Table 5.
Pre- and posttest comparisons of the stroke effect of topspin and backspin for CG.
Variables
Topspin
Backspin
Pretest
Posttest
∆%
p
-value
Pretest
Posttest
∆%
p
-value
Large area
12.90±4.89
15.40±2.78
19.38%
0.035
*
14.30±4.21
17.40±3.31
21.68%
0.037
*
Small area
0.80±1.13
2.30±0.82
187.5%
0.004
**
0.90±1.19
1.70±0.67
88.89%
0.099
Out
15.70±4.27
11.80±2.67
-24.84%
0.011
*
12.50±3.76
10.20±2.73
-18.40%
0.065
Net
2.60±1.27
3.81±0.89
46.54%
0.058
5.50±2.47
3.80±1.78
-30.91%
0.106
Miss
0.80±0.73
0.70±0.37
-12.50%
0.914
0.70±1.06
0.30±0.48
-57.14%
0.234
Racket-edge stroke
0.80±0.59
0.30±0.28
-62.50%
0.096
2.20±1.64
0.50±0.36
-77.27%
0.203
Ball speed
26.83±2.11
27.26±1.80
1.60%
0.047
*
25.50±1.85
26.54±2.31
4.08%
0.005
**
CG = Control group
* p< 0.05
** p< 0.01.