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Does Lift-Off Occur During Deep Squat?

[+] Author Affiliations
Ali Abbasi, Mohamed Samir Hefzy

The University of Toledo, Toledo, OH

Paper No. SBC2007-176077, pp. 637-638; 2 pages
  • ASME 2007 Summer Bioengineering Conference
  • ASME 2007 Summer Bioengineering Conference
  • Keystone, Colorado, USA, June 20–24, 2007
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-4798-5
  • Copyright © 2007 by ASME


Kneeling, deep squatting, crouching, and gardening represent activities that require flexing the knee maximally. Yet, the present-state-of-the-art of knee mechanics does not provide an accurate understanding of how this joint functions in deep flexion in normal individuals as indicated by Kurosaka, et al. [1]. This limited understanding of the complex 3-D dynamic tibio-femoral and patello-femoral motions past 130° of knee flexion hinders the development of a prosthesis that would provide for full flexion of the knee. One of the questions that is being presently debated is whether lift-off occurs during deep squat or not [2, 3]. The purpose of this paper is to provide an answer to this question by determining the kinematics of the knee while it is maximally flexed, past 155 degrees of flexion.

Copyright © 2007 by ASME
Topics: Kinematics , Prostheses , Knee



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