Table 3.
ANOVA differences among three playing positions (defenders, midfielders and forwards) for the observed variables.
| Defenders |
Midfielders |
Forwards |
ANOVA |
||
|---|---|---|---|---|---|
| Mean ±SD | Mean ±SD | Mean ±SD | F-test (p) | η2 | |
| Age (years) | 17.00 ± 0.76 | 16.57 ± 0.98 | 17.6 ± 1.14 | 1.75 (0.21) | 0.17 |
| Years played (years) | 11.00 ± 1.6 | 10.71 ± 3.04 | 9.6 ± 3.65 | 0.42 (0.66) | 0.48 |
| BH (m) | 1.82 ± 0.04 | 1.81 ± 0.03 | 1.82 ± 0.03 | 0.14 (0.87) | 0.02 |
| BM (kg) | 71.75 ± 5.57 | 62.71 ± 1.98D | 77.60 ± 5.46M | 16.16 (0.00) | 0.65 |
| BF (%) | 11.47 ± 1.96 | 11.41 ± 2.72 | 10.88 ± 1.28 | 0.12 (0.88) | 0.01 |
| S20M (s) | 2.99 ± 0.09 | 3.03 ± 0.1 | 3.05 ± 0.09 | 0.52 (0.60) | 0.06 |
| SJ (cm) | 35.79 ± 2.42 | 34.0 ± 3.85 | 33.22 ± 4.24 | 0.97 (0.39) | 0.1 |
| CMJ (cm) | 38.01 ± 2.6 | 36.59 ± 3.97 | 35.22 ± 3.11 | 1.15 (0.33) | 0.12 |
| IA (%) | 11.82 ± 10.63 | 13.11 ± 5.59 | 5.4 ± 3.06 | 1.80 (0.20) | 0.21 |
| RSI (m/s) | 1.55 ± 0.17 | 1.54 ± 0.22 | 1.4 ± 0.19 | 0.89 (0.43) | 0.12 |
| SQUAT1RM (kg) | 104.9 ± 8.17 | 83.3 ± 8.21 | 104.7 ± 11.72M | 9.82 (0.00) | 0.62 |
| R-SQUAT 1RM (kg) | 1.44 ± 0.16 | 1.34 ± 0.14 | 1.36 ± 0.06 | 0.75 (0.49) | 0.11 |
| S_CODS (s) | 7.59 ± 0.44 | 7.53 ± 0.42 | 7.35 ± 0.55 | 0.23 (0.79) | 0.05 |
| S_RAG P1 (s) | 9.65 ± 0.44 | 9.46 ± 0.32 | 9.56 ± 0.44 | 1.86 (0.18) | 0.04 |
| S_RAG P2 (s) | 9.65 ± 0.64 | 9.48 ± 0.25 | 9.42 ± 0.31 | 1.27 (0.30) | 0.05 |
| S_RAG P3 (s) | 9.43 ± 0.4 | 9.69 ± 0.44 | 9.59 ± 0.57 | 0.53 (0.59) | 0.07 |
BH, body height; BM, body mass; BF, body fat; S20M, sprint 20 m; SJ, squat jump; CMJ, Countermovement Jump; IA, index of asymmetry (the difference in the unilateral CMJ height between the legs); RSI, reactive strength index; SQUAT1RM, 1 repetition maximum in back squat; oxR-SQUAT1RM, relative strength in back squat; S_CODS, the soccer-specific change of direction speed test; S_RAG, the soccer-specific reactive-agility test; P1-P3, three different protocols of S_RAG; η2, partial eta squared; D indicates values significantly different from those obtained by defenders at p < 0.05; M indicates values significantly different from those obtained by midfielders at p < 0.05.