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.
