Lower Extremity Biomechanical Analysis Of Elite Female Boxers During Straight Punch

Objctive: Analysis on the research of straight boxing from the angle of sports biomechanics,most from the reaction of the ground and the punch and the speed of the athlete's boxing although there have been research and analysis of boxing athletes in the straight fist of the lower extremity surface reaction characteristics,but not the joints of the lower limbs.This study investigates and compares the lower limb strength and joint angle(hip,knee,ankle joint)of the female boxers at any level and high levels.Methods:Using the QUALISYS infrared optical motion capture system and Kistlerforce,platform(kistler9281CA,Switzerland,1000Hz),lower limb joint angles when gathering place with help of straight punches and ground reaction forces and conducting research.Results: 1.Ren Cancan And first-level athletes respectively at the total time of 42% and 40% pedal force to the maximum value,two-level athletes at the total time of 51% to achieve the maximum value.2.Ren Cancan And the first-level athletes with the trend of the hind legs,but the start-up strength and explosive power of the first level athletes,in line with the world today's boxing development of the punch fast,the characteristics of the fight.3.Ren Cancan has the shortest time of exerting force,indicating that his lower limb pedal has the greatest strength.The two-level athletes with the strength of the time is allowed to be capable and 2.4 times times the level of athletes,that is,the two-level athletes of the lower extremity rapid power has a great progress space.4.Ren Cancan and the level of the lower limb knee joint angle of the same trend,the beginning of the knee joint flexion angle is 22 °,respectively in the pedal force the whole process of 45% and 44% to the knee joint flexion angle Peak,the knee flexion angle peak of 36 ° and 34 ° respectively.The two-level athlete's knee initial angle of 14 °,at the total time of 67% to achieve the peak of the angle of buckling,to 38 °.5.lower limb ankle joints at the beginning of the force pedal angle of 7.38 °,at the total time of 26% to achieve maximum value,the maximum value of the dorsal curvature reaches 8.07 °,at the end of the pedal stretch,the plantar angle is 6.53 °,the A-level athletes and two athletes kick-off start time,ankle plantar angle respectively for 1.08 and 0.58,respectively for 49% and 73% to achieve the peak of back curvature.Conclusioon: Female boxers of different grades,the higher the level,the shorter the lower limbs exerting time.1.Ren Cancan straight fist ground reaction peak was significantly higher than the level and two athletes.2.The higher the athletic rank of female boxers in different grades,the smaller the hip flexion peak angle of the lower limbs of the straight fist.3.Ren Cancan straight fist of the lower limbs of the joint angle is mainly manifested in the ankle joint,straight boxing beat the ankle joint back flexion angle large,exerting the process of the ankle joint angle from the back to Plantar joints,and other horizontal athletes significantly different.