| Purpose of study:From the point of view of kinematics combined with exercise associated muscle EMG of men’ turned back kick points stage’s analysis and comparison, the paper detected outstanding athletes turned back leg biomechanical characteristics, and explored the difference between elite athletes and normal athletes biomechanical characteristics. It summed up the high quality complete the action law of motion and the technical characteristics, and further improved and enhanced athletes turned back kick movement technical level through the contrast analysis, so as to establish a standard action model.Research methods:The multifunctional measuring force target, Kistler 3-D measuring force platform, wireless telemetering electromyography system, vicon test system, of six elite level athletes and six general level athletes were turned back kick movement synchronization test, from the attack time,crackdown, displacement of center of gravity, the fight against leg joint angle, trunk rotation, shoulder line speed and ground reaction forces and fight leg joint line speed index comparative biomechanical study of male athletes of different levels. two by the trial age, height, weight, no significant difference.Research results:1.Sanda turned back leg relative crackdown, the experimental group of elite athletes is about 3.04 KG. Control group athletes left 2.29 KG.Both have significant difference. the excellent athletes in the experimental group were significantly better than those in the control group, Compared with the control group.There is extremely significant difference in turn stage, after tic phase, the combat phase, experimental group of elite athletes for 0.35 seconds, 0.11 seconds, 0.11 seconds, the control group of athletes to 0.52 secs, 0.24 seconds, 0.19 seconds, three stage of the experiment group of elite athletes against time and total time were less than control group athletes, in the tic phase have significant difference combat phase.2.Turned back leg action three stages trunk twist, the experimental group of elite athletes were 111.49 degrees, 61.36 degrees, 9.44 degrees,the control group of players who were 135.33, of 50.31 degrees, 1.972 degrees or so. There was no significant difference between the two groups in the two groups at the later stage of the trunk twist angle. In the three phase, the experimental group was 278.20 degrees / second, 386.35 degrees / second, 84.47 degrees / second or so. Control group of athletes for 226.33 degrees / second, 283.56 degrees / second, 61.98 degrees /second or so.In the experimental group, the three stages of the elite athletes were faster than the control group, and the rotation speed of the trunk was significantly different between the two groups.3.The three critical points of the experimental group were 171.7,126.02 and 160.27 degrees, respectively. Compared with the control group, the angle of the hip joint was 168.47 degrees, 136.83 degrees and157.23 degrees respectively. After the independent sample T test, at the end of the end of the stage and the beginning of the attack stage, the experimental group and the control group of elite athletes have significant differences. In the three stages of the critical point, the experimental group of elite athletes to fight leg knee were 142.62 degrees, 130.87 degrees, 102.91 degrees. In the control group, the angle of attack leg and knee joint were 140.27 degrees, 125.96 degrees and123.67 degrees respectively. After the independent sample T test, the experimental group of excellent athletes and control group in the strike stage of the general athletes in the knee was significantly different.4.Experimental group of elite athletes in the turn stage, after the stage, the stage of the three stage of the focus of the upper and lower displacement are 2.82 cm, 6.47 cm, 2.24 cm or so. The experimental group at the top of the center of gravity moves up and down the maximum, while the control group in the three stage of the center of gravity move respectively is 2.89 cm, 3.36 cm, 2.89 cm or so. After the independent samples T test, the two groups of athletes at the stage of the center of gravity displacement was significantly different.5.Experimental group of elite athletes in turn stage combat leg hip,knee, ankle joint line peak velocity were about 2.15 M / s, 2.97m/s,1.72m/s. Experimental group athletes in general is about 1.72 M / s, 2.09 M / s, 1.46m/s, by independent samples t test, there was no significant difference. After tic phase in the experimental group of elite athletes hip joint, knee joint and ankle joint line peak velocity 3.29m/s, 4.22m/s,10.33 M / s or so, control group athletes in general joint line peak velocity are about 2.22m/s, 3.66m/s, 8.05m/s. After independent samples T test showed significant differences in hip. Combat phase athletes in the experimental group turned swinging leg action in combating stage of hip,knee and ankle joint line peak velocity are about 1.66m/s, 5.63m/s,10.63m/s. Control group athletes turned back leg movements in attack stage of hip, knee and ankle joint line peak velocity are about 1.59m/s,5.04m/s, 8.22m/s. Through the independent sample t-test, ankle joint line peak velocity showed significant difference. In the experimental group,the peak of the speed of the shoulder joint and the support leg at the turn stage were 2.78 m/s, 2.96m/s and so on. Compared with the control group,the sports personnel were 2.46m/s, 2.73m/s or so, there was no significant difference between the two groups of independent samples T test. After tic phase in the experimental group of elite athletes turnedback kick against leg and shoulder joints and supporting legs shoulder line peak velocity are about 3.06m/s 3.16m/s. Control group turned back leg action blow leg and shoulder joints and supporting legs shoulder line peak velocity were about 2.28m/s 2.60m/s. The independent samples T test showed significant difference. In the combat phase, the experimental group turned back kick against leg and shoulder joints and supporting legs shoulder line peak velocity were 1.09 + 0.13m/s, 1.30 + modified,1.15 + 0.26m/s, 1.25 + 0.42m/s respectively in the control group turned back leg action blow leg and shoulder joints and supporting legs shoulder line peak velocity, by independent sample t test no significant difference.6.Experimental group of elite athletes in turn stage, after tic phase,combat phase of the ground reaction force were 21.9N/kg, 13.7 n / kg,10.25 n / kg or so, the control group of three phase ground reaction forces were about 15.61 n / kg, 1.529 n / kg, 12.36N/kg. After the independent sample T test, in the turn phase of the experimental group and the control group of outstanding athletes in general athletes were significantly different.7. In turn stage of elite athletes and normal athletes fight leg rectus femoris had significant difference, turn stage group, the excellent muscle contribution of experimental group was higher in is supporting legs of rectus femoris, against the leg of the rectus femoris, supporting leg biceps femoris and control muscle group contribution larger for supporting legs of the rectus femoris, a supporting leg gluteus maximus,support legs and biceps femoris. In tic phase of elite athletes and normal athletes fight leg gluteus maximus had significant difference, the muscle with degree larger is supporting legs of rectus femoris, against the leg of external oblique muscle of abdomen, fight leg gluteus maximus,supporting legs latissimus dorsi, athletes in general support leg of the rectus femoris, support legs dorsal latissimus dorsi, against the leg of external oblique muscle of abdomen, hit the thigh biceps. Assault group of outstanding athletes dorsal latissimus dorsi and normal athletes have significant difference, the stage muscle elite athletes with degree larger for legs blow biceps femoris, support legs of rectus femoris, legs blow rectus abdominis, against the leg of external oblique muscle of abdomen,legs blow erector spinae, general athletes muscle contribution to a greater degree of supporting legs of the rectus femoris, blow thigh biceps,blow leg of the erector spinae muscles and legs blow latissimus dorsi blow. |
PDF Full Text Request