Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Shearing Strain01:20

Shearing Strain

280
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between...
280
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

267
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
267
Hooke's Law01:26

Hooke's Law

389
Hooke's law, a pivotal principle in material science, establishes that the strain a material undergoes is directly proportional to the applied stress, defined by a factor called the modulus of elasticity or Young's modulus.
389

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

How Different Are Training Sessions From Matches? An Exploratory Study Analyzing Resultant Acceleration Distribution Curves of Portuguese Young Adult Male Soccer Players.

Journal of strength and conditioning research·2026
Same author

The Most Demanding Match Periods in Youth Male Soccer: Analysis by Age Groups and Playing Position.

International journal of sports physiology and performance·2026
Same author

Sleep duration, timing, and regularity during school, training, and holiday periods in male adolescent soccer players.

Scientific reports·2026
Same author

Kinematic and Muscle Activation Differences Between High-Performance and Intermediate Tennis Players During the Forehand Drive.

Sensors (Basel, Switzerland)·2026
Same author

Muscle activation and intermuscular coordination adaptations to early strength training during maximal force production.

PloS one·2026
Same author

A Short Maximal Effort Induces Greater Low-Frequency Fatigue than Prolonged Cycling in Highly-Trained Road Cyclists.

International journal of exercise science·2026

Related Experiment Video

Updated: Jul 5, 2025

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations
07:30

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations

Published on: May 1, 2018

15.4K

Changes in passive and active hamstrings shear modulus are not related after a warmup protocol.

Ricardo Pimenta1, José P Correia2, João R Vaz3

  • 1CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Cruz Quebrada Dafundo, Portugal; Research Center of the Polytechnic Institute of Maia (N2i), Maia Polytechnic Institute (IPMAIA),Castêlo da Maia, 4475-690 Maia, Portugal; Futebol Clube Famalicão - Futebol SAD, Department of Rehabilitation and Performance, Famalicão, Portugal.

Journal of Biomechanics
|January 24, 2024
PubMed
Summary

Changes in hamstring passive and active shear modulus after warming up were not correlated. This suggests distinct responses in muscle stiffness during passive stretching versus active contraction post-warmup.

Keywords:
ExerciseLower extremityMusculoskeletal ultrasoundShear modulusShear wave elastography

More Related Videos

Author Spotlight: Integrating Mechanical and Biological Analysis in Tendinopathy Research
04:37

Author Spotlight: Integrating Mechanical and Biological Analysis in Tendinopathy Research

Published on: March 1, 2024

865
In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig
09:41

In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig

Published on: September 3, 2021

3.7K

Related Experiment Videos

Last Updated: Jul 5, 2025

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations
07:30

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations

Published on: May 1, 2018

15.4K
Author Spotlight: Integrating Mechanical and Biological Analysis in Tendinopathy Research
04:37

Author Spotlight: Integrating Mechanical and Biological Analysis in Tendinopathy Research

Published on: March 1, 2024

865
In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig
09:41

In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig

Published on: September 3, 2021

3.7K

Area of Science:

  • Biomechanics
  • Sports Medicine
  • Musculoskeletal Research

Background:

  • Understanding hamstring muscle properties is crucial for injury prevention.
  • Warmup protocols aim to prepare muscles for activity, potentially altering their mechanical characteristics.
  • Shear modulus, measured via elastography, quantifies muscle stiffness and is sensitive to changes in muscle state.

Purpose of the Study:

  • To investigate the relationship between changes in passive and active hamstring shear modulus following a standardized warmup.
  • To determine if warmup-induced alterations in passive muscle stiffness correlate with alterations in active muscle stiffness.

Main Methods:

  • Ultrasound shear wave elastography was used to measure muscle shear modulus.
  • Measurements were taken at rest (passive) and during submaximal isometric contractions (active).
  • Data were collected before and immediately after a standardized warmup protocol in 20 healthy males.

Main Results:

  • Changes in passive hamstring shear modulus after warmup did not correlate with changes in active shear modulus.
  • The study found no significant association between the alterations in passive and active muscle stiffness.

Conclusions:

  • The findings suggest that passive and active hamstring shear modulus respond independently to a standardized warmup.
  • This implies that a warmup may not uniformly affect all aspects of hamstring muscle mechanical properties.
  • Further research could explore different warmup protocols or populations to understand these differential responses.