Study On The Characteristics Of Foot Pressure Changes In Open Forehand Batting Of Tennis Players

Objective: to study the characteristics of foot dynamics in tennis teaching and training,and analyze tennis players' open forehand.The sole pressure distribution of the active leg(right foot)when hitting a ball.The research on the dynamic characteristics of the foot can help to improve the technical movements of the tennis players,arrange the training plan and teaching methods reasonably,and be used as a means of monitoring to prevent the occurrence of sports injuries.To provide theoretical data service for the design,research and development of sneakers and teachers' instruction.Methods: the methods of literature,experiment and mathematical statistics were used in this study.The subjects were divided into two groups: secondary transport Mobilization,two-level athletes,each of the eight.Free Step plantar pressure system was used to test the test,and SPSS 17.0 software was used to analyze it.Results:1.When the ball is hit,the second-hand athlete's foot-axle angle is35.58±11.65°,and the second-level athlete is 39.58±10.84°.The two groups have little difference in the foot-shaft angle,and the second-level athlete is slightly smaller than the second-level athlete.2.The peak pressure in the first metatarsal(M1)region of secondary athletes was higher than that of the secondary athletes(255.53±137.68)(144.39±58.29)and there was a significant difference(p<0.05).3.The peak pressure of secondary athletes in the lateral(HL)region of the heel(7.12±1.75)is less than that of the secondary athletes(10.54±1.24),and there is a very significant difference(p<0.01);4.The first-blade(M1)regional pressure impulse(192.14±70.56)is greater than that of secondary athletes(108.95±50.01),and there is a significant difference(p<0.05).5.The time spent in contact with the forefoot of secondary athletes(0.39±0.14)is less than that of athletes below grade two(0.60±0.16)with a very significant difference(p<0.01);the time spent by the secondary athletes in contact with their feet(0.57±0.17))is greater than secondary athletes(0.28 ± 0.13),and has a very significant difference(p <0.01).in conclusion:1.In the hitting time,the foot axis angle is less than the second level athletes,which shows that the second level movement mobilization lower extremity balance ability and coordination ability is better;2.The regional pressure peak value of the first metatarsal bone of the foot was higher than that of the athletes below the second grade,and there was significant difference,which indicated that the second class athletes had stronger foot strength in the stage of anterior palmar support.3.The peak pressure of each region of the forefoot is larger than that of the athletes below the second level,which indicates that the second class athletes have stronger ability to resist the impact of the foot.4.The contact time of the front palmar is less,which indicates that the second-level athletes can better complete the transition of the body's resultant force from the heel to the arch and the forepaw,and have more correct power chain.5.The plantar pressure center trajectory shows a smooth curve,which shows that the second-level player can judge the hitting point more accurately,and can more steadily control the body to finish the whole stroke smoothly.