Lima Kelly, Martins Natália, Pereira Wagner, Oliveira Liliam
Laboratory of Biomechanics of the Biomedical Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
Laboratory of Ultrasound of the Biomedical Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
Muscles Ligaments Tendons J. 2017 Sep 18;7(2):347-352. doi: 10.11138/mltj/2017.7.2.347. eCollection 2017 Apr-Jun.
Supersonic Shear Imaging (SSI) is a technique which analyses quantitatively the tissue properties in real time. The relation between joint torque and Young's modulus (E) of the agonist muscles is important for obtaining stratification values and ranges of normality. The aim of this study was to evaluate the intra and intersessions reliability of the E values of the Achilles tendon and medial gastrocnemius muscle, bilaterally, during rest, and correlate them with the isometric plantarflexion peak torque.
Shear modulus maps were acquired bilaterally in Achilles tendon (AT) and medial gastrocnemius (MG) muscle of 24 healthy male volunteers. Two 5-second plantarflexion maximal voluntary contractions were performed with a 40-seconds interval and correlated with E values.
a good intrasession reliability (intraclass correlation coefficient- ICC= 0.821-0.986) and a weak Pearson's correlation was found between E values and peak torque (r= 0.022 to -0.202) for both limbs (P > .05).
E values cannot be predictive of the triceps surae force production in untrained men. It could be helpful, otherwise, to monitor a chronic strength adaptation after an exercise intervention or rehabilitation program.
IIb, individual cohort study.
超音速剪切成像（SSI）是一种实时定量分析组织特性的技术。关节扭矩与主动肌杨氏模量（E）之间的关系对于获得分层值和正常范围很重要。本研究的目的是评估双侧跟腱和腓肠肌内侧在静息状态下E值的组内和组间可靠性，并将它们与等长跖屈峰值扭矩相关联。
对24名健康男性志愿者的双侧跟腱（AT）和腓肠肌内侧（MG）肌肉获取剪切模量图。进行两次持续5秒的跖屈最大自主收缩，间隔40秒，并与E值相关联。
发现组内可靠性良好（组内相关系数-ICC = 0.821-0.986），并且双下肢E值与峰值扭矩之间的皮尔逊相关性较弱（r = 0.022至-0.202）（P>.05）。
E值不能预测未经训练男性的小腿三头肌力量产生。否则，在运动干预或康复计划后监测慢性力量适应可能会有帮助。
IIb，个体队列研究。
