Supersonic Shear Imaging Elastography in Skeletal Muscles: Relationship Between In Vivo and Synthetic Fiber Angles and Shear Modulus

Lima, Kelly Mônica Marinho e; Rouffaud, Rémi; Grégoire, Jean‐Marc; Pereira, Wagner Coelho de Albuquerque; Oliveira, Líliam Fernandes de

doi:10.1002/jum.14664

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…By contrast, one recent study reported reductions in shear elastic modulus (estimated from the ultrasound wave velocity measured in relaxed muscle) in hamstring muscles (35). However, it is unclear whether static elastic modulus measurements obtained at a single (static) muscle length reveal information relating to muscle stiffness measured during tissue lengthening (i.e., whether modulus measured in kPa is synonymous with mechanical stiffness measured in N/m) or whether potential changes in muscle isotropy or architectural/structural parameters might influence shear elastic modulus measurements (43).…”

Section: Effects Of Passive (Static) Muscle Stretchingmentioning

confidence: 99%

Adaptations in the passive mechanical properties of skeletal muscle to altered patterns of use

Blazevich

2019

Journal of Applied Physiology

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The aim of this mini-review is to describe the present state of knowledge regarding the effects of chronic changes in the patterns of muscle use (defined as changes lasting >1 wk), including muscle stretching, strengthening, and others, on the passive mechanical properties of healthy human skeletal muscles. Various forms of muscle stretch training and some forms of strength training (especially eccentric training) are known to strongly impact the maximum elongation capacity of muscles in vivo (i.e., maximum joint range of motion), largely by increasing our ability to tolerate higher stretch loads. However, only small effects are observed in the passive stiffness of the muscle-tendon unit (MTU) or the muscle itself, although a reduction in muscle stiffness has been observed in the plantar flexors after both stretching and eccentric exercise interventions. No changes have yet been observed in viscoelastic properties such as the MTU stress-relaxation response, although a minimum of evidence indicates that hysteresis during passive stretch-relaxation cycles may be reduced by muscle stretching training. Importantly, data exist for relatively few muscle groups, and little is known about the effects of age and sex on the adaptive process of passive mechanical properties. Despite the significant research effort afforded to understanding the effects of altered physical activity patterns on the maximum range of motion at some joints, further information is needed before it will be possible to develop targeted physical activity interventions with the aim of evoking specific changes in passive mechanical properties in individuals or in specific muscles and muscle groups.

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Section: Effects Of Passive (Static) Muscle Stretchingmentioning

confidence: 99%

Adaptations in the passive mechanical properties of skeletal muscle to altered patterns of use

Blazevich

2019

Journal of Applied Physiology

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“…The investigation of regional differences along the entire torque–angle curve is an important next step is this area of research. Although recent research has indicated that an increase of fascicles’ pennation angle could attenuate shear wave propagation (i.e., shear modulus decrement), this effect was shown to be small [ 28 , 29 , 30 ]. Importantly, BFlh has been shown to have a smaller fascicles pennation angle proximally [ 20 ].…”

Section: Discussionmentioning

confidence: 99%

Regional Differences in Biceps Femoris Long Head Stiffness during Isometric Knee Flexion

Vaz

Neto

Correia

et al. 2021

JFMK

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This study sought to investigate whether the stiffness of the biceps femoris long head differs between proximal and distal regions during isometric knee flexion at different contraction intensities and muscle lengths. Twelve healthy individuals performed knee flexion isometric contractions at 20% and 60% of maximum voluntary isometric contraction, with the knee flexed at 15 and 45 degrees. Muscle stiffness assessment was performed using ultrasound-based shear wave elastography. Proximal and distal regions of the biceps femoris long head were assessed. Biceps femoris long head muscle showed a greater stiffness (i) in the distal region, (ii) at higher contraction intensity, and (iii) at longer muscle length. The proximal-to-distal stiffness ratio was significantly lower than 1 (i.e., heterogenous) at lower contraction intensity regardless of the muscle length. However, this was not observed at higher contraction intensity. This study is the first to show heterogeneity in the active stiffness of the biceps femoris long head. Given the greater incidence of injury at the proximal region of biceps femoris long head, this study opens new directions for future research. Additionally, the present study results indicate that studies assessing muscle stiffness at one single muscle region should be interpreted with caution.

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Does static stretching change uniformly the quadriceps elasticity in physically actives subjects?

et al. 2022

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Supersonic Shear Imaging Elastography in Skeletal Muscles: Relationship Between In Vivo and Synthetic Fiber Angles and Shear Modulus

Cited by 4 publications

References 26 publications

Adaptations in the passive mechanical properties of skeletal muscle to altered patterns of use

Adaptations in the passive mechanical properties of skeletal muscle to altered patterns of use

Regional Differences in Biceps Femoris Long Head Stiffness during Isometric Knee Flexion

Does static stretching change uniformly the quadriceps elasticity in physically actives subjects?

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