The indirect measurement of biomechanical forces in the moving human body

Inexpensive experimental techniques now exist for indirectly measuring forces within the moving human body. These techniques involve nontrivial applications of basic physical principles, have practical uses, and are appropriate for undergraduate experimentation. A two-dimensional video motion analys...

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Bibliographic Details
Published in:American journal of physics 2006-02, Vol.74 (2), p.102-108
Main Authors: Cluss, M, Laws, K, Martin, N, Nowicki, T. S
Format: Article
Language:English
Subjects:
Biomechanik
Design of experiments
Kinetics
Kraft (Phys)
Kraftaufzeichnungsgerät
Measurement techniques
Mechanik
Physics
Physik
Videoanalyse
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Summary:Inexpensive experimental techniques now exist for indirectly measuring forces within the moving human body. These techniques involve nontrivial applications of basic physical principles, have practical uses, and are appropriate for undergraduate experimentation. A two-dimensional video motion analysis is used to find the accelerations of various parts of the body, and anatomical geometry is used to determine specific biomechanical forces and torques. The simple movement of a dancer landing from a vertical jump is analyzed through the use of a theoretical model of the leg to find the forces in the tendons attached to the knee. It is shown that these forces can be sufficiently large to lead to injury if jumps are performed repetitively.
ISSN:0002-9505
1943-2909
DOI:10.1119/1.2149868