| Variables | Group | Pre-trial | Post-trial | p value | d (Cohen) |
|---|
| Sprint |
| 5 m (s) | PS | 1.21 ± 0.11 | 0.99 ± 0.12 ¥¥¥ ££ | < 0.001 a | 1.21 |
| P | 1.22 ± 0.06 | 1.14 ± 0.08 | < 0.001 b | 1.38 |
| C | 1.22 ± 0.05 | 1.21 ± 0.04 | < 0.001 c | 1.12 |
| 10 m (s) | PS | 2.17 ± 0.14 | 1.68 ± 0.23 ¥¥¥ ££ | < 0.001 a | 1.40 |
| P | 2.14 ± 0.12 | 2.01 ± 0.11 | < 0.001 b | 1.55 |
| C | 2.16 ± 0.09 | 2.14 ± 0.10 | < 0.001 c | 1.50 |
| 20 m (s) | PS | 3.57 ± 0.25 | 3.14 ± 0.11 ¥¥ £ | 0.005 a | 0.90 |
| P | 3.58 ± 0.22 | 3.40 ± 0.12 | < 0.001 b | 1.17 |
| C | 3.55 ± 0.20 | 3.54 ± 0.18 | 0.002 c | 0.98 |
| change-of-direction |
| T-Half (s) | PS | 7.00 ± 0.30 | 6.37 ± 0.25 ¥¥¥ £ | < 0.001 a | 1.24 |
| P | 7.17 ± 0.39 | 6.74 ± 0.28 | < 0.001 b | 1.17 |
| C | 7.13 ± 0.36 | 7.14 ± 0.30 | 0.007 c | 0.88 |
| Illinois-MT (s) | PS | 13.0 ± 0.3 | 11.9 ± 0.4¥¥¥ £ | < 0.001 a | 1.35 |
| P | 13.0 ± 0.4 | 12.4 ± 0.5 € | < 0.001 b | 1.55 |
| C | 13.1 ± 0.2 | 13.0 ± 0.2 | < 0.001 c | 1.19 |
| Jump tests |
| SJ (cm) | PS | 28.6 ± 4.0 | 36.6 ± 3.3 ¥¥¥ | < 0.001 a | 1.13 |
| P | 27.2 ± 3.8 | 35.6 ± 2.5 €€ | < 0.001 b | 1.98 |
| C | 27.3 ± 3.0 | 29.5 ± 2.7 | 0.005 c | 0.90 |
| CMJ (cm) | PS | 29.2 ± 3.5 | 40.3 ± 5.3 ¥¥ | 0.002 a | 0.98 |
| P | 30.7 ± 3.4 | 39.0 ± 3.1 €€ | < 0.001 b | 1.93 |
| C | 30.4 ± 3.4 | 31.8 ± 3.1 | < 0.001 c | 1.14 |
| 5JT (cm) | PS | 10.4 ± 0.6 | 11.1 ± 0.5 | 0.198 a | 0.48 |
| P | 9.8 ± 1.2 | 11.1 ± 1.5 | 0.012 b | 0.69 |
| C | 10.1 ± 1.1 | 10.2 ± 1.2 | 0.238 c | 0.45 |
- PS = plyometrics on sand; P = standard plyometrics; C = control group; n = number; s = seconde; SJ = squat jump; CMJ = counter-movement jump; 5JT = five-jump test; T- Half = T-Half test; Illinois-MT = Modified lllinois test; ¥ = denotes a significant difference between PS and C; £ = denotes a significant difference between PS and P; € = denotes a significant difference between P and C; a = denotes a main effect of group, b = denotes a main effect of time; c = denote a group x time interaction; ¥: p ≤ 0.05; ¥¥:p ≤ 0.01; ¥¥¥: p ≤ 0.001; £: p ≤ 0.05; ££: p ≤ 0.01; £££: p ≤ 0.001; €: p ≤ 0.05; €€€: p ≤ 0.001
