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Toe clearance and velocity profiles of young and elderly during walking on sloped surfaces

Khandoker, Ahsan H., Lynch, Kate, Karmakar, Chandan K., Begg, Rezaul K. and Palaniswami, Marimuthu 2010, Toe clearance and velocity profiles of young and elderly during walking on sloped surfaces, Journal of neuroengineering and rehabilitation, vol. 7, pp. 1-10, doi: 10.1186/1743-0003-7-18.

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Title Toe clearance and velocity profiles of young and elderly during walking on sloped surfaces
Author(s) Khandoker, Ahsan H.
Lynch, Kate
Karmakar, Chandan K.ORCID iD for Karmakar, Chandan K. orcid.org/0000-0003-1814-0856
Begg, Rezaul K.
Palaniswami, Marimuthu
Journal name Journal of neuroengineering and rehabilitation
Volume number 7
Article ID 18
Start page 1
End page 10
Total pages 10
Publisher BioMed Central
Place of publication London, Eng.
Publication date 2010-04-28
ISSN 1743-0003
Keyword(s) Aged
Aging
Female
Gait
Humans
Postural Balance
Toes
Walking
Young Adult
Summary BACKGROUND: Most falls in older adults are reported during locomotion and tripping has been identified as a major cause of falls. Challenging environments (e.g., walking on slopes) are potential interventions for maintaining balance and gait skills. The aims of this study were: 1) to investigate whether or not distributions of two important gait variables [minimum toe clearance (MTC) and foot velocity at MTC (VelMTC)] and locomotor control strategies are altered during walking on sloped surfaces, and 2) if altered, are they maintained at two groups (young and elderly female groups).

METHODS: MTC and VelMTC data during walking on a treadmill at sloped surfaces (+3 degrees , 0 degrees and -3 degrees ) were analysed for 9 young (Y) and 8 elderly (E) female subjects.

RESULTS: MTC distributions were found to be positively skewed whereas VelMTC distributions were negatively skewed for both groups on all slopes. Median MTC values increased (Y = 33%, E = 7%) at negative slope but decreased (Y = 25%, E = 15%) while walking on the positive slope surface compared to their MTC values at the flat surface (0 degrees ). Analysis of VelMTC distributions also indicated significantly (p < 0.05) lower minimum and 25th percentile (Q1) values in the elderly at all slopes.

CONCLUSION: The young displayed a strong positive correlation between MTC median changes and IQR (interquartile range) changes due to walking on both slopes; however, such correlation was weak in the older adults suggesting differences in control strategies being employed to minimize the risk of tripping.
Language eng
DOI 10.1186/1743-0003-7-18
Field of Research 0903 Biomedical Engineering
1109 Neurosciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2010, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30074272

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.