Research Of Biomechanics And Entry Way Of Track Start In The Swimming Boosterstarting Platform

Swimming technology including preliminary pose, jump, fly, into the water, underwater glider, etc. Underwater glider used at this stage than any other stage time, into the water and underwater glider stage than any other stage of resistance is much larger, in the modern swimming training through technology improvement to minimize hips when resistance is more and more attention, so set out in the whole process of preliminary pose, jump, fly only researched is not comprehensive, and on into the water and the research to the comprehensive evaluation of underwater glider. This paper with the whole stage of the new starting platform of booster technology especially into the water, through the research of underwater glider can be more comprehensive uncover the characteristics of the technology, better able to provide a theoretical reference and basis for swimming training. Domestic study of start swimming technology is still stay on the surface of the preliminary pose, jump, fly and into the water, the water and underwater glide phase kinematics research, is also a kind of innovation on the method. For secondary to squat type ju athletes technology contrast, find out the differences between the technology of swimmers start with the training improvement can also help.This article through the literature material method, experimental method, mathematical statistics, the secondary squat type ju athletes technology preliminary pose, jump, and enter the water suspension kinematics analysis, the take-off phase synchronization of kinematics and dynamics analysis.Squatting type starting run-up ju good technique is to enhance the stability and lays the foundation for the stage of quick start, level athletes more than secondary athlete’s center of gravity position on the starting platform front, so as to break the balance of quick start; Level athletes leg knee joint Angle is greater than the secondary athletes, may be better off the starting blocks quickly.From Taiwan technical movement characteristic as from Taiwan in the whole phase hind leg knee joint Angle increases, and muscles do centripetal contraction, front knee Angle decrease then increase first, first do kneel again do and have a buffer storage stage; Secondary athletes front buffer and xu li knees lowest moment small against fast stretching in the knee joint Angle. Stretching in moment, fore legs knees minimum time optimal buffer xu li knee joint Angle needs further research.Away from the stage of starting dynamics analysis squat type ju technology are three power process in this stage, T0, T1(start to hand off period) of the largest contribution to the impulse to leave Taiwan speed, so the T0, T1(start to hand off period) technique is very important, the secondary athletes from Taiwan was410.23+/-19.55cm/s slow455.53+/-25.04cm/s in the first-level athletes because in the secondary athletes in reaction time to hand from moments don’t have to give full play to the hand, the body coordinate this part of the effect of the hard, makes the phase of the most strongly values and impulse than low level athletes, resulting in slow from Taiwan.First class athletes and second class athletes from the clear difference in time, because the secondary athletes leg knee joint Angle, front leg buffer xu li knees minimum time knee joint Angle is too small for quick stretching, secondary athletes in hand from behind the movement to connect appear problem, no coordination force can quickly broke out.From the horizontal velocity changes of different time found that the speed of change are the three stages of a rising stage (hand away from the stage to the second phase from Taiwan), and a steady decline stage (front leg from Taiwan to5m horizontal velocity), and a sharp decline in phase (5m to10m decline stage). After contrast found second-level athlete in5m to7m this stage than secondary athletes falling fast. Due to the athletes has already started to butterfly annealing technology, the causes of these differences may be the shortcomings of the butterfly and kicking.