Table 3.
Synthesis of results across included studies regarding the effects of plyometric jump training on fitness attributes in basketball players.
| Fitness attribute | na | ES (95%CI) | p | I2 (%) | Egger's test (p) | RW (%) |
|---|---|---|---|---|---|---|
| Jumping variables | ||||||
| Vertical jump power | 4, 4, 4, 102 | 0.45 (0.07 to 0.84) | 0.021 | 0 | 0.323 | 20.8−34.1 |
| Countermovement jump with arm swing height | 11, 12, 11, 256 | 1.24 (0.72 to 1.75) | <0.001 | 71.2 | 0.120 | 4.8−10.4 |
| Countermovement jump height | 18, 21, 18, 500 | 0.88 (0.55 to 1.22) | <0.001 | 67.0 | 0.071 | 2.6−6.4 |
| Squat jump height | 11, 12, 11, 331 | 0.80 (0.47 to 1.14) | <0.001 | 51.8 | 0.008b | 3.5−12.3 |
| Drop jump height | 8,9, 8, 204 | 0.53 (0.25 to 0.80) | <0.001 | 0.0 | 0.567 | 4.8−29.1 |
| Horizontal jump distance | 8, 10, 8, 230 | 0.65 (–0.02 to 1.31)c | 0.001 | 80.9 | 0.008 | 7.4−12.5 |
| Sprint variables | ||||||
| ≤10-m linear sprint time | 3, 3, 3, 93 | 1.67 (0.32 to 3.03) | 0.016 | 85.1 | 0.307 | 24.8−38.7 |
| >10-m linear sprint time | 11, 13, 11, 281 | 0.92 (0.40 to 1.44) | <0.001 | 74.3 | 0.061 | 5.5−10.2 |
| ≤40-m change-of-direction performance time | 13, 15, 13, 307 | 1.15 (0.75 to 1.55) | <0.001 | 59.7 | 0.189 | 4.0−9.9 |
| >40-m change-of-direction performance time | 5, 6, 5, 93 | 1.02 (0.29 to 1.76) | 0.006 | 64.9 | 0.272 | 13.9−19.4 |
| Balance variables | ||||||
| Dynamic balance | 5, 5, 5, 149 | 1.16 (0.43 to 1.89) | 0.002 | 76.1 | 0.586 | 17.6−22.5 |
| Static balance | 4, 4, 4, 119 | 1.48 (−0.19 to 3.15) | 0.002 | 93.3 | 0.252 | 25.0−25.4 |
| Strength variables | ||||||
| Maximal strength | 5, 7, 5, 104 | 0.57 (0.07 to 1.07) | 0.025 | 38.0 | 0.117 | 10.1−17.5 |
| Hamstring/quadriceps strength ratio at 60 °/s | 4, 4, 4, 92 | −0.10 (−0.56 to 0.36) | 0.661 | 23.6 | 0.060 | 20.4−30.7 |
| Hamstring/quadriceps strength ratio at ≥120 °/s | 4, 4, 4, 92 | −0.04 (−0.56 to 0.48) | 0.885 | 39.8 | 0.785 | 21.8−29.4 |
Note: Bolded p values mean significant (p < 0.05) improvement in the experimental group after plyometric jump training as compared with the control group.
Data denote the number of studies that provided data for the analysis, the number of experimental groups, the number of control groups, and the total number of basketball players included in the analysis, respectively.
Adjusted values remained the same (as the observed values) after the trim and fill method.
Adjusted values are displayed using the trim and fill method.
Abbreviations: 95%CI = 95% confidence interval; ES = effect sizes (Hedge's g); RW = relative weight of each study in the analysis.