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Characterization of muscle belly elastic properties during passive stretching using transient elastography
- Source :
- Journal of Biomechanics, Journal of Biomechanics, Elsevier, 2008, 41 (10), pp.2305-2311. ⟨10.1016/j.jbiomech.2008.03.033⟩
- Publication Year :
- 2007
-
Abstract
- Passive muscle stretching can be used in vivo to assess the viscoelastic properties of the entire musculo-articular complex, but does not allow the specific determination of the muscle or tendon viscoelasticity. In this respect, the local muscle hardness (LMH) of the gastrocnemius medialis (GM) belly was measured during a passive ankle stretching of 10 subjects using transient elastography. A Biodex isokinetic dynamometer was used to stretch ankle plantar flexors, to measure ankle angle, and the passive torque developed by the ankle joint in resistance to the stretch. Results show that the LMH increased during the stretching protocol, with an averaged ratio between maximal LMH and minimal LMH of 2.6270.46. Furthermore, LMH–passive torque relationships were nicely fitted using a linear model with mean correlation coefficients (R 2 ) of 0.82870.099. A good reproducibility was found for the maximal passive torque (ICC ¼ 0.976, SEM ¼ 2.9 N m, CV ¼ 5.5%) and the y-intercept of the LMH–passive torque relationship (ICC ¼ 0.893, SEM ¼ 105 Pa, CV ¼ 7.8%). However, the reproducibility was low for the slope of this relationship (ICC ¼ 0.631, SEM ¼ 10.35 m � 2 ,C V¼ 60.4%). The y-intercept of the LMH–passive torque relationship was not significantly changed after 10 min of static stretching. This result confirms the finding of a previous study indicating that changes in passive torque following static stretching could be explained by an acute increase in muscle length without any changes in musculo-articular intrinsic mechanical properties. r 2008 Elsevier Ltd. All rights reserved.
- Subjects :
- Adult
Male
Muscle stiffness
Materials science
Transient elastography
Musculoskeletal Physiological Phenomena
Biomedical Engineering
Biophysics
Passive stretching
[SPI.MAT]Engineering Sciences [physics]/Materials
Static stretching
Passive torque
03 medical and health sciences
0302 clinical medicine
Muscle Stretching Exercises
medicine
Humans
Orthopedics and Sports Medicine
Muscle, Skeletal
Reproducibility
Electromyography
Rehabilitation
Reproducibility of Results
Muscle belly
030229 sport sciences
Anatomy
[SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]
Elasticity
Tendon
Biomechanical Phenomena
Exercise Therapy
medicine.anatomical_structure
Torque
Elasticity Imaging Techniques
Ankle
030217 neurology & neurosurgery
Algorithms
Biomedical engineering
Muscle Contraction
Subjects
Details
- ISSN :
- 00219290
- Volume :
- 41
- Issue :
- 10
- Database :
- OpenAIRE
- Journal :
- Journal of biomechanics
- Accession number :
- edsair.doi.dedup.....5f778803eff45aa4dc20b29b8848502e