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Updated: Jun 23, 2026

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
Published on: April 11, 2018
Research on standing long jump problem based on equivalent model of four rigid bodies of human body
Xiaoqiang Qian1,2, Ying Wang3
1School of Physical Education, Chengdu Sport University, Chengdu, China.
Abstract:
Standing long jump is a key physical fitness test included in China's high school entrance examination and a basic movement for most sports. Based on jumping kinematic and dynamic principles, this study builds a four-rigid-body model seeking the optimal takeoff joint angles for maximum jump distance. Using the genetic neural network algorithm, the optimal initial angles of foot, ankle, knee and hip joints are 6.3°, 68.3°, 68.8° and 93.03°, respectively. Sensitivity analysis shows that ±5% fluctuation of initial angles leads to jump distance changes of 0.07%, 0.25%, 2.46% and 0.91%. It verifies the established model's good stability and robustness.
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