Related Experiment Video
Updated: Mar 2, 2026
08:26
Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running
Published on: July 17, 2020
6.5K
Quantitative assessment of trunk deformation during running
Shoma Kudo1, Masahiro Fujimoto1, Tadao Isaka1
1College of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan.
Journal of Biomechanics
|May 18, 2017
Summary
The human trunk significantly deforms during dynamic movements like running. This study quantifies trunk deformation, providing insights for biomechanical modeling.
Area of Science:
- Biomechanics
- Human Movement Analysis
- Kinesiology
Background:
- The trunk's multi-segmental structure, including cervical, thoracic, and lumbar spines, enables flexible deformation during dynamic activities.
- Understanding trunk deformation is crucial for accurately modeling complex human movements.
Purpose of the Study:
- To quantitatively assess trunk deformation during dynamic movement, specifically running at various speeds.
- To establish measures for translational and angular trunk deformation.
Main Methods:
- Ten male subjects ran at speeds of 8, 10, 12, and 14 km/h.
- 3D kinematic data was captured using a motion system with 40 reflective markers on the trunk.
- Coefficients of variation (CV) and standard deviations (SD) of geometric measures were calculated.
Main Results:
- Significant translational and angular trunk deformations were observed, with CV up to 14% and SD up to 78°.
- Deformation varied position-specifically across the trunk during running.
Conclusions:
- The trunk exhibits substantial position-specific deformation during dynamic activities like running.
- These quantitative findings are valuable for developing optimal trunk segment models for biomechanical analysis.
Related Concept Videos
01:11Deformation of Member under Multiple Loadings
519
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
519
01:27Measurements of Strain
2.7K
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
2.7K
01:15Deformation of a Beam under Transverse Loading
825
Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
The insights from the bending moment diagram extend to...
825
01:20Normal Strain under Axial Loading
1.4K
Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
1.4K