Do prefabricated foot orthotics improve the biomechanical lower limb alignment in females demonstrating a pronated foot posture?

McGowan, Fiona (2016) Do prefabricated foot orthotics improve the biomechanical lower limb alignment in females demonstrating a pronated foot posture? Undergraduate thesis, University of Chichester.

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Abstract

There is strong indication from research that a pronated foot posture predisposes individuals to a diverse range of pathologies as a result of progressive biological adaptations producing biomechanical malalignment up the kinetic chain. Foot orthotics have been found to considerably improve associated symptoms, however the extent to which foot orthotics effect lower limb kinematics remains unclear. This study investigated the effect of prefabricated, anti-pronation foot orthotics on lower limb kinematics during a bilateral squat in pronated females.
Twelve pronated participants completed three squats without orthotics, three squats with orthotics pre-acclimatisation and three squats with orthotics post-acclimatisation. Ten Vicon Infra-Red MX T-series (T40-S) cameras (Vicon Motion Systems Ltd, Oxford, UK) captured lower limb kinematics from 34 retro-flective markers. Visual 3D software (version 5) calculated maximum and range of; knee valgus angle, femoral internal rotation angle and tibial internal rotation angle, from the participant’s dominant leg (degrees). Percentage change was calculated from an average of the three squats per condition, per participant, between none to pre and none to post, and Wilcoxon Signed Ranks tests analysed the data for significant differences (p=<0.05).
No significant differences were found between the conditions for all variables. However overall decreases in maximum angles were observed from none to post for all three variables, and a decrease in range of angle from none to post for knee valgus and tibial internal rotation. Large values of interquartile range were reported which may be responsible for lack of significant results. Additional trends were revealed, however further research is required to establish whether these are significant and as a result of orthotic intervention. It cannot be concluded that prefabricated orthotics do improve lower limb kinematics, however the pattern of the results follow trend with associated literature in the field.

Item Type: Thesis (Undergraduate)
Additional Information: BSc (Hons.) Sports Therapy
Subjects: Q Science > Q Science (General)
Divisions: Departments > Sport and Exercise Sciences
Undergraduate Dissertations
Depositing User: Ann Jones
Date Deposited: 29 Sep 2016 15:51
Last Modified: 29 Sep 2016 15:51
URI: http://eprints.chi.ac.uk/id/eprint/1962

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