Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Beams with Symmetric Loadings

Beams with Symmetric Loadings

The moment-area method is an analytical tool used in structural engineering to determine the slope and deflection of beams under various loads. Consider a cantilever with a concentrated load and moment at the free end. The first step is constructing a free-body diagram to calculate the reactions at the fixed end. Next, the bending moment diagram is plotted to visualize how the bending moment varies along the beam's length, focusing on points where the bending moment equals zero.
The M/EI...

Principle of Moments

Principle of Moments

The principle of moments, also known as Varignon's theorem, is a fundamental concept in physics and engineering that describes the equilibrium of a rigid body under the influence of external forces. The principle states that the moment of a force about a point is equal to the sum of the moments of the components of the force about the same point.
The moment is calculated by multiplying the magnitude of the force by the perpendicular distance from the point of application to the point about...

Bearings: Problem Solving

Bearings: Problem Solving

Understanding the calculations and concepts related to double-collar bearings is essential for engineers and designers to optimize the performance of these components in various applications. By analyzing the bearing under different conditions, one can ensure that it can withstand the forces and moments experienced during operation. This knowledge enables better decision-making when designing and selecting bearings for specific purposes and configurations. Consider a double-collar bearing with...

Resultant Moment: Scalar Formulation

Resultant Moment: Scalar Formulation

When multiple forces act on an object in two-dimensional space, the concept of the net moment can be used to understand the tendency of these forces to induce rotational motion about a fixed point. The scalar formulation of the resultant moment is a helpful tool in analyzing the equilibrium of structures subjected to multiple forces.
To determine the resultant moment, the moments caused by all the forces in a system in the x-y plane are considered. Positive moments are typically...

General Case of Eccentric Axial Loading

General Case of Eccentric Axial Loading

Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...

Principle of Moments: Problem Solving

Principle of Moments: Problem Solving

The principle of moments is a fundamental concept in physics and engineering. It refers to the balancing of forces and moments around a point or axis, also known as the pivot. This principle is used in many real-life scenarios, including construction, sports, and daily activities like opening doors and pushing objects.
One such scenario involves a pole placed in a three-dimensional system with a cable attached. When a tension is applied to the cable, the moment about the z-axis passing through...

You might also read

Related Articles

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

Sort by

Same author

Sex-Based Differences in Patient-Reported Outcome Measures Are Not Present Three Months After ACL Reconstruction.

Journal of clinical medicine·2026

Same author

Corrigendum to "Limb and sex-related differences in knee muscle co-contraction exist 3 months after anterior cruciate ligament reconstruction" [J. Electromyogr. and Kines. 66 (2022) 102693].

Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology·2025

Same author

Prolonged quadriceps latency during gait early after anterior cruciate ligament injury predicts radiographic knee osteoarthritis 6-years after anterior cruciate ligament reconstruction.

Clinical biomechanics (Bristol, Avon)·2024

Same author

Unbalanced Medial-to-Lateral Knee Muscle Co-Contractions are Associated with Medial Tibiofemoral Underloading during Gait Three Months after Anterior Cruciate Ligament Reconstruction.

Journal of biomechanics·2024

Same author

The Interplay Between Walking Speed, Economy, and Stability After Stroke.

Journal of neurologic physical therapy : JNPT·2023

Same author

Markerless motion capture: What clinician-scientists need to know right now.

JSAMS plus·2022

Search research articles

Related Experiment Video

Updated: Oct 19, 2025

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty

Published on: May 5, 2023

An Efficient One-Step Moment Balancing Algorithm for Computing Medial and Lateral Knee Compartment Contact Forces.

Kurt Manal¹, Thomas S Buchanan²

¹Department of Kinesiology and Applied Physiology, University of Delaware, 540 S. College Ave, Room 148, Newark, DE 19713; Department of Biomechanics and Movement Science, University of Delaware, Newark, DE 19713; Department of Biomedical Engineering, University of Delaware, Newark, DE 19713.

Journal of Biomechanical Engineering

|September 22, 2021

Summary

A new one-step algorithm efficiently calculates knee contact forces, crucial for understanding knee osteoarthritis (OA) progression. This method offers a simpler alternative to existing two-step approaches for analyzing medial and lateral knee compartment loading during walking.

More Related Videos

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

Published on: August 30, 2016

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Published on: May 8, 2014

Related Experiment Videos

Last Updated: Oct 19, 2025

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty

Published on: May 5, 2023

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

Published on: August 30, 2016

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Published on: May 8, 2014

Area of Science:

Biomechanics
Orthopedics
Knee Osteoarthritis Research

Background:

The knee adduction moment is a key indicator of knee osteoarthritis (OA) progression.
Accurately partitioning bone-on-bone forces in medial and lateral knee compartments is vital for understanding OA.
Current methods for calculating these forces can be complex.

Purpose of the Study:

To present an efficient one-step moment balancing algorithm for determining musculotendon forces.
To link sagittal and frontal planes in the calculation of knee contact forces.
To compare the novel one-step method with a traditional two-step approach for computing medial and lateral knee contact forces.

Main Methods:

Developed a one-step moment balancing algorithm incorporating a penalty function for lateral compartment force limitation.
Applied the algorithm to compute medial and lateral knee contact forces in 10 subjects during walking.
Compared the results from the one-step method against a well-established two-step frontal moment balancing approach.

Main Results:

The one-step and two-step methods yielded similar ensemble-averaged knee contact force profiles.
Average peak differences in magnitude and timing between the two methods were small.
A statistically significant but small increase in peak medial contact force was observed with the one-step method in early stance.

Conclusions:

The one-step moment balancing algorithm is an efficient and viable alternative for computing knee contact forces.
This method simplifies the analysis of medial and lateral knee compartment loading.
The findings suggest the one-step method can be used in place of two-step frontal plane moment balancing without significantly altering data interpretation for knee OA research.