Table 3.
Mean (± SD) values of the obtained times, velocity’s and performance indexes in the intermediate and advanced groups at the beginning (pre-test) and the end of the intervention (post-test).
| Variable | Intermediate (n = 15) | Advanced (n = 15) | ||
|---|---|---|---|---|
| Pre-test | Post-test | Pre-test | Post-test | |
| Lap 1 [s] | 14.7 ± 1.5 | 14.2 ± 1.4 | 12.9 0.9 | 12.3 ± 0.9 |
| Lap 2 [s] | 16.2 ± 1.8 | 15.0 ± 1.2 | 13.3 ± 1.1 | 12.8 ± 1 |
| Lap 3 [s] | 17.1 ± 1.7 | 15.5 ± 1.3 | 13.8 ± 1.2 | 13.3 ± 1.2 |
| Lap 4 [s] | 18.1 ± 1.9 | 16.1 ± 1.9 | 14.4 ± 1.2 | 13.7 ± 1.2 |
| Lap 5 [s] | 18.4 ± 1.5 | 16.6 ± 1.8 | 15.1 ± 1.4 | 14.5 ± 1.5 |
| Lap 6 [s] | 19.9 ± 1.6 | 17.4 ± 2.4 | 15.6 ± 1.7 | 15.1 ± 1.9 |
| Lap 7 [s] | 20.6 ± 1.4 | 17.7 ± 2.7 | 16.2 ± 1.8 | 15.6 ± 1.9 |
| Lap 8 [s] | 21.6 ± 1.6 | 18.10 ± 2.3 | 15.9 ± 1.9 | 15.4 ± 2.1 |
| Mean V [m/s] | 1.39 ± 0.1 | 1.56 ± 0.1### | 1.73 ± 0.1*** | 1.79 ± 0.2##*** |
| Max V [m/s] | 1.72 ± 0.17 | 1.79 ± 0.2### | 1.95 ± 0.1*** | 2.02 ± 0.1###*** |
| PI | 0.81 ± 0.1 | 0.87 ± 0.1### | 0.89 ± 0.04*** | 0.88 ± 0.1 |
***
different compare to the intermediate group at p < 0.001, ### different than in the pre-test at p <0.001, ## different than in the pre-test at p < 0.01