The Effect Of The Posture Of The Two Feet On The Contraction Ratio Of The Medial And Lateral Muscles Of The Four Heads When Sitting Up

Research purposes: Sitting in the daily life of the essential movement of the way,each person has a different sitting posture,sitting in a different attitude,the internal and external muscles of the situation,the amount of internal and external muscle strength for patella stability will have an impact.Through this experiment to explore the next step.In this study,by allowing the subjects to do six feet gesture sitting action,through the surface electromyography,motion camera and other systems,sitting under different feet gesture during the process,the medial and lateral muscle of the surface of the muscle to test.Subjects: A total of 14 postgraduates(male)from Shandong Normal University were selected as subjects,aged 25 ± 0.81 years,height 179 ± 0.71 cm,weighing 72 ± 0.22 kg,14 subjects were healthy,without knee injury and other knee diseases.Research methods: In order to collect the EMG signals of the medial and lateral muscles in the two different legs,the Biovision multichannel surface electromyography developed by Germany was used to amplify the surface EMG signal of the internal and external muscles The frequency of the bandwidth is set between 10-500 Hz,1?V noise,CMRR is 120 d B,the input impedance is 109K?,the sampling frequency is selected 1000Hz;in the case of each sitting test,the digital camera(Sony-DCR-TRV17E)The camera was photographed before the test,and the camera was placed at a distance of 3 meters from the subject before taking the camera,using a shooting frequency of 50 Hz;the acquisition unit In the same way,the luminous flashlight will be turned on or off at the same time when the EMG signal is placed on the side of the subject by placing a luminous flashlight next to the subject and turning on or off the EMG signal of the medial and lateral muscles.Research result: In this paper,through the surface of the common life of several sitting attitude,through the surface of the electromyography,motion imaging and other systems,the medial and lateral muscles in the six different sitting posture and different knee bending angle of the ratio of electromyography,Biomechanical analysis,trying to explore the relative disadvantage of sitting posture,in healthy subjects,there was no significant difference.Conclusion: In order to balance the medial muscle and femoral lateral muscle strength to maintain the stability of the knee joint,in the daily life of the development of quadriceps muscle strength to carry out auxiliary exercises,dynamic movements such as leapfrog,jump step,after pedal run,uphill Running,regular foot kick football,is kick,static work such as horse step pile,stickers,etc.,to promote the balance of internal and external muscles within the development.In the future sports life,the choice of sports load should be appropriate,can not exceed the scope of the individual's ability,the choice of training methods to be targeted according to personal use,to avoid excessive load on the knee;quadriceps training To be continuous,step by step,making the stability of the knee continue to strengthen and improve,while enhancing the adaptability of the patella on the pull;...