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Showing 4 results for Pronation
Ebrahim Piri , Mohsen Barghamadi , Reza Farzizade ,
Volume 24, Issue 4 (12-2022)
Abstract
Background and Objective: The ankle is one of the most vulnerable joints in the body in terms of weight bearing. The pronate foot is the most common complication of the lower limbs that causes a decrease in the height of the internal longitudinal arch when bearing body weight. This study was conducted to compare the effect of exercises in water and with thera-band on loading rate, impulse, and free torque in people with pronation immediately and after eight weeks.
Methods: This clinical trial was conducted on 45 male students with pronate foot at the University of Mohaghegh Ardabili. The subjects were randomly divided into three groups of 15 people including control, thera-band, and water training. The intervention groups performed the exercises for eight weeks and the immediate and long-term effects of the exercises were compared.
Results: The positive and negative peaks of free torque, vertical loading rate, and vertical impulse in the water training group after eight weeks decreased significantly compared to the pretest and immediately after exercise (P<0.05). Also, the internal-external direct impulse in the water training group increased significantly after eight weeks compared to the pretest and immediately after exercise (P<0.05). In addition, the positive peak of free torque and vertical impulse decreased significantly in the thera-band group after eight weeks compared to the pretest and immediately after exercise (P<0.05). Moreover, the loading rate decreased significantly immediately and after eight weeks in the thera-band group compared to the pretest (P<0.05).
Conclusion: Eight weeks of exercise in water and with thera-band can improve loading rate, free torque, and impulse in people with pronate foot during walking.
Ebrahim Piri , Amir Ali Jafarnezhadgero , Hamed Ebrahimpour ,
Volume 25, Issue 4 (12-2023)
Abstract
Foot pronation, as one of the prevalent foot abnormalities, can influence the biomechanics of the lower limbs. The use of various foot orthoses, including insoles and braces, is very common in eliminating this problem. The results obtained regarding the effect of orthoses on pain and biomechanics of individuals with foot pronation are different. The present review study was conducted to evaluate the effects of foot orthoses and shoes on the biomechanics of the lower limbs and balance in individuals with foot pronation. The articles were searched in Persian and Latin languages during 2004-22 in the databases of PubMed, Web of Science (WOS), Scopus, Islamic Science Citation (ISC), and Google Scholar search engine. Moreover, the types of the searched studies were original research, review studies, and clinical trials. Using keywords of Foot pronation, Foot orthoses, Medical soles, and Motion-control shoes, 52 relevant articles were selected, and 22 articles regarding the effects of orthoses and shoes on foot pronation were finally analyzed. Eight articles also reported that reducing forces imposed on the joints, absorbing shock, preventing pronation-related running injuries, and improving muscle activity occurred when using orthosis. Furthermore, 4 articles reported improving sports performance in athletes, reducing the ground reaction forces, and changing the frequency of muscle activity. Finally, 2 articles showed that motion-control shoes prevented intensifying the injury due to increased fatigue and subsequently increased mechanical loading during running. The results of the present study demonstrated that foot orthoses and motion-control shoes could have positive effects on balance, improving the activities of the lower limbs and reducing foot pronation and force imposed on the foot and lower limb joints.
Raziyeh Alizadeh , Amir Ali Jafarnezhadgero , Davood Khezri , Heidar Sajedi , Ehsan Fakhri Mirzanag ,
Volume 26, Issue 3 (10-2024)
Abstract
Background and Objective: Individuals with a history of anterior cruciate ligament (ACL) injury are at a higher risk of re-injury compared to healthy individuals. ACL-injured patients exhibit weaker longitudinal arches and increased foot pronation compared to healthy individuals. This study aimed to determine the effect of short-term use of anti-pronation insoles on plantar pressure variables following ACL reconstruction (ACLR) with a pronated foot during gait.
Methods: This quasi-experimental study was conducted on 15 male participants who had undergone ACLR with a pronated foot (mean age= 23.2±4.5 years) and 15 healthy males (mean age= 22.7±4.3 years) in Ardabil, Iran during 2022. Plantar pressure values during gait with and without the use of anti-pronation insoles were recorded and compared using a foot scanner (sampling rate: 300 Hz).
Results: The effect of the group factor on the big toe plantar pressure variable was statistically significant (P<0.05). Pairwise comparison results demonstrated a significant increase in pressure in the ACLR group (154.63±41.71 N/cm²) compared to the healthy group (126.54±26.57 N/cm²) (P<0.05). Intragroup comparison results revealed a significant decrease in pressure on the second to fifth toes (215.73±60.74 N/cm²) and the first plantar (420.58±107.56 N/cm²) when using anti-pronation insoles compared to the non-insole condition (the second to fifth toes (201.57±76.21 N/cm²) and the first plantar (400.78±118.20 N/cm²) in the ACL reconstruction group (P<0.05).
Conclusion: The use of anti-pronation insoles can effectively reduce plantar pressure after ACLR in individuals with a pronated foot during gait.
Hamed Sheikhalizade , Fariborz Imani , Amir Ali Jafarnezhadgero , Majid Mafi ,
Volume 26, Issue 4 (12-2024)
Abstract
Background and Objective: Gait is a fundamental movement pattern influenced by various structures. This study aimed to determine the effect of sand-based training on ground reaction force frequency spectrum in individuals with anterior cruciate ligament (ACL) reconstruction and pronated feet during gait.
Methods: This clinical trial was conducted on 28 male students with pronated feet and ACL injuries aged 22-25 years at Mohaghegh Ardabili University. Participants were randomly assigned to two groups of 14: A control group and a sand-based training group. The ground reaction force variables were measured using a force plate in the pre-test and post-test.
Results: The number of necessary harmonics in the free moment component decreased by 15.95% in the post-test (16.48±4.14) compared to the pre-test (19.11±2.15) of the control group (P<0.05). The number of necessary harmonics in the mediolateral direction of the ground reaction force decreased by 23.34% in the post-test (15.59±3.92) compared to the pre-test (19.23±2.66) of the training group (P<0.05). Additionally, the number of necessary harmonics in the anteroposterior direction of the ground reaction force increased by 33.04% in the post-test (21.61±2.55) compared to the pre-test (14.47±4.11) of the training group (P<0.05).
Conclusion: Sand-based training was able to improve the gait mechanics of individuals with ACL reconstruction and pronated feet.
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