Analysis On Shoulder And Elbow Joint Angle Of Volleyball Spike Movement

This purpose of this paper is based on the 20 volleyball spiking movement, to analyze the internal logical relationship between the shoulder joint and elbow angle changes with the time. The significance of this paper lies in two aspects:1.From the aspect of theory, which can enrich the research of the joint of shoulder and elbow joint angle changes by volleyball spike; 2.From the practice of teaching, which can more directly and effectively guide the teaching work.This paper selects 20 male volleyball players in 2010 level of sports training professional of Inner Mongolia Normal University Sports Institute(age:22±1,height:178.10±9.10 cm,weight:73.05±22.95 kg, spiking height:286.59±23.59 cm,blockheight:281.45±18.45 cm,run-upheight:299.37±20.63cm).This paper uses six three dimensional infrared high speed camera, at the same time using Swedish Qualisys 3-D video motion analysis system, when the photography uses three-dimensional low-speed photography, shooting according to the experiment requirement to need four light stick, which is without manual identification of joint passive markers. The filming process, using QTM(Qualisys tracking analysis software) on the analysis of shoulder and elbow joints, obtaining the data, and then using the statistical software SPSS 17.0 and STATISTICA 8.0 and EXCEL for statistical analysis, at the same time the experiment uses case analysis. Conclusions:1.The Shoulder maxima in the range of 130.51°±15.58°, the elbow joint maximum is 165.57°±44.18°; the shoulder of the minimum range of 16.01°± 7.48°, a very small range of values of the elbow was 66.94°± 44.18°, shoulder and elbow correlation is larger, and correlation coefficient r =-0.748( P <0.01);2.The shoulder and elbow joint at the time of the change is angle of asynchrony;3.Volleyball dropping shot links of angle change appear lag;4.The left dominant arm coefficient of variation between different physical BMI, small but the coefficient of variation is small, shoulder and elbow joint angle shows good stability.Through this research, we suggest:1.Through the shoulder and elbow joint of upper limb movement for change, and only from the perspective of this index, which illustrates the macroscopical on volleyball spiking action, increasing the number of biomechanical parameters, such as time, acceleration, angular acceleration, angular velocity, displacement, torque; 2.Through the experimental data what is obtained, the corresponding joint blind area, which can not catch the signal, thus improving experiment instruments are needed to do, and try to control the experiment errors;3. Pairs of volleyball spiking movement, appear advantage arm of different groups of people, can be grouped contrast tests, from which it can be more objective data;4.In order to improve the success rate of the experiment, using a standard experimental area, and the best part is in full volleyball court, so to test an ideal environment.