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

Eccentric Loading01:16

Eccentric Loading

1.2K
Eccentric loading is a crucial concept in the study of structural engineering and mechanics, particularly when analyzing the stability and stress distribution in columns. Unlike centric loading, where the force is applied along the centroidal axis, causing uniform compression, eccentric loading occurs when a force is applied off-center. This off-center application introduces not only direct compressive stress but also bending stress, significantly influencing the column's behavior under...
1.2K
Muscles that Move the Leg01:23

Muscles that Move the Leg

6.9K
The movement of the legs is facilitated by numerous muscles located within the anterior, medial, and posterior compartments of the thigh.
Anterior Compartment
The quadriceps femoris, the most visible muscle of the anterior compartment, is integral for leg extension and thigh flexion. It is formed by merging four distinct muscles — the vastus lateralis, vastus medialis, vastus intermedius, and rectus femoris. The quadriceps tendon, a shared tendon of the four quadriceps muscles, is affixed...
6.9K
Assessing Blood pressure in the Leg01:11

Assessing Blood pressure in the Leg

16.7K
Proper measurement of leg blood pressure is a critical skill for healthcare providers, ensuring precise and reliable readings. When performed correctly, this procedure informs patient care and enhances the efficacy of interventions. The following text outlines step-by-step guidelines to measure blood pressure in the leg, providing clarity and ease of understanding for practitioners.
Preparation:
16.7K
Rolling Resistance: Problem Solving01:17

Rolling Resistance: Problem Solving

943
Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
943
Stress: General Loading Conditions01:15

Stress: General Loading Conditions

721
To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
721
Rolling Resistance01:21

Rolling Resistance

767
When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down due to...
767

You might also read

Related Articles

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

Sort by
Same author

Mild Traumatic Brain Injury and Subsequent Musculoskeletal Injury in US Service Members.

JAMA network open·2026
Same author

The menstrual cycle through the lens of a wearable device: insights into physiology, sleep, and cycle variability.

NPJ digital medicine·2026
Same author

BMI and Varus Malalignment Compound to Define a High-Risk Phenotype for Compartment-Specific Knee Osteoarthritis Progression.

medRxiv : the preprint server for health sciences·2026
Same author

Smartphone video-based knee extension moments during chair rise relate to MRI measures of muscle function.

medRxiv : the preprint server for health sciences·2026
Same author

Adaptations in biceps femoris long-head muscle-tendon mechanics during the Nordic hamstring exercise in response to 9 weeks of training.

Journal of sport and health science·2026
Same author

Retraining Gastrocnemius Muscle Coordination Reduces Late-Stance Knee Contact Force in Individuals With Knee Osteoarthritis.

IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society·2026
Same journal

Shear wave velocity of biceps femoris and medial gastrocnemius in different positions and intensities: a cross-sectional study in healthy young males.

Journal of biomechanics·2026
Same journal

Gait event detection using hybrid EMG/IMU systems: effect of SENIAM-constrained sensor placement on lower limb segments.

Journal of biomechanics·2026
Same journal

Relationship between knee adduction moment and knee contact forces during walking and running with modified foot progression angles.

Journal of biomechanics·2026
Same journal

Scaling contact force parameters across body size, limb count, and number of contact spheres.

Journal of biomechanics·2026
Same journal

The extrapolated body center of mass predicts subsequent foot placement choice during dynamic single-leg landings.

Journal of biomechanics·2026
Same journal

Lateral reactive stepping responses differ between individuals with and without transfemoral amputation.

Journal of biomechanics·2026
See all related articles

Related Experiment Video

Updated: Apr 16, 2026

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running
08:26

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running

Published on: July 17, 2020

6.6K

Running with a load increases leg stiffness.

Amy Silder1, Thor Besier2, Scott L Delp3

  • 1Departments of Bioengineering, Stanford University, United States.

Journal of Biomechanics
|March 3, 2015
PubMed
Summary
This summary is machine-generated.

Running with added load increases leg stiffness by altering mechanics. Subjects adopted a more crouched posture, increasing ground reaction forces and contact time to accommodate the extra weight.

Keywords:
Joint kinematicsLeg stiffnessMotion analysisSpring-mass model

More Related Videos

Using Gold-standard Gait Analysis Methods to Assess Experience Effects on Lower-limb Mechanics During Moderate High-heeled Jogging and Running
06:35

Using Gold-standard Gait Analysis Methods to Assess Experience Effects on Lower-limb Mechanics During Moderate High-heeled Jogging and Running

Published on: September 14, 2017

9.7K
Influence of Step-Width Manipulation on Running Biomechanics
06:53

Influence of Step-Width Manipulation on Running Biomechanics

Published on: February 28, 2025

1.1K

Related Experiment Videos

Last Updated: Apr 16, 2026

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running
08:26

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running

Published on: July 17, 2020

6.6K
Using Gold-standard Gait Analysis Methods to Assess Experience Effects on Lower-limb Mechanics During Moderate High-heeled Jogging and Running
06:35

Using Gold-standard Gait Analysis Methods to Assess Experience Effects on Lower-limb Mechanics During Moderate High-heeled Jogging and Running

Published on: September 14, 2017

9.7K
Influence of Step-Width Manipulation on Running Biomechanics
06:53

Influence of Step-Width Manipulation on Running Biomechanics

Published on: February 28, 2025

1.1K

Area of Science:

  • Biomechanics
  • Human Movement Science
  • Sports Science

Background:

  • Spring-mass models are established for analyzing running mechanics.
  • The impact of carrying external loads on leg stiffness remains under-investigated.

Purpose of the Study:

  • To investigate how carrying external loads affects running mechanics.
  • To test the hypothesis that increased load elevates leg stiffness.

Main Methods:

  • Twenty-seven subjects ran on a force treadmill with varying load percentages (0%, 10%, 20%, 30% body weight).
  • Musculoskeletal modeling estimated joint angles and leg length.
  • Dimensionless leg stiffness was calculated from ground reaction forces and changes in leg length.

Main Results:

  • Dimensionless leg stiffness significantly increased with added load.
  • This increase was driven by higher peak vertical ground reaction forces and reduced changes in stance leg length.
  • Running with load resulted in longer ground contact times and increased joint flexion (hip, knee, ankle).

Conclusions:

  • Carrying external loads enhances leg stiffness during running.
  • Subjects adopt a more crouched running posture to manage added loads.
  • Altered biomechanics, including increased joint flexion and ground reaction forces, are key adaptations to load carriage.