相关实验视频

Updated: Jan 17, 2026

In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig

In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig

Published on: September 3, 2021

在人腿筋中,肌肉内和肌肉间的剪切波速度分布在同度和偏心收缩期间

Pavlos E Evangelidis^1,2,3, Chi Yang⁴, Hoshizora Ichinose^4,5

¹Faculty of Sport Sciences, Waseda University, Shinjuku, Tokyo, Japan. p.evangelidis@exeter.ac.uk.

European journal of applied physiology

|September 18, 2025

概括

腿筋肌肉在它们的长度上表现出不同的刚性,特别是双腿骨长头 (BFlh). 这种肌肉异质性可能会增加受伤风险,这表明针对腿筋菌株的有针对性的预防策略.

科学领域:

生物力学生物力学
运动医学运动医学
肌肉骨研究研究

背景情况:

腿筋应变损伤 (HSI) 通常发生在双腿骨长头 (BFlh) 靠近肌结处.
不平等的肌肉特性可能会产生局部应变,增加HSI易感性,但在异常负荷时,这一点尚未得到充分探索.

研究的目的:

为了研究局部剪切波速度 (SWS),一个标记组织刚性和力传递,在BFlh和半 (ST) 肌肉.
为了在不同强度的同位数 (ISO) 和偏心 (ECC) 收缩期间比较SWS.

主要方法:

15名健康的男性在最大自愿扭矩 (MVT) 的10%,30%和50%时进行了ISO和ECC膝盖屈曲.
超声波弹性学测量了BFlh和ST中的SWS在近端和中部位置.
此外,还评估了BFlh笔角,带长度和肌肉厚度.

主要成果:

在各种条件中,BFlh表现出较低的近接SWS,而ST只在ISO收缩期间表现出这种情况.
在ECC期间,各地区之间标准化的SWS差异消失了,但在ISO期间在BFlh继续存在.
在ECC期间,BFlh架构与近邻SWS显示了适度的相关性.

结论:

腿筋肌肉显示特定区域的SWS,受被动机械性质的影响.
这种异质性可能导致局部应变度,并增加受伤风险.
这些发现表明HSI预防策略的潜在目标.

关键词:

奇特的收缩奇特的收缩腿筋腿筋腿筋腿筋肌肉的机械特性肌肉的机械特性肌肉应变损伤肌肉应变损伤剪切波弹性图形剪切波弹性图形

更多相关视频

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations

Published on: May 1, 2018

A Novel Application of Musculoskeletal Ultrasound Imaging

A Novel Application of Musculoskeletal Ultrasound Imaging

Published on: September 17, 2013

相关概念视频

Isotonic and Isometric Muscle Contractions

Isotonic and Isometric Muscle Contractions

Two primary types of muscle contractions are isotonic and isometric, each serving unique functions and involving distinct mechanisms. Both isotonic and isometric contractions are integral to the body's complex system of movement and stability. Isotonic exercises contribute significantly to functional strength and movement, while isometric contractions are crucial for maintaining posture and joint stability.
Isotonic contractions
Isotonic contractions occur when a muscle changes length while...

Excitation-Contraction Coupling in Skeletal Muscles

Excitation-Contraction Coupling in Skeletal Muscles

Excitation-contraction coupling is a series of events that occur between generating an action potential and initiating a muscle contraction. It occurs at the triad, a structure found in skeletal muscle fibers that comprise a T-tubule and terminal cisternae of the sarcoplasmic reticulum on each side. These triads are visible in longitudinally sectioned muscle fibers. They are typically located at the A-I junction — the junction between the A and I bands of the sarcomere.
When an action...