Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11622
Title: Effects of heel lifting on transtibial amputee gait before and after treadmill walking : a case study
Authors: Yeung, LF
Leung, AKL 
Zhang, M 
Lee, WCC 
Keywords: Gait
Heel lift
Long-distance walking
Muscle fatigue
Prosthetic alignment
Transtibial amputees
Issue Date: 2013
Publisher: SAGE Publications
Source: Prosthetics and orthotics international, 2013, v. 37, no. 4, p. 317-323 How to cite?
Journal: Prosthetics and orthotics international 
Abstract: Background: Prosthetic alignment is usually unchanged once optimized. However, a previous study indicated that long-distance walking significantly altered gait patterns, suggesting some alignment adjustments after walking are required. This study investigated the effects of alignment changes (by inserting a heel lift) on gait of a transtibial amputee before and after treadmill walking. Case Description and Methods: The subject walked, without heel lifts, on a treadmill until perception of fatigue. Gait changes upon heel lifting at the prosthetic side were studied before and after the treadmill walking Findings and Outcomes: For this subject before the treadmill walking, heel lifting induced drop-off with increased prosthetic-side knee flexion at mid-stance and pre-swing. The sound limb outreached to stabilize the gait. After the treadmill walking, the same heel lift did not induce drop-off. It reduced the plantar flexor power generation, potentially delaying its fatigue. Conclusion: After walking prosthetic-side heel lifting could be beneficial. Clinical relevance Many lower-limb amputees have difficulties in long-distance walking due to muscle fatigue. This case study proposes that appropriate alignment changes after some walking potentially relieve fatigue and encourage them to walk longer distances.
URI: http://hdl.handle.net/10397/11622
ISSN: 0309-3646
EISSN: 1746-1553
DOI: 10.1177/0309364612461521
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