چکیده:
The purpose of this study was to compare the activity of the medial gastrocnemius, tibialis posterior muscles and the maximum vertical ground reaction force in the single-leg landing movement of men with and without bowlegs from different heights. 22 healthy male students of physical education and sports science, including 10 people with bowlegs and 12 people with normal knees, participated in this study. Bowleg abnormality was measured with calipers and goniometer. The subjects performed a single-leg landing movement from three heights of 20, 40, and 60 cm on a force plate. The landing movement was divided into two phases: 100 milliseconds before the initial contact of the foot with the ground and 100 milliseconds after the foot contact with the ground (force absorption phase). Matlab R2009a, SPSS version 21 and two-way ANOVA were used to analyze the data (P≤0.05). No significant difference was observed between the two groups in the maximum vertical ground reaction force at toe strike at three heights (P>0.05). No significant difference was observed in the activity of the medial gastrocnemius and tibialis posterior muscles before landing between the two groups, but a significant difference was found in the activity of the medial gastrocnemius muscle during the force absorption phase between the two groups (P>0.05) and the tibialis posterior muscle did not show a significant difference (P>0.05). Increased maximum vertical ground reaction force and decreased activity of calf muscles (especially medial gastrocnemius) in individuals with bowlegs may cause injury and the development of degenerative joint diseases in the long run.
خلاصه ماشینی:
Comparison of Maximum Vertical Ground Reaction Force and Electromyography of Calf Muscles During Single-Leg Landing in Men with and Without Genu Varum at Different Heights Seyed Kazem Mousavi 1 - Seyed Sadruddin Shojaedin 2 – Raghad Memar 3 1.
Assistant Professor, Department of Sports Biomechanics, Faculty of Physical Education and Sports Sciences, Kharazmi University of Tehran, Iran Abstract The purpose of this study was to compare the activity of the medial gastrocnemius, soleus muscles, and maximum vertical ground reaction force during single-leg landing in men with and without genu varum at different heights.
Therefore, the aim of the present study was to compare the amounts of vertical ground reaction force and electrical activity of plantar flexor muscles in individuals with genu varum abnormality and normal in the single-leg landing movement from different heights.
Mean and Standard Deviation of Age, Weight, Distance Between Medial Epicondyles of the Knee Joint, and Q Angle in Varus and Normal Knee Groups (Refer to the image on the page) In this study, knee type and different heights were considered as independent variables, and the maximum vertical ground reaction force at toe and heel strike, muscle activity levels of the soleus and medial gastrocnemius in time intervals of 100 milliseconds before and 100 milliseconds after landing were considered as dependent variables.
(
, 
, 
)
