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Analysis of the Loaded Gait Subjected to the Trunk Flexion Change

Authors: Ji-il Park, Donghan Koo, Hyungtae Seo, Jihyuk Park, Heewon Park, Sukyung Park, Kyung-Soo Kim, and Soohyun Kim


In the paper, the energetic features of the loaded gait are newly analyzed depending on the trunk flexion change. To investigate the loaded gait, walking experiments are performed for five subjects and, the ground reaction forces and kinematic data are measured. Based on these information, we compute the impulse, momentum and mechanical works done on the center of body mass, through the trunk flexion change. As a result, it is shown that the trunk flexion change does not affect the impulses and momentums during the step-to-step transition as well. However, the direction of the pre-collision momentum does change depending on the trunk flexion change, which is degenerated just after (or during) the collision period.

Keywords: Loaded gait, collision, impulse, gravity, heel strike, push-off, gait analysis.

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[1] Yeom, Jin, "Finite Collision Model for the Double Support Phase of Human Walking", M.S. Thesis, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea, 2010.
[2] Yeom, Jin, "A gravitational impulse model predicts collision impulse and mechanical work during a step-to-step transition", Journal of Biomechanics, vol. 44, pp. 59-67, 2011.
[3] T. McGeer, "Passive dynamic walking," The International Journal of Robotics Research, vol. 9, pp. 62, 1990.
[4] M. Garcia, A. Chatterjee, A. Ruina, and M. Coleman, "The simplest walking model: Stability, complexity, and scaling," ASME Journal of Biomechanical Engineering, 1998.
[5] A. D. Kuo, "Energetics of actively powered locomotion using the simplest walking model," Journal of Biomechanical Engineering, vol. 124, pp. 113, 2002.
[6] J. M. Donelan, R. Kram, and A. D. Kuo, "Mechanical work for step-to-step transitions is a major determinant of the metabolic cost of human walking," Journal of Experimental Biology, vol. 205, pp. 3717-3727, 2002.
[7] A. D. Kuo, J. M. Donelan, and A. Ruina, "Energetic consequences of walking like an inverted pendulum: step-to-step transitions," Exerc Sport Sci Rev, vol. 33, pp. 88-97, 2005.
[8] P. G. Adamczyk and A. D. Kuo, "Redirection of center-of-mass velocity during the step-to-step transition of human walking," J Exp Biol, vol. 212, pp. 2668-78, 2009.
[9] F. J. Diedrich and W. H. Warren, Jr., "Why change gaits? Dynamics of the walk-run transition," J Exp Psychol Hum Percept Perform, vol. 21, pp. 183-202, 1995.
[10] L. Li and J. Hamill, "Characteristics of the vertical ground reaction force component prior to gait transition," Res Q Exerc Sport, vol. 73, pp. 229-37, 2002.
[11] S. J. Cuccurullo, editor, Physical Medicine and Rehabilitat