Table 3.
Within-group effect sizes, confidence limits, likelihood effects and odds ratio for performance data.
| Variable | Baseline | Post-test | Effect size | Confidence limits | Likelihood effect is beneficial (%) | Likelihood effect is trivial (%) | Likelihood effect is harmful (%) | Effect description | Odd ratio of benefits to harm |
|---|---|---|---|---|---|---|---|---|---|
| Plyometric jump training group (n= 14) | |||||||||
| CMJ (cm) | 19.7±3.8 | 21.7±3.7 | 0.53 | -0.1 to 1.2 | 85.5% | 13.0% | 1.5% | Likely beneficial | 389 |
| SLJ (cm) | 134.3±15.7 | 148.4±13.9 | 0.95 | 0.3 to 1.6 | 90.7% | 6.7% | 2.6% | Likely beneficial | 380 |
| 25-m KWP (s) | 29.0±2.7 | 28.4±2.5 | 0.25 | -0.9 to 0.4 | 63.6% | 36.1% | 0.4% | Possibly beneficial | 487 |
| 25-m WP (s) | 20.3±1.0 | 19.7±1.0 | 0.60 | -1.2 to 0.0 | 87.1% | 11.2% | 1.7% | Likely beneficial | 383 |
| 15-m front crawl (s) | 10.1±0.5 | 9.6±0.4 | 0.99 | -1.6 to -0.3 | 90.9% | 6.4% | 2.6% | Likely beneficial | 369 |
| 25-m front crawl (s) | 18.2±0.9 | 17.52±0.7 | 0.85 | -1.5 to -0.2 | 90.1% | 7.6% | 2.4% | Likely beneficial | 372 |
| 50-m front crawl (s) | 40.0±1.7 | 39.1±1.5 | 0.56 | -1.2 to 0.1 | 86.2% | 12.2% | 1.6% | Likely beneficial | 386 |
| Control group (n=12) | |||||||||
| CMJ (cm) | 19.9±3.7 | 19.4±3.0 | 0.13 | -0.8 to 0.5 | 17.7% | 82.2% | 0.0% | Likely trivial | 526 |
| SLJ (cm) | 140.2±27.3 | 142.7±25.5 | 0.09 | -0.6 to 0.8 | 2.5% | 97.5% | 0.0% | Very likely trivial | 426 |
| 25-m KWP (s) | 25.3±2.3 | 25.2±1.8 | 0.02 | -0.7 to 0.7 | 0.0% | 100.0% | 0.0% | Most unlikely trivial | 8 |
| 25-m front crawl WP (s) | 18.6±1.9 | 18.9±1.7 | 0.19 | -0.5 to 0.9 | 46.3% | 53.5% | 0.2% | Possibly trivial | 480 |
| 15-m front crawl (s) | 9.53±0.8 | 9.3±0.8 | -0.36 | -1.0 to 0.3 | 77.9% | 21.2% | 0.9% | Likely beneficial | 400 |
| 25-m front crawl (s) | 17.17±1.2 | 16.9±1.4 | 0.20 | -0.9 to 0.5 | 50.0% | 49.8% | 0.2% | Possibly beneficial | 472 |
| 50-m front crawl (s) | 37.5±2.8 | 37.6±4.0 | 0.04 | -0.6 to 0.7 | 0.0% | 100% | 0.0% | Most likely trivial | 51 |
CMJ: countermovement jump; SLJ: standing long jump; 25-m KWP: 25-m kick without push; 25-m WP: 25-m front crawl without push.