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

Principle of Virtual Work: Problem Solving01:13

Principle of Virtual Work: Problem Solving

1.4K
The principle of virtual work is an essential concept in the field of mechanics and engineering. This is used to solve problems related to the equilibrium of a structure or system. It is based on the assumption that if a system is in equilibrium, the work done by all the forces during a virtual displacement is zero. This principle is applied by considering virtual displacements of the system and the corresponding work done by internal and external forces.
To apply the principle of virtual work,...
1.4K
Work of a Couple Moment01:12

Work of a Couple Moment

902
Mechanical engineering involves the study of motion, energy, and force, and is concerned with designing, manufacturing, and maintaining mechanical systems. One important concept in this field is the couple moment, produced by two equal and opposite forces acting at two points in a rigid body separated by a certain distance.
When the rigid body undergoes a differential displacement due to a couple, its motion can be divided into two parts: equal translation of the two points to their final...
902
Work01:14

Work

606
Work is a fundamental concept of mechanical engineering and has many applications. Understanding how work is calculated and the different types of work can help us better understand physical processes and provide insights into complex problems.
Work is defined as the result of a force acting on an object, causing it to move along the line of action of force. It is also defined as the process of transferring energy through the application of force on an object, resulting in its displacement.
606
Work01:22

Work

29.5K
Work is done when energy is transferred from one object to another. In other words, work is when a force acts on something that undergoes a displacement from one position to another. Forces can vary as a function of position, and displacements can be along various paths between two points. The increment of work (dW) done by a force acting through an infinitesimal displacement can be defined as the dot product of force () and displacement () vectors.
The dot product can be expressed in terms of...
29.5K

You might also read

Related Articles

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

Sort by
Same author

Nonelongating rod placement after osteosynthesis of congenital pseudarthrosis of the tibia: should an elongating rod have been installed?

Journal of pediatric orthopedics. Part B·2026
Same author

Comparison of bone age between both limbs in patients with congenital hemihyperplasia or hemihypoplasia: A retrospective study.

Journal of children's orthopaedics·2026
Same author

Two-year structural skeletal outcomes of burosumab therapy in pediatric X-linked hypophosphatemia: A radiographic cohort study.

Journal of children's orthopaedics·2025
Same author

Hip Displacement in Spinal Muscular Atrophy in the Early Disease-Modifying Therapy Era: Association With Hip Pain and Timing of Therapy Initiation.

Journal of pediatric orthopedics·2025
Same author

Reply to Letter to the Editor Regarding the Article: "Treatment Outcomes at Skeletal Maturity After Physeal-Sparing Procedures for Early-Onset Slipped Capital Femoral Epiphysis Using a Long Screw With a Short-Threaded Tip".

Journal of pediatric orthopedics·2025
Same author

Vitamin D Deficiency and Secondary Hyperparathyroidism as Potential Causes of Idiopathic Knee Angular Deformity: A Prospective Cross-Sectional Comparative Study.

Journal of pediatric orthopedics·2025

Related Experiment Video

Updated: Nov 27, 2025

A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers
07:24

A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers

Published on: April 21, 2017

12.8K

Inter-limb difference of mechanical work in limb length discrepancy.

Mi Hyun Song1, Hae-Ryong Song1, Woo-Sub Kim2

  • 1Department of Orthopedic Surgery and Institute for Rare Diseases, Korea University Medical Center, Guro Hospital, Seoul, Republic of Korea.

Gait & Posture
|December 7, 2020
PubMed
Summary

Limb length discrepancy (LLD) causes significant differences in mechanical work between limbs. Adaptation strategies vary with LLD severity, impacting shorter and longer limbs differently, especially with increasing discrepancy.

Keywords:
GaitLimb length discrepancyMechanical work

More Related Videos

Compensatory Limb Use and Behavioral Assessment of Motor Skill Learning Following Sensorimotor Cortex Injury in a Mouse Model of Ischemic Stroke
08:01

Compensatory Limb Use and Behavioral Assessment of Motor Skill Learning Following Sensorimotor Cortex Injury in a Mouse Model of Ischemic Stroke

Published on: July 10, 2014

11.8K
Author Spotlight: Using the MouseWalker to Quantify Locomotor Dysfunction in a Mouse Model of Spinal Cord Injury
07:28

Author Spotlight: Using the MouseWalker to Quantify Locomotor Dysfunction in a Mouse Model of Spinal Cord Injury

Published on: March 24, 2023

3.8K

Related Experiment Videos

Last Updated: Nov 27, 2025

A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers
07:24

A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers

Published on: April 21, 2017

12.8K
Compensatory Limb Use and Behavioral Assessment of Motor Skill Learning Following Sensorimotor Cortex Injury in a Mouse Model of Ischemic Stroke
08:01

Compensatory Limb Use and Behavioral Assessment of Motor Skill Learning Following Sensorimotor Cortex Injury in a Mouse Model of Ischemic Stroke

Published on: July 10, 2014

11.8K
Author Spotlight: Using the MouseWalker to Quantify Locomotor Dysfunction in a Mouse Model of Spinal Cord Injury
07:28

Author Spotlight: Using the MouseWalker to Quantify Locomotor Dysfunction in a Mouse Model of Spinal Cord Injury

Published on: March 24, 2023

3.8K

Area of Science:

  • Biomechanics
  • Orthopedics
  • Human Movement Science

Background:

  • Limb length discrepancy (LLD) is prevalent and linked to musculoskeletal issues.
  • Adaptation strategies, complication risks, and LLD magnitude relationships remain unclear.
  • Limited research exists on inter-limb mechanical work differences in LLD.

Purpose of the Study:

  • To investigate inter-limb mechanical work differences in LLD.
  • To examine the relationship between LLD magnitude and mechanical work in each lower limb.

Main Methods:

  • 3D motion analysis of 37 participants with LLD.
  • Calculated joint work and individual limb method (ILM) work.
  • Compared mechanical work between longer and shorter limbs; analyzed LLD magnitude correlations.

Main Results:

  • Significant inter-limb differences in mechanical work were observed.
  • Shorter limbs showed negative correlations with positive/negative ILM work.
  • Small group (SG) shorter limbs performed more positive ILM work; Large group (LG) longer limbs performed more negative ILM work.

Conclusions:

  • LLD results in inter-limb mechanical work differences and varied adaptation strategies based on severity.
  • Shorter limb's ILM work decreases as LLD increases.
  • Future LLD research should incorporate mechanical work to inform prevention and treatment.