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.
