Nader Farahpour1, AmirAli Jafarnezhad2, Mohsen Damavandi3, Abbas Bakhtiari4, Paul Allard5. 1. Sport Biomechanics Department, Bu-Ali Sina University, Hamedan, Iran. Electronic address: naderfarahpour1@gmail.com. 2. Sport Biomechanics Department, Bu-Ali Sina University, Hamedan, Iran. Electronic address: amiralijafarnezhad@gmail.com. 3. Faculty of Physical Education and Sport Sciences, Hakim Sabzevari University, Sabzevar, Iran. Electronic address: mohsen.damavandi1@gmail.com. 4. Medical University of Hamedan, Hamedan, Iran. Electronic address: Bakhtiariabbas75@yahoo.com. 5. Department of Kinesiology, University of Montreal, Montreal, QC, Canada. Electronic address: paul.allard@umontreal.ca.
Abstract
UNLABELLED: The link between gait parameters and foot abnormalities in association with low back pain is not well understood. The objective of this study was to investigate the effects of excessive foot pronation as well as the association of LBP with excessive foot pronation on the GRF components during shod walking. METHODS: Forty-five subjects were equally divided into a control group, a group of subjects with pronated feet only, and another group with pronated feet and LBP. Ground reaction forces were analyzed during shod walking. RESULTS: Foot pronation without low back pain was associated with increased lateral-medial ground reaction force, impulse, and time to peak of all reaction forces in heel contact phase (p<0.03). In low back pain patients with pronated foot, greater vertical reaction forces (p=0.001) and loading rate, and time to peak on propulsion force were observed compared to pronated foot without low back pain group. Impulse in posterior-anterior reaction force was smaller in the able-bodied group with normal foot than in the other groups (p<0.05). Positive peak of free moments of the LBP group was significantly greater than that in other groups (p<0.05). In conclusion, foot pronation alone was not associated with elevated vertical ground reaction forces. While, low back pain patients with foot pronation displayed higher vertical ground reaction force as well as higher loading rate. Present results reveal that gait ground reaction force components in low back pain patients with pronated foot may have clinical values on the prognosis and rehabilitation of mechanical LBP patients.
UNLABELLED: The link between gait parameters and foot abnormalities in association with low back pain is not well understood. The objective of this study was to investigate the effects of excessive foot pronation as well as the association of LBP with excessive foot pronation on the GRF components during shod walking. METHODS: Forty-five subjects were equally divided into a control group, a group of subjects with pronated feet only, and another group with pronated feet and LBP. Ground reaction forces were analyzed during shod walking. RESULTS: Foot pronation without low back pain was associated with increased lateral-medial ground reaction force, impulse, and time to peak of all reaction forces in heel contact phase (p<0.03). In low back painpatients with pronated foot, greater vertical reaction forces (p=0.001) and loading rate, and time to peak on propulsion force were observed compared to pronated foot without low back pain group. Impulse in posterior-anterior reaction force was smaller in the able-bodied group with normal foot than in the other groups (p<0.05). Positive peak of free moments of the LBP group was significantly greater than that in other groups (p<0.05). In conclusion, foot pronation alone was not associated with elevated vertical ground reaction forces. While, low back painpatients with foot pronation displayed higher vertical ground reaction force as well as higher loading rate. Present results reveal that gait ground reaction force components in low back painpatients with pronated foot may have clinical values on the prognosis and rehabilitation of mechanical LBPpatients.
Authors: AmirAli Jafarnezhadgero; Amir Fatollahi; Ali Sheykholeslami; Valdeci Carlos Dionisio; Mohammad Akrami Journal: Biomed Eng Online Date: 2021-11-27 Impact factor: 2.819
Authors: Jo Armour Smith; Heidi Stabbert; Jennifer J Bagwell; Hsiang-Ling Teng; Vernie Wade; Szu-Ping Lee Journal: J Sport Health Sci Date: 2022-02-10 Impact factor: 13.077
Authors: Ting-Ting Wu; Shin-Liang Lo; Hui Chen; Jeng-Sheng Yang; Hsien-Te Peng Journal: Int J Environ Res Public Health Date: 2022-07-10 Impact factor: 4.614