Changes in Muscle Shear Modulus and Urinary Titin N-Terminal Fragment after Eccentric Exercise
Changes in Muscle Shear Modulus and Urinary Titin N-Terminal Fragment after Eccentric Exercise
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DOI：
10.52082/jssm.2022.536
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发表时间：
2022-10-15
影响因子：
3.2
通讯作者：
Murayama, Mitsuyoshi
中科院分区：
文献类型：
--
作者：
Inami, Takayuki;Yamaguchi, Shota;Murayama, Mitsuyoshi
本研究旨在探讨离心运动后肱二头肌剪切模量、尿肌联蛋白N端片段（UTF）与其他损伤指标之间的关系。17名健康男性进行了五组10个离心练习，哑铃重量的50%的最大随意收缩（MVC）在手肘关节。肌肉剪切模量的范围设置为只有肱二头肌肌肉的超声剪切波弹性成像，UTF，MVC，运动范围（ROM），和酸痛（SOR）测量的兴趣被记录之前，之后立即，1，24，48，72，96，和168小时后离心运动。每个标记物的变化在一个时间过程中的模式，在以前的研究中发现。峰值剪切模量与峰值MVC呈中度负相关（r =-0.531，P < 0.05），与峰值UTF呈强正相关（r = 0.707，P < 0.01）。我们的研究结果揭示了肌肉力量之间的显着关系，剪切模量测量超声SWE，和肌联蛋白测量UTF，作为一种非侵入性的损伤标记物离心运动后跟踪EIMD的变化。
This study aimed to investigate the relationship between the muscle shear modulus of the biceps brachii, urinary titin N-terminal fragment (UTF), and other damage markers after eccentric exercise. Seventeen healthy males performed five sets of ten eccentric exercises with dumbbells weighing 50% of the maximum voluntary contraction (MVC) at the elbow joint. Muscle shear modulus with range of interest set to only biceps brachii muscle measured by ultrasound shear wave elastography, UTF, MVC, range of motion (ROM), and soreness (SOR) were recorded before, immediately after, and 1, 24, 48, 72, 96, and 168 h after eccentric exercise. Each marker changed in a time course pattern, as found in previous studies. The peak shear modulus showed a moderate negative correlation with peak MVC (r = -0.531, P < 0.05) and a strong positive correlation with peak UTF (r = 0.707, P < 0.01). Our study results revealed a significant relationship between muscle strength, shear modulus measured by ultrasound SWE, and titin measured by UTF, as a non-invasive damage marker after eccentric exercise to track changes in EIMD.