JRM Vol.35 No.3 pp. 762-770
doi: 10.20965/jrm.2023.p0762


Musculoskeletal Model Capable of Reproducing Lumbar Extension Motion Strategy Based on the Equilibrium Point Hypothesis

Masahiro Sato*, Michihiro Yoshida* ORCID Icon, Takashi Kusaka** ORCID Icon, Yusuke Suzuki*, and Takayuki Tanaka**,† ORCID Icon

*Graduate School of Information Science and Technology, Hokkaido University
Kita 14, Nishi 9, Kita-ku, Sapporo, Hokkaido 060-0814, Japan

**Faculty of Information Science and Technology, Hokkaido University
Kita 14, Nishi 9, Kita-ku, Sapporo, Hokkaido 060-0814, Japan

Corresponding author

January 10, 2023
April 28, 2023
June 20, 2023
human modeling, joint stiffness, equilibrium-point hypothesis, motion strategy

We considered the change in joint stiffness as a motion strategy in human lumbar extension movement. We developed a musculoskeletal model that can reproduce this motion strategy and attempted to clarify the individual characteristics and differences in motion strategy. This model reproduces changes in lumbar joint stiffness during movement by appropriately adjusting parameters such that they represent the motion strategy. Using this model, we identified parameters in lumbar extension exercises for six participants with differences in lumbar joint stiffness and examined changes in lumbar joint stiffness and motion strategies. The results showed that participants with similar changes in joint stiffness had commonalities in their motion strategies.

Link model joint angle

Link model joint angle

Cite this article as:
M. Sato, M. Yoshida, T. Kusaka, Y. Suzuki, and T. Tanaka, “Musculoskeletal Model Capable of Reproducing Lumbar Extension Motion Strategy Based on the Equilibrium Point Hypothesis,” J. Robot. Mechatron., Vol.35 No.3, pp. 762-770, 2023.
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