An investigation into hip muscle strength and biomechanical moments produced during chair sit down in older adults

Samuel, D., Hood, V. and Rowe, P.J. (2005) An investigation into hip muscle strength and biomechanical moments produced during chair sit down in older adults. Age and Ageing, 34, (Supplement 2), p.ii5. (doi:10.1093/ageing/34.ii5).


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Muscle strength is an important component of
performance and is a vital measure for
characterisation of functional capability in everyday
activities. Currently, there is little evidence with regard
to the impact of loss of strength at the hip joint on the
ability to perform a chair sit down activity in older

A custom-built torque dynamometer was used to
measure muscle strength of hip extensors in 82 older
adults who were aged 60 years and over. Isometric
strength was measured at three positions namely 45°,
30° and 0° of hip flexion within the joint range of
motion. Biomechanical analysis with Vicon motion
analysis system and Kistler force platforms was
performed to determine functional moments produced
during chair sit down.

Muscle strength decreased with increasing age for hip
extensors in all the three joint positions. The 80 year
olds had lower strengths (22% ± 3%) compared to
those in the younger age cohorts and the differences
were statistically significant. (P value <0.05) Hip
extensor strength was significantly correlated with
functional moments with a correlation coefficient r =
0.47. (P value = <0.001)

This investigation showed that poor hip extensor
strength was associated with reduced functional
moments produced at hip during chair sit down in
older adults. Hence, loss of muscle strength with
advancing age is likely to increase the demands of
performing this activity in older adults.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1093/ageing/34.ii5
Additional Information: Communications to the British Geriatrics Society Spring Meeting, 13–15 April 2005
ISSNs: 0002-0729 (print)
Related URLs:
Keywords: ageing, aging, functional ability, muscle strength
Subjects: R Medicine > RZ Other systems of medicine
R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
Q Science > QP Physiology
Divisions : University Structure - Pre August 2011 > School of Health Sciences
ePrint ID: 59078
Accepted Date and Publication Date:
November 2005Published
Date Deposited: 22 Aug 2008
Last Modified: 31 Mar 2016 12:40

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