Biomechanical Characteristics Of Main Joints Of Lower Limbs Of Overweight Male College Students Before And After Taping The Dominant Ankle Joint

Purpose: Overweight people need exercise to improve their health.Their lower limb joints bear too much weight,so participating in sports is often accompanied by sports risk.Results regarding the prevention of sports risks from ankle taping are inconclusive.Therefore,this article attempts to analyze the single-leg jumping and landing movements of overweight male college students before and after taping the dominant side ankle joint,and analyze and test the kinematics and dynamics indicators of their lower limbs.To explore whether ankle taping can reduce the risk of lower extremity joint injury.To provide a certain theoretical basis and exact guidance for the prevention of exercise risks in overweight people.Method: This paper recruits 28 healthy male college students aged 20-24 who have a certain sports foundation in Wuhan Institute of Physical Education as subjects.Among them,there are14 normal male college students and 14 overweight male college students(overweight male college students must meet 28kg/m2<BMI<30kg/m2).Vicon 3D infrared motion capture system(sampling frequency: 200 Hz)and Kistler 3D force plate(sampling frequency: 1000 Hz)were used to simultaneously capture the single-leg jumping and landing movements of the two groups of subjects before and after taping the dominant ankle joint.Visual 3D three-dimensional gait/body analysis software(C-Motion,Germantown,MID,USA)was used for calculation and processing.Two-way ANOVA was used to analyze the kinematics and dynamics indexes of the dominant side lower limb 100 ms before touching the ground and 300 ms after touching the ground.Results:1.The results of kinematics showed that the ankle dorsiflexion angle(p<0.01),knee flexion angle(p<0.01)and hip flexion angle(p<0.05)in overweight male college students in the buffer stage before taping were smaller than normal male college students,and the knee joint valgus angle was greater than normal male college students(p<0.05).After taping,the ankle plantarflexion angle(p<0.05),ankle varus angle(p<0.05)and ankle external rotation angle(p<0.01)decreased between overweight male college students and normal male college students when they touched the ground.In the buffer stage,the overweight male college students ankle dorsiflexion angle decreased(p<0.01),knee flexion angle increased(p<0.01),knee valgus angle decreased(p<0.05)and hip flexion angle increased(p<0.05).In the buffer stage,the normal male college students ankle dorsiflexion angle decreased(p<0.01),knee flexion angle increased(p<0.05),knee valgus angle decreased(p<0.05)and hip flexion angle increased(p<0.05).2.Dynamic results showed that the ankle plantar flexion moment(p<0.05),knee extension moment(p<0.05)and hip extension moment(p<0.05)in overweight male college students in the buffer stage before taping were smaller than those in normal male college students,and the knee valgus moment(p<0.05)was smaller than that of normal male college students.0.05)greater than normal male college students.The ankle plantarflexion moment(p<0.01),knee extension moment(p<0.01)and hip extension moment(p<0.01)increased,and the knee valgus moment(p<0.05)decreased in overweight male college students in the buffer stage after taping.The ankle plantarflexion moment(p<0.05),knee extension moment(p<0.01)and hip extension moment(p<0.01)increased,and the knee valgus moment(p<0.05)decreased in normal male college students during the buffer stage after taping.3.The vertical maximum ground reaction force(p<0.05)and loading rate of overweight male college students and normal male college students after taping were both lower than those before taping(p<0.01).At the same time,the stiffness of the ankle joint(p<0.01)and the stiffness of the knee joint(p<0.05)both showed increases after taping.Conclusion:1.The plantar flexion angle of the ankle joint of overweight male college students is larger than that of normal male college students when the ankle joint touches the ground before taping,which may make the ankle joint of overweight male college students prone to sprain.2.Overweight male college students and normal male college students had an increase in knee and hip flexion angles and a decrease in knee valgus angles during the buffer stage after ankle taping.This change is more beneficial for injury protection.3.After ankle taping in overweight male college students and normal male college students,the ankle plantarflexion moment,knee extension moment,and hip extension moment increased,while the knee valgus moment decreased,which indicated that ankle joint taping could reduce the Risk of joint damage.4.Overweight male college students and normal male college students have lower vertical maximum reaction force and load rate after ankle joint taping,indicating that ankle joint taping will reduce the corresponding impact of the ground on the human body and then reduce the risk of injury.