Analysis of weight distribution strategies in unilateral transtibial amputees during the stand-to-sit activity.

Vibhor R Agrawal, Christopher O'Toole, Ignacio Gaunaurd, Robert Gailey

Research output: Contribution to journalArticle

Abstract

Current methods of quantifying the stand-to-sit activity (StTS) are resource intensive and have not been applied to unilateral transtibial amputees (TTAs). The purpose of this study is to define five phases of arm-rest assisted and unassisted StTS using simple instrumentation and implement this method for assessing TTA movement patterns. Twelve TTAs and 12 age-matched non-amputees performed StTS with and without arm-rest support. Symmetry of weight distribution between lower limbs was calculated for five StTS phases: Descent Initiation; Descent Deceleration; Seat-Contact; Stabilisation and Sitting. TTAs demonstrated an asymmetrical weight distribution pattern and a tendency to transfer weight to the intact limb during the course of the activity. Non-amputees had relatively higher symmetry and did not exhibit substantial weight shifts during the activity. Symmetry indices were similar for assisted and unassisted sitting in both subject groups. These results highlight a need for therapeutic interventions in TTAs for reducing loading asymmetries and associated co-morbidities.

Original languageEnglish (US)
Pages (from-to)121-129
Number of pages9
JournalErgonomics
Volume59
Issue number1
DOIs
StatePublished - Jan 2 2016

Fingerprint

distribution strategy
Amputees
Weights and Measures
Arm
Deceleration
Seats
Stabilization
comorbidity
Lower Extremity
stabilization
asymmetry
Extremities
Morbidity
contact
resources

Keywords

  • arm-rest assistance
  • biomechanics
  • event standardisation
  • stand-to-sit phases
  • Weight distribution symmetry

ASJC Scopus subject areas

  • Human Factors and Ergonomics
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Analysis of weight distribution strategies in unilateral transtibial amputees during the stand-to-sit activity. / Agrawal, Vibhor R; O'Toole, Christopher; Gaunaurd, Ignacio; Gailey, Robert.

In: Ergonomics, Vol. 59, No. 1, 02.01.2016, p. 121-129.

Research output: Contribution to journalArticle

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