A mechanism for balancing the human body on the hips

Richard Malcolm Aspden, Kate Rudman, Judith Rowena Meakin

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A mechanism for the postural balance of the human torso over the hip joints is reported that does not appear to have been fully recognised. The centre of gravity of the torso is usually considered poised above the hips. This is in a state of unstable equilibrium. Here, we propose that body weight acting through the sacrum is counter-balanced by tension in the ilio-femoral ligament; the hips acting as the fulcrum. This places the torso in stable equilibrium and means that balance may be maintained with minimal muscular forces. The joint reaction force due to this mechanism in a two-legged stance is then of the order of the body-weight on each hip. An implication is that capsular ligaments are important and consideration should be given to retaining or restoring them as much as possible in hip arthroplasty. (c) 2005 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)1757-1759
Number of pages2
JournalJournal of Biomechanics
Volume39
Issue number9
Early online date21 Jun 2005
DOIs
Publication statusPublished - 2006

Keywords

  • hip
  • balance
  • loading
  • stability
  • equilibrium
  • forces

Cite this

A mechanism for balancing the human body on the hips. / Aspden, Richard Malcolm; Rudman, Kate; Meakin, Judith Rowena.

In: Journal of Biomechanics, Vol. 39, No. 9, 2006, p. 1757-1759.

Research output: Contribution to journalArticle

Aspden, Richard Malcolm ; Rudman, Kate ; Meakin, Judith Rowena. / A mechanism for balancing the human body on the hips. In: Journal of Biomechanics. 2006 ; Vol. 39, No. 9. pp. 1757-1759.
@article{f6eaf8b7e75345cf92a5db9638aee33a,
title = "A mechanism for balancing the human body on the hips",
abstract = "A mechanism for the postural balance of the human torso over the hip joints is reported that does not appear to have been fully recognised. The centre of gravity of the torso is usually considered poised above the hips. This is in a state of unstable equilibrium. Here, we propose that body weight acting through the sacrum is counter-balanced by tension in the ilio-femoral ligament; the hips acting as the fulcrum. This places the torso in stable equilibrium and means that balance may be maintained with minimal muscular forces. The joint reaction force due to this mechanism in a two-legged stance is then of the order of the body-weight on each hip. An implication is that capsular ligaments are important and consideration should be given to retaining or restoring them as much as possible in hip arthroplasty. (c) 2005 Elsevier Ltd. All rights reserved.",
keywords = "hip, balance, loading, stability, equilibrium, forces",
author = "Aspden, {Richard Malcolm} and Kate Rudman and Meakin, {Judith Rowena}",
year = "2006",
doi = "10.1016/j.jbiomech.2005.04.028",
language = "English",
volume = "39",
pages = "1757--1759",
journal = "Journal of Biomechanics",
issn = "0021-9290",
publisher = "Elsevier Limited",
number = "9",

}

TY - JOUR

T1 - A mechanism for balancing the human body on the hips

AU - Aspden, Richard Malcolm

AU - Rudman, Kate

AU - Meakin, Judith Rowena

PY - 2006

Y1 - 2006

N2 - A mechanism for the postural balance of the human torso over the hip joints is reported that does not appear to have been fully recognised. The centre of gravity of the torso is usually considered poised above the hips. This is in a state of unstable equilibrium. Here, we propose that body weight acting through the sacrum is counter-balanced by tension in the ilio-femoral ligament; the hips acting as the fulcrum. This places the torso in stable equilibrium and means that balance may be maintained with minimal muscular forces. The joint reaction force due to this mechanism in a two-legged stance is then of the order of the body-weight on each hip. An implication is that capsular ligaments are important and consideration should be given to retaining or restoring them as much as possible in hip arthroplasty. (c) 2005 Elsevier Ltd. All rights reserved.

AB - A mechanism for the postural balance of the human torso over the hip joints is reported that does not appear to have been fully recognised. The centre of gravity of the torso is usually considered poised above the hips. This is in a state of unstable equilibrium. Here, we propose that body weight acting through the sacrum is counter-balanced by tension in the ilio-femoral ligament; the hips acting as the fulcrum. This places the torso in stable equilibrium and means that balance may be maintained with minimal muscular forces. The joint reaction force due to this mechanism in a two-legged stance is then of the order of the body-weight on each hip. An implication is that capsular ligaments are important and consideration should be given to retaining or restoring them as much as possible in hip arthroplasty. (c) 2005 Elsevier Ltd. All rights reserved.

KW - hip

KW - balance

KW - loading

KW - stability

KW - equilibrium

KW - forces

U2 - 10.1016/j.jbiomech.2005.04.028

DO - 10.1016/j.jbiomech.2005.04.028

M3 - Article

VL - 39

SP - 1757

EP - 1759

JO - Journal of Biomechanics

JF - Journal of Biomechanics

SN - 0021-9290

IS - 9

ER -