Table 4.
Pre- and posttest comparisons of the stroke effect of topspin and backspin for EG.
Variables
Topspin
Backspin
Pretest
Posttest
Δ%
p
-value
Pretest
Posttest
Δ%
p
-value
Large area
13.30±4.50
19.00±2.06
42.86%
0.008
**
10.90±3.46
18.90±2.13
73.39%
0.007
**
Small area
0.60±0.97
4.20±0.79
600.00%
0.005
**
0.40±0.69
4.10±1.37
925%
0.005
**
Out
15.50±3.86
11.10±2.72
-28.39%
0.033
*
15.40±3.42
10.60±4.17
-31.17%
0.011
*
Net
1.90±1.08
2.10±0.96
10.53%
0.798
2.30±1.45
2.00±1.03
-13.04%
1.000
Miss
0.60±0.70
0.40±0.69
-33.33%
0.527
1.40±1.26
0.30±0.18
-78.57%
0.040
*
Racket-edge stroke
0.70±0.48
0.40±1.26
-42.86%
0.206
1.40±1.64
0.10±0.12
-92.86%
0.043
*
Ball speed
26.27±3.12
27.33±2.54
4.04%
0.005
**
24.50±1.52
26.40±1.18
7.76%
0.005
**
EG = Experimental group
* p< 0.05
** p< 0.01.