S Entezari, R Memar, M Kakavand,
Volume 15, Issue 13 (9-2017)
Abstract
The aim of this study was the comparison of plantar pressure distribution, vertical ground reaction force and contact area between dominant and none-dominant limb in top-flight females taekwondo.10 healthy young top-flight females taekwondo were selected. plantar pressure ,vertical ground reaction force and contact area were evaluated by emed system .The obtained data were analyzed by paired -t test and Symmetry index significance difference in toes 3-5 contact area between dominant and none dominant limb In addition Symmetry index for each parameter indicate asymmetry between limbs. The most ground reaction force and plantar pressure applied on heel region and metatarsal 3-5 and the least ground reaction force and plantar pressure applied on toe 2and toes3-5 in both limb.
Dr Shirin Yazdani, Prof Nader Farahpour,
Volume 19, Issue 21 (9-2021)
Abstract
Background and Objective: although it is documented that the spine and hip alignments alter in scoliosis subjects, but the effect of these changes on the lower extremities’ biomechanics have not been well understood yet. So, the aim of this study was to compare hip, knee and ankle joint’s power generation and absorption during gait in patients with adolescent idiopathic scoliosis (AIS) and healthy controls. Methods: Using motion analysis system with 4 Vicon-460 cameras and two Kistler force plates, the kinematics and kinetics of gait was assessed in twenty girls with AIS and 20 matched healthy controls, then the power of the right and left hip, knee and ankle joints in sagittal plane was calculated. Data was analyzed using ANOVA statistical method with significance level of α<0.05. Results: Results showed that in scoliosis group, the peak power absorption of the right knee was significantly 12.5% smaller than that in control group (p=0.01). But, peak power generation and absorption of the hip and ankle joints in both right and left limbs were not statistically differed between the two groups (p>0.05). Conclusion: scoliosis is associated with the smaller power absorption of the knee joint at convex side. This might be linked with unilateral alterations of the joints' moment, joint forces, and the related muscle activity which might impose asymmetrical force to the hip and cause curve progression.
