腹筋 / 筋線維走行角度 |
|---|
| Research Abstract |
The purpose of this study was to determine the effect of muscle architecture changes on muscle circulation during exercise. Fascicle length, muscle oxygenation, and femoral arterial blood flow were measured during static plantar flexion exercise using B-mode ultrasound method, near-infrared spect-roscopy, and Doppler ultrasound method, respectively. Femoral arterial blood flow was higher during exercise at 110 deg of ankle joint angle compared to that at 90 deg, whereas immediate post-exercise blood flow was lower at 110 deg. Fascicle length was more shortened at 110 deg compared to 90 deg. The estimated tension developed in the muscle at 90 deg and 110 deg were not significantly different, though the maximal torque at the ankle joint was significantly higher at 90 deg. Consequently higher blood flow at 110 deg will be attributable to shorter muscle fiber length. However, muscle oxygenation during exercise did not differ between 2 ankle joint positions. During dynamic plantar flexion exercise at the frequency of 15/min, the muscle oxygen action of calf muscle and femoral arterial blood flow fluctuated during each duty cycle depending on the muscle contraction and relaxation. These changes predominatly depend on the alteration of the muscle tension rather than due to changes in the muscle architecture.
|
