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Muscle and tendon stiffness assessment using the alpha method and ultrafast ultrasound
- Source :
- European Journal of Applied Physiology, European Journal of Applied Physiology, Springer Verlag, 2015, 115 (7), pp.1393--1400, European Journal of Applied Physiology, Springer Verlag, 2015, 115 (7), pp.1393-1400. ⟨10.1007/s00421-015-3112-1⟩, European Journal of Applied Physiology, 2015, 115 (7), pp.1393--1400. ⟨10.1007/s00421-015-3112-1⟩
- Publication Year :
- 2015
- Publisher :
- HAL CCSD, 2015.
-
Abstract
- The alpha method enables the dissociation of the passive (i.e., tendinous tissues) and active (i.e., fascicles) part of muscle–tendon stiffness. It is based on two main assumptions (i.e., a constant tendon stiffness and a muscle stiffness proportional to the torque produced), which have not been approved in vivo. The purpose of this study was to validate these two assumptions using ultrafast ultrasound, and to compare fascicle and tendon stiffness as determined by both methods. Ten healthy males performed a fast-stretch experiment on the ankle plantar flexors. The mathematical model of the alpha method allowed to estimate the stiffness of muscle and tendinous tissues on the basis of the assumptions associated to the behaviors of muscle fascicles and tendinous tissues. Muscle and tendon stiffness of the gastrocnemius medialis were also calculated from ultrafast ultrasound measurements. Muscle stiffness measured by the ultrasound method increased from 217 ± 83 to 720 ± 265 N/mm with an increasing level of force (from 30 to 90 % MVC). Tendinous stiffness measured by the ultrasound method remained constant across the force level (P
- Subjects :
- Male
passive parts
triceps surae aponeurosis
Physiology
[SDV]Life Sciences [q-bio]
in-vivo
electromechanical delay
Tendons
0302 clinical medicine
quick-release method
Orthopedics and Sports Medicine
Range of Motion, Articular
ComputingMilieux_MISCELLANEOUS
Achilles tendon
Plantar flexors
Ultrasound
Stiffness
General Medicine
Anatomy
Fascicle
musculoskeletal system
Tendon
medicine.anatomical_structure
[SDV.IB]Life Sciences [q-bio]/Bioengineering
medicine.symptom
Range of motion
Muscle Contraction
Adult
musculoskeletal diseases
load-displacement properties
Materials science
animal structures
Fascicles
mechanical-properties
Young Adult
03 medical and health sciences
Ankle joint
Physiology (medical)
medicine
Gastrocnemius
Humans
Muscle, Skeletal
achilles-tendon
business.industry
Public Health, Environmental and Occupational Health
technology, industry, and agriculture
030229 sport sciences
frame rate ultrasound
Muscle stiffness
body regions
Torque
Ankle
business
series elastic component
030217 neurology & neurosurgery
Subjects
Details
- Language :
- English
- ISSN :
- 14396319 and 14396327
- Database :
- OpenAIRE
- Journal :
- European Journal of Applied Physiology, European Journal of Applied Physiology, Springer Verlag, 2015, 115 (7), pp.1393--1400, European Journal of Applied Physiology, Springer Verlag, 2015, 115 (7), pp.1393-1400. ⟨10.1007/s00421-015-3112-1⟩, European Journal of Applied Physiology, 2015, 115 (7), pp.1393--1400. ⟨10.1007/s00421-015-3112-1⟩
- Accession number :
- edsair.doi.dedup.....58ddbfb69a84f2a3045b953cecdb6a9d