Volume 87, Number 5, September 2009
|Number of page(s)||4|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||22 September 2009|
Least-action principle in gait
Center for Scientific Research, Guangzhou Institute of Physical Education - Guangzhou 510500, China
2 International School, Jinan University - Guangzhou 510632, China
3 Bioengineering Department, Beijing University of Aeronautics and Astronautics - Beijing 100191, China
4 College of Foreign Languages, Jinan University - Guangzhou 510632, China
Corresponding author: firstname.lastname@example.org
Accepted: 24 August 2009
We apply the laws of human gait vertical ground reaction force and discover the existence of the phenomenon of least-action principle in gait. Using a capacitive mat transducer system, we obtain the variations of human gait vertical ground reaction force and establish a structure equation for the resultant of such a force. Defining the deviation of vertical force as an action function, we observe from our gait optimization analysis the least-action principle at half of the stride time. We develop an evaluation index of mechanical-energy consumption based upon the least-action principle in gait. We conclude that these observations can be employed to enhance the accountability of gait evaluation.
PACS: 87.85.G – Biomechanics / 87.85.gj – Movement and locomotion / 87.55.de – Optimization
© EPLA, 2009
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