Table 1. The mean (± standard deviation) countermovement jump outcome and strategy values attained by each position and associated reliability data.
| Variable | Forwards | Backs | d | p | ICC | ICC LoCI95 | ICC UpCI95 | CV% | CV% LoCI95 | CV% UpCI95 |
|---|---|---|---|---|---|---|---|---|---|---|
| Outcome | ||||||||||
| Jump Height (m) | 0.34 ± 0.04 | 0.36 ± 0.04 | -0.60 | 0.03 | 0.96 | 0.94 | 0.98 | 3.23 | 2.39 | 4.06 |
| Reactive strength index modified (ratio) | 0.44 ± 0.08 | 0.48 ± 0.08 | -0.46 | 0.10 | 0.95 | 0.93 | 0.97 | 5.51 | 4.09 | 6.94 |
| Take-off Momentum (kg·m/s) | 265.11 ± 28.52 | 237.42 ± 26.24 | 1.01 | 0.00 | 0.99 | 0.99 | 1.00 | 1.58 | 1.19 | 1.98 |
| Propulsion Phase | ||||||||||
| Mean Net Force (N) | 997.67 ± 165.36 | 922.46 ± 158.89 | 0.46 | 0.09 | 0.97 | 0.96 | 0.98 | 3.72 | 2.68 | 4.77 |
| Rel. Mean Net Force (N/BW) | 0.99 ± 0.17 | 1.06 ± 0.17 | -0.40 | 0.51 | 0.97 | 0.95 | 0.98 | 3.72 | 2.68 | 4.77 |
| Time (s) | 0.266 ± 0.036 | 0.259 ± 0.037 | 0.20 | 0.47 | 0.96 | 0.94 | 0.98 | 3.39 | 2.36 | 4.43 |
| Displacement (m) | 0.429 ± 0.057 | 0.434 ± 0.059 | -0.09 | 0.76 | 0.96 | 0.94 | 0.98 | 3.48 | 2.51 | 4.44 |
| Rel. Displacement (%) | 23.53 ± 2.37 | 23.97 ± 3.19 | -0.15 | 0.57 | 0.95 | 0.92 | 0.97 | 3.48 | 2.54 | 4.41 |
| Countermovement Phase | ||||||||||
| Net Force at Zero Velocity (N) | 1429.19 ± 346.58 | 1336.67 ± 275.35 | 0.30 | 0.14 | 0.96 | 0.94 | 0.98 | 6.63 | 4.75 | 8.52 |
| Rel. Net Force at Zero Velocity (N/BW) | 1.43 ± 0.36 | 1.54 ± 0.31 | -0.33 | 0.51 | 0.97 | 0.95 | 0.98 | 6.63 | 4.75 | 8.52 |
| Time (s) | 0.615 ± 0.067 | 0.612 ± 0.090 | 0.04 | 0.87 | 0.90 | 0.84 | 0.94 | 7.21 | 5.18 | 9.23 |
| Displacement (m) | 0.318 ± 0.052 | 0.331 ± 0.061 | -0.22 | 0.44 | 0.96 | 0.94 | 0.98 | 4.32 | 2.95 | 5.68 |
| Rel. Displacement (%) | 17.49 ± 2.20 | 18.29 ± 3.35 | -0.28 | 0.76 | 0.95 | 0.93 | 0.97 | 4.32 | 3.08 | 5.55 |
| Peak Velocity (m/s) | 1.30 ± 0.23 | 1.31 ± 0.21 | -0.05 | 0.85 | 0.94 | 0.91 | 0.97 | 5.44 | 3.73 | 7.16 |
Negative effect sizes indicate that backs achieved a larger mean value than forwards. ICC = intraclass correlation coefficient. CV% = coefficient of variation percentage. LoCI95 = lower 95% confidence interval. UpCI95 = upper 95% confidence interval. Rel. = relative. BW = bodyweight.