Experimental Study On The Effect Of Lower Limb Braking Ability Training On The Forward Moving Footwork Of Students In A Badminton Major Elective Class

Badminton,as an inter-net confrontation sport,is characterised by a small field,high speed and a high number of movements,which requires a high level of fast power for the lower limbs.Braking power,as a type of fast power,is crucial in the footwork movement.In footwork technique,the braking movement is both the end of the previous step and the beginning of the next step.However,in daily training and footwork teaching,there is more practice on starting power and explosive power,but little mention of braking power training.Therefore,according to the technical characteristics of footwork in modern badminton competition and the characteristics of classroom teaching,this paper proposes a lower limb braking ability training method to investigate the influence of lower limb braking ability training on the forward moving footwork of students in badminton main optional classes.It provides some reference for the teaching methods of badminton classes in colleges and universities.This paper adopts literature method,expert interview method,questionnaire method,experimental method and mathematical and statistical method to conduct a12-week experimental study with 20 students in badminton major elective classes 1and 2 of physical education class 2019 of Guangzhou Institute of Physical Education,in which class 1 is the experimental group and class 2 is the control group.The experimental group used lower limb braking ability training and the control group used regular lower limb training.In the experiment,the T-run,20-second cross quadrant jump,stride braking time,stride braking centre of gravity acceleration and hip-knee-ankle joint angle were selected as the lower limb braking ability indicators.After the experiment,the following results were obtained.（1）In the lower limb braking ability index,all the indexes of the students in the experimental group were very significantly different;the control group students only had significant differences in the indexes of T-run and acceleration of braking centre of gravity.（2）In the hip,knee and ankle joint angles,there were highly significant differences in the hip landing moment angle and maximum braking cushion moment angle,highly significant differences in the knee landing moment angle,significant differences in the maximum braking cushion moment angle of the knee joint and no significant differences in the ankle joint angle among the students in the experimental group;there were no significant differences in the hip,knee and ankle joint angles among the students in the control group.（3）In the forward movement gait index,there were highly significant differences in both indexes for the experimental group;for the control group,there were highly significant differences in the five left and right movement gait and significant differences in the ten four-point low centre of gravity movement gait（1）Lower limb braking ability training is better than conventional lower limb training in terms of lower limb braking strength,rapid change of direction and the ability to work with super isometric contractions.（2）The lower limb braking capacity training resulted in the strengthening of the centrifugal contraction of the muscles and joints of the lower limb,resulting in a change in the hip-knee-ankle joint angle during the stomp-step braking,resulting in an increase in the braking cushioning capacity during the three-step stomp-step internet stance and an improvement in the stance technique.（3）Compared with the conventional lower limb training,the lower limb braking ability training improved the forward moving stance more significantly,indicating that the lower limb braking ability training was more helpful to the improvement of forward moving stance.