How to measure the efficiency of the serve?
By Andre A. Kozenko (ctc@viaduk.net )
Summary
In the article is offered the Method of determination of quantitative importance of serve's efficiency. The coefficient of serve's efficiency is found in determinative dependence from speed of ball's flight and from accuracy of its hit in the determined zone of the court. On due to factorial analyses this dependency is found for first and second serves of a Tennis player. At determination coefficient of efficiency is used a simple test, requiring a measurer of serve's speed. The Author designed tables of estimation of serves' quality for juniors from 9 to 18. Now efficiency of serves of Tennis players is possible to compare quantitative, and that gives new possibilities to coaches and players. For illustration In article are indicated coefficients of serve's efficiency of several juniors and some professional players.
|
Player |
age |
rating |
<Vp> km/h |
<Vb> km/h |
Тp |
Тb |
Kp |
Kb |
K |
||
|
Ucr |
SU |
ATP |
|||||||||
|
Sasha G. |
12 |
400 |
- |
- |
121 |
84,3 |
0,3 |
0,7 |
0,4 |
0,34 |
0,37 |
|
Evgeniy C |
14 |
- |
60 |
- |
122 |
100 |
0,4 |
0,5 |
0,43 |
0,27 |
0,34 |
|
Kate K. |
12 |
- |
76 |
- |
102 |
98,4 |
0,55 |
0,6 |
0,37 |
0,32 |
0,344 |
|
Sasha B. |
16 |
- |
17 |
- |
153 |
91,2 |
0,1 |
1 |
0,43 |
0,5 |
0,464 |
|
Denis D. |
18 |
30 |
- |
- |
166 |
115 |
0,4 |
0,95 |
0,58 |
0,56 |
0,57 |
|
Ivanisevich |
29 |
- |
- |
22 |
200 |
190 |
0,54 |
0,77 |
0,729 |
0,64 |
0,683 |
|
Rafter |
27 |
- |
- |
12 |
174 |
165 |
0,57 |
0,95 |
0,64 |
0,72 |
0,679 |
Compare your serve with serve of Ivanisevich!
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