The association between foot posture,single leg balance and running biomechanics of the foot |
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| Affiliation: | 1. Department of Podiatry, School of Health, Medical and Applied Sciences, CQUniversity Australia, Building 34, Bruce Highway, North Rockhampton, QLD 4701, Australia;2. Physical Education and Sports Science Academic Group, National Institute of Education, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, Singapore;1. University Hospitals of Derby & Burton, Uttoxeter Road, Derby DE22 2NE, UK;2. University of Plymouth, Plymouth, Devon PL4 8AA, UK;1. Department of Trauma and Orthopaedics, Gateshead Health Foundation NHS Trust, Sheriff Hill, Gateshead, Tyne and Wear NE9 6SX, United Kingdom;2. Department of Orthopaedics, Newcastle Freeman Hospital, Freeman Road, High Heaton, Newcastle upon Tyne NE7 7DN, United Kingdom;1. Department of Kinesiology and Physical Education, Faculty of Science, Wilfrid Laurier University, 75 University Ave. West, Waterloo, ON N2L 3C5, Canada;2. Department of Human Health and Nutritional Sciences, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada;1. Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan;2. Department of Physical Therapy, Faculty of Health Science, Kio University, Japan;3. Graduate School of Science and Technology, Keio University, Japan;4. Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Japan |
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| Abstract: | ObjectivesA mal-aligned foot posture (high-arched and flat feet) and poor single leg balance ability have been separately associated with foot injuries during running. Therefore, clinicians assess these routinely. However, the extent to which foot posture and single-leg balance ability affect actual foot biomechanics during running is not known. This study aims to investigate the association of foot posture, single-leg balance ability, and foot biomechanics during running.MethodThis is a cross sectional study of sixty-nine participants who had their foot postures and single-leg balance ability assessed. The Foot Posture Index and Balance Error Scoring System were used. Their foot kinetics was measured as they ran on an instrumented treadmill and foot kinematics was processed using a 3D motion capture system. Multiple-regression was used to analyse the variance of foot biomechanics explained by foot posture and single-leg balance ability.ResultsFoot posture and single-leg balance ability were found to account significantly for the variance in rearfoot eversion (24%) and forefoot dorsiflexion (7%). Two regression equations were derived, where rearfoot eversion and forefoot dorsiflexion during running may be predicted.ConclusionFoot posture and single-leg balance ability can predict rearfoot eversion and forefoot dorsiflexion only during running. Based on the regression equations, individuals with the same foot posture but different single-leg balance ability may exhibit different foot kinematics. However, the angular differences are small. The equations may be useful for clinicians working in places where running gait analysis equipment are not readily accessible. Further studies with larger sample sizes are required to validate these equations. In addition, further studies are necessary to investigate the effect of these two variables under different running conditions e.g. with footwear and with orthoses. |
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| Keywords: | Flat feet High arched feet Single-leg balance ability Running gait analysis Balance errors |
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