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Muscle architecture change due to exercise and its effect on muscle circulation

运动引起的肌肉结构变化及其对肌肉循环的影响

基本信息

批准号：
10680058
负责人：
KAGAYA Atsuko
金额：
$ 2.24万
依托单位：
Research Institute of Physical Fitness, Japan Women's College of Physical Education
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10680058/
关键词：
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

项目摘要

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.

本研究的目的是确定运动过程中肌肉结构变化对肌肉循环的影响。分别采用B超、近红外线内窥镜和多普勒超声测量了静态跖屈运动时肌束长度、肌氧合和股动脉血流量。股动脉血流量在110 °踝关节角运动时高于90 °，而运动后即刻血流量在110 °踝关节角运动时低于90 °。与90 °相比，110 °下的束长度缩短更多。在90 °和110 °时，肌肉中产生的估计张力没有显著差异，尽管踝关节处的最大扭矩在90 °时显著更高。因此，在110度时较高的血流量将归因于较短的肌纤维长度。然而，在运动过程中的肌肉氧合没有不同的2踝关节的立场。在频率为15/min的动态跖屈运动中，小腿肌肉的肌氧作用和股动脉血流在每个占空比内波动，取决于肌肉的收缩和舒张。这些变化主要取决于肌肉张力的改变，而不是由于肌肉结构的变化。