| In this paper, a famous tennis player Li Na as the research object, by using themethod of data literature, excellent tennis player of the world famous tennis scholarNick, the most commonly used ten footwork as the main research content, select10games10players Li Na and the world before the year-end rankings, comprehensiveanalysis of the characteristics of her footwork Hard game; and some suggestions. Theresults showed that:1.Li Na in the game using the number of ten footwork accounted for abouthitting the total number of beats (in addition to serving),86.4%, and other footworkaccounted for about13.6%. The serve receive ten kinds of footwork accounted forabout72.5%of the non-return of serve ten kinds of footwork use accounts for about87.5%of the two phases is a difference of about15%. Li Na of hair in the game withserve receive using ten footwork frequency differences.2.Li Na in the non-return of serve sectors, the high and low frequencies Sort turnrespectively the offensive footwork accounted for29%, the defensive footwork23.8%,the stalemate sexual footwork23.3%. Li Na use ten batting footwork in the the totalbatting shoot number (tee), law offensive footwork> defensive footwork> stalematefootwork. To remove the impact of statistical error, the defensive footwork proportionof stalemate sexual footwork proportion of almost the same, while Li Na’s theoffensive footwork obvious than the stalemate sexual footwork and defensivefootwork. It can be seen that the characteristics of Li Na is more emphasis onattacking athletes.3.Li Na’s serve receive links the defensive footwork utilization rate accounted for43.9%said the Ming Lina return of serve mainly to use defensive footwork; theoffensive footwork usage accounted for23.9%, said Ming Lina desire to attack, is anoffensive player; simultaneously Li Na in serve receive ten kinds of footworkfootwork outside also accounted for27.3%, said Ming Lina irregular footwork servereceive more, can be seen Li Na predict the return of serve and the response needs tobe improved, but at the same time reflect its adaptability.4.Li Na has a relatively concentrated area in the use of ten kinds of footworkdistribution, but the regional distribution of some of the differences in the use of thereturn of serve and serve receive. Serve receive ten kinds the footwork of use regionaldistribution is relatively concentrated within2-3meters of the the Li Na stationsaround; basic non-return of serve, the use of footwork offensive area is distributed in the line and the middle of the bottom line between the relative concentration of theregion; use of stalemate sexual footwork of the regional distribution of mainly inmeters around near the bottom line, the bottom line; defensive footwork to use thearea is mainly distributed in the venue near the sideline on both sides and the bottomline after a relatively darker areas.5.Li Na in10games defensive footwork similar to the proportion of stalematefootwork score, a significant difference in the proportion of lost points. The thedefensive footwork lose points rate significantly higher than the score rate of nearly10%. The offensive footwork scores fraction higher than the loss of6%. All servestalemate footwork pros and cons of points was not significantly different, relativelystable. A difference of14%in defensive footwork significant differences occurredmainly in the situation is not good and the two rounds of the lack of threat, not only toserve also training hard defensive footwork, improving from defensive to offensiveability. All to serve a stalemate footwork and defensive footwork difference obviousrelative stability, the offensive footwork of success and failure rates are stilloutstanding offensive awareness. |
PDF Full Text Request