Role of arms in somersaulting from compliant surfaces: A simulation study of springboard standing dives

Kuangyou B. Cheng, Mont Hubbard

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)


The role of arms in compliant-surface jumping for maximizing backward somersault rotations is studied using multi-segment models and is applied to springboard diving. The surface (springboard) is modeled by a rigid bar with a rotational spring with a hinged end and point mass at the tip. Planar four- and five-segment human models are used (with the fifth segment representing the arms) and are driven by torque actuators at the ankle, knee, hip, and shoulder. Each joint torque is the product of maximum isometric torque and three variable functions depending on instantaneous joint angle, angular velocity, and activation level, respectively. Movement simulation starts from a balanced initial posture and ends at jump takeoff. The objective is to find joint torque activation patterns during board contact so that the number of backward rotations in flight is maximized. Kinematic differences in jumps with and without arms are mainly in smaller takeoff vertical velocity and more flexed knee and hip in the former. In both jumps, joint torque/activations are similar in their minor flexion-full extension patterns. Maximum hip torque is larger with arms but maximum knee torque is larger without arms. Except at the knee, more joint work can be done with arm swing. Total angular momentum is increased considerably by arm motion because of its remote contribution. Consequently segment remote contributions to total angular momentum are much larger in jumping with arms. Shoulder strength helps generate angular momentum only to a certain limit. If more work is used to generate horizontal velocity away from the board, the amount of total angular momentum is reduced.

頁(從 - 到)80-95
期刊Human Movement Science
出版狀態Published - 2008 2月

All Science Journal Classification (ASJC) codes

  • 實驗與認知心理學
  • 生物物理學
  • 骨科和運動醫學


深入研究「Role of arms in somersaulting from compliant surfaces: A simulation study of springboard standing dives」主題。共同形成了獨特的指紋。