Validation of Muscle Ultrasound Speckle Tracking and the Effect of Nordic Hamstring Exercise on Biceps Femoris Displacement

IF 2.4 3区医学 Q2 ACOUSTICS

Ultrasound in Medicine and Biology Pub Date : 2025-01-24 DOI:10.1016/j.ultrasmedbio.2025.01.005

Chun-Yu Chou , Wei-Ning Lee , Kun-Lin Hung , Yi-Ju Tsai , Ming-Wei Wang , Adam Kawczyński , Sebastian Klich , Peemongkon Wattananon , Hsing-Kuo Wang

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Abstract

Objective

This study aimed to validate the ultrasound speckle tracking (UST) algorithm, determine the optimal probe location by comparing normalized cross-correlation (NCC) values of muscle displacement at two locations (proximal vs. middle) of the biceps femoris long head (BFlh) using the UST, and investigate the effects of Nordic hamstring curl exercise (NHE) training on BFlh displacement.

Methods

UST efficacy was verified with ex vivo uniaxial testing of porcine leg muscles. Ten participants (mean age 23.4 y) were recruited for comparison of NCC values between the proximal and middle BFlh during maximal knee flexor eccentric contraction using an ultrasound device and isokinetic dynamometer. Using the above devices, electromyography and shear wave elastography, the effects of an 8-wk NHE program on the morphomechanical profiles, displacement and activation of the middle BFlh and eccentric torque of the knee flexor were investigated in 20 males (mean age 23.5 y).

Results

The validity of UST was confirmed by comparing UST and ex vivo test results (r = 0.99). The NCC values of the middle BFlh were greater than those of the proximal BFlh. The caudal-direction displacements of the BFlh in the dominant leg were reduced after the NHE training (from 3.98 ± 3.84 to 1.50 ± 4.17 mm, p < 0.05). The magnitude of reduction was associated with improved eccentric strength of the knee flexor muscle in the dominant leg (r = 0.63).

Conclusions

UST is a validated tool for measuring muscle displacement. NHE training decreased caudal-direction muscle displacement in the BFlh and increased eccentric strength.

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肌肉超声斑点追踪的验证和北欧腘绳肌运动对股二头肌移位的影响。

目的：本研究旨在验证超声斑点跟踪（UST）算法，利用UST比较股二头肌长头（BFlh）两个位置（近端和中端）肌肉位移的归一化相互关系（NCC）值，确定最佳探头位置，并探讨Nordic hamstring curl exercise （NHE）训练对BFlh位移的影响。方法：采用猪腿肌离体单轴实验验证其疗效。招募10名参与者（平均年龄23.4岁），使用超声装置和等速测力仪比较最大屈肌偏心收缩时近端和中端BFlh之间的NCC值。使用上述装置、肌电图和剪切波弹性图，研究了8周NHE计划对20名男性（平均年龄23.5岁）膝关节屈肌的形态力学特征、中间BFlh的位移和激活以及偏心扭矩的影响。结果：通过比较UST和离体测试结果，证实了UST的有效性（r = 0.99）。中端BFlh的NCC值大于近端BFlh。NHE训练后，优势腿BFlh的尾向位移减小（从3.98±3.84 mm降至1.50±4.17 mm, p < 0.05）。复位幅度与主侧腿膝关节屈肌偏心强度的改善相关（r = 0.63）。结论：UST是一种有效的测量肌肉位移的工具。NHE训练减少了BFlh的尾向肌肉位移，增加了偏心力量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ultrasound in Medicine and Biology 医学-核医学

CiteScore

6.20

自引率

6.90%

发文量

325

审稿时长

70 days

期刊介绍： Ultrasound in Medicine and Biology is the official journal of the World Federation for Ultrasound in Medicine and Biology. The journal publishes original contributions that demonstrate a novel application of an existing ultrasound technology in clinical diagnostic, interventional and therapeutic applications, new and improved clinical techniques, the physics, engineering and technology of ultrasound in medicine and biology, and the interactions between ultrasound and biological systems, including bioeffects. Papers that simply utilize standard diagnostic ultrasound as a measuring tool will be considered out of scope. Extended critical reviews of subjects of contemporary interest in the field are also published, in addition to occasional editorial articles, clinical and technical notes, book reviews, letters to the editor and a calendar of forthcoming meetings. It is the aim of the journal fully to meet the information and publication requirements of the clinicians, scientists, engineers and other professionals who constitute the biomedical ultrasonic community.