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 language | English (US) |
|---|---|
| Pages (from-to) | 121-129 |
| Number of pages | 9 |
| Journal | Ergonomics |
| Volume | 59 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2 2016 |
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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 journal › Article
}
TY - JOUR
T1 - Analysis of weight distribution strategies in unilateral transtibial amputees during the stand-to-sit activity.
AU - Agrawal, Vibhor R
AU - O'Toole, Christopher
AU - Gaunaurd, Ignacio
AU - Gailey, Robert
PY - 2016/1/2
Y1 - 2016/1/2
N2 - 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.
AB - 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.
KW - arm-rest assistance
KW - biomechanics
KW - event standardisation
KW - stand-to-sit phases
KW - Weight distribution symmetry
UR - http://www.scopus.com/inward/record.url?scp=84959862786&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84959862786&partnerID=8YFLogxK
U2 - 10.1080/00140139.2015.1057237
DO - 10.1080/00140139.2015.1057237
M3 - Article
C2 - 26043080
AN - SCOPUS:84959862786
VL - 59
SP - 121
EP - 129
JO - Ergonomics
JF - Ergonomics
SN - 0014-0139
IS - 1
ER -