網(wǎng)球論文：江蘇省優(yōu)秀后備男子網(wǎng)球運(yùn)動員正反手上旋球下肢的運(yùn)動學(xué)分析

1、網(wǎng)球論文：江蘇省優(yōu)秀后備男子網(wǎng)球運(yùn)動員正反手上旋球下肢的運(yùn)動學(xué)分析【中文摘要】本文以江蘇省青少年體育運(yùn)動學(xué)校的四名具有代表性的優(yōu)秀網(wǎng)球男子青少年隊員為研究對象，使用兩臺Mega高速攝像機(jī)以300幀/秒的拍攝頻率，1/2000秒的曝光時間同步拍攝，利用peak框架在標(biāo)準(zhǔn)網(wǎng)球場地采集三維運(yùn)動影像資料，并通過德國SIMI-Motion錄像解析軟件系統(tǒng)進(jìn)行圖像解析，采用文獻(xiàn)資料法、圖像解析法、邏輯分析法、數(shù)據(jù)統(tǒng)計法等研究方法，選取重心、環(huán)節(jié)質(zhì)心等慣性參數(shù)指標(biāo)及各環(huán)節(jié)速度、角速度、位移等運(yùn)動參數(shù)指標(biāo)，對四名網(wǎng)球運(yùn)動員的下肢運(yùn)動在正反手擊球過程的相關(guān)運(yùn)動學(xué)參數(shù)進(jìn)行分析。通過下肢環(huán)節(jié)時間、空間參數(shù)和下肢與軀

2、干的配合的反饋，體現(xiàn)擊球中出現(xiàn)的問題，以此來作為訓(xùn)練中注意的事項，改善在擊球的不同階段出現(xiàn)的踝、膝、髖等環(huán)節(jié)以及下肢協(xié)調(diào)傳導(dǎo)方面出現(xiàn)的情況,同時提供有關(guān)下肢環(huán)節(jié)的運(yùn)動學(xué)數(shù)據(jù)參數(shù)，也為江蘇省網(wǎng)球青少年改善擊球技術(shù)提供數(shù)據(jù)參考。研究得出以下主要結(jié)果：(1)測試對象馬XX正手擊上旋球過程中，踝關(guān)節(jié)速度產(chǎn)生稍晚，其蹬地時機(jī)掌握不當(dāng)。吳天X踝關(guān)節(jié)變化幅度不明顯，不能夠產(chǎn)生良好的蹬地效果。(2)正手擊上旋球動作，測試對象在完成蹬伸技術(shù)過程中，先發(fā)力腿膝關(guān)節(jié)角度普遍小于合理的蹬伸角度，并且先發(fā)力腿的最小膝關(guān)節(jié)角度要小于后發(fā)力腿的膝關(guān)節(jié)角度。反手擊上旋球過程中測試對象左右膝角在擊球時刻前的準(zhǔn)備過程中在角度變化

3、幅度方面左膝角要大于右膝角,而曾XX左膝角偏小。（3）測試對象正手上旋球從引拍到擊球髖角逐漸增大,雙手反拍髖角受限，除劉XX外,其余隊員變化較小。（4）測試對象利用雙腿對身體重心的調(diào)整會產(chǎn)生相對的不穩(wěn)定?！居⑽恼縄nthispaper,fourelitejuniortennisplayersofthejuniorsportsschoolinJiangsuProvineeastheresearchobject.ByusingthetwoMegahigh-speedcameraswithshootingfrequencyof300frames/second,exposuretimeof1/20

4、00secondsynchronization,usingtheframeworkof“peak”inthestandardtenniscourttocollectthree-dimensionalmotionimagedata,andadopttheGermanSIMI-Motionanalysissoftwaretoanalysistheimages,andusingthemethodsofresearchsuchasliterature,imageanalysis,logicanalysis,statisticsandotherresearchmethods,selectingcente

5、rofgravity,linkcentroidandotherinertiaparameters,andlinkspeed,angularvelocity,displacementandothermovementparameterindex,toanalysisthelowerlimbsmovementintheprocessofforehandandbackhandofthefourjuniortennisplayers.Reflectingtheproblemsaccordingtofeedbacktimeandspaceparametersaboutlowerlimbsandlowerl

6、imbcoordination,astheattentionintraininordertoimprovetheankle,knee,hipandlowerlimbscoordinationinthedifferentstagesandlowerlimbstransmission,whileprovidingdataonlowerlimbkinematicschainparameters,alsoforjuniortennisplayersinJiangsuProvincetoimprovethetennisballtechniquetoprovidedata.Studyresultsshow

7、edthatthemainresults:(1)TheplayerofMaXXisincourseofforehandhitting,speedofankleproducelater,thetimingofpedalisincorrect.WuXX'svariationamplitudeofankleisnotobvious,cannotproduceagoodeffectofpedaling.(2)Theactionofforehandhittingtopspin,allplayerscompletedtheprocessofpedalingandstretching,kneeang

8、leofminimumlegslessthanthereasonablepointofviewingeneral,andthekneeangleoftheminimumlegbelowthekneeangleofsupportingtheleg.Topspinofthebackhandhitting,duringthetesttimetheplayersareaboutkneeanglebeforetheballduringthepreparationoftheextentoftheleftkneeangleisgreaterthantherightkneeangle,andleftkneeangleistoosmallofZengXX.(3)Theplayersarehittingtopspinballinforehand,thehipangleincreasefromreadytohit,limitedhipanglebackhandwithbothhands,inadditiontoLiuXX,theremainingmemberschang