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Related Concept Videos

Three-Dimensional Force System01:30

Three-Dimensional Force System

In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
Machines: Problem Solving II01:30

Machines: Problem Solving II

Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. Consider a lifting tong carrying a 100 kg load. It comprises movable sections DAF and CBG linked together with member AB.
Relation Between the Distributed Load and Shear01:23

Relation Between the Distributed Load and Shear

Understanding the relationship between the distributed load and shear force in structural analysis is crucial for analyzing beams subjected to various loading conditions. Consider the case of a beam experiencing a distributed load, two concentrated loads, and a couple moment.
Stress: General Loading Conditions01:15

Stress: General Loading Conditions

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.
Impact Loading01:19

Impact Loading

Impact loading occurs when a moving object collides with a stationary structure, such as a rod with a uniform cross-sectional area fixed at one end. Under these conditions, the rod absorbs the kinetic energy from the striking object, leading to deformation and subsequent stress development. As the rod returns to its original position and reaches maximum stress, the absorbed energy, initially manifested as kinetic energy, transforms entirely into strain energy.
In cases of elastic deformation,...

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Related Experiment Video

Updated: Jun 14, 2026

Using Gold-standard Gait Analysis Methods to Assess Experience Effects on Lower-limb Mechanics During Moderate High-heeled Jogging and Running
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THE EFFECTS OF ROCKER SOLE ON RUNNING KINEMATICS AND WEIGHT-BEARING COMPUTED TOMOGRAPHY: A 3D ANALYSIS STUDY.

Rafael Barban Sposeto1, Alexandre Leme Godoy-Santos1, Albert DaCosta2

  • 1Universidade de Sao Paulo (USP), Departamento de Ortopedia e Traumatologia (IOT), Divisao de Pe e Tornozelo, Sao Paulo, SP, Brazil.

Acta Ortopedica Brasileira
|December 15, 2025
PubMed
Summary

Rocker sole footwear aids forefoot conditions by altering biomechanics. This study uses weight-bearing computed tomography (WBCT) to explore how this footwear changes foot anatomy, explaining its clinical benefits.

Keywords:
CT Scan, X RayForefoot, HumanKinematicsMetatarsalgia

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Area of Science:

  • Biomechanics
  • Orthopedic footwear
  • Medical imaging

Background:

  • Rocker sole footwear is clinically effective for forefoot disorders like diabetic ulcers and metatarsalgia.
  • Existing pressure analysis studies explain the kinetic benefits but lack data on anatomical changes.
  • Understanding rocker sole footwear's impact on foot mobility and anatomy is crucial.

Purpose of the Study:

  • To propose and validate a weight-bearing computed tomography (WBCT) methodology for assessing forefoot anatomical alterations.
  • To investigate the morphological changes in the forefoot induced by rocker sole footwear.
  • To correlate anatomical changes with established kinetic and kinematic effects of rocker sole footwear.

Main Methods:

  • Utilizing weight-bearing computed tomography (WBCT) to capture detailed anatomical data of the forefoot.
  • Developing a methodology to evaluate morphological changes in the foot's structure.
  • Performing biomechanical analysis to link anatomical findings with functional outcomes.

Main Results:

  • The study establishes WBCT as a viable method for evaluating forefoot anatomy in the context of rocker sole footwear.
  • Identified specific morphological changes in the forefoot associated with the use of rocker sole footwear.
  • Provided a biomechanical basis for the clinically observed effects of rocker sole footwear.

Conclusions:

  • Weight-bearing computed tomography (WBCT) offers novel insights into the anatomical adaptations caused by rocker sole footwear.
  • This research bridges the gap between clinical observations and the underlying biomechanical mechanisms.
  • The findings enhance the understanding of how rocker sole footwear influences forefoot structure and function.