TABLE 4.
Effects of intervention-related variables and sample-related variables on performance.
| Balance | Throwing/hitting velocity or distance | Jumping | |||||||
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| Intervention variables | S | ES (p-value) | I2(%) | S (EG) | ES (p-value) | I2(%) | S (EG) | ES (p-value) | I2(%) |
| Frecuency | |||||||||
|
| |||||||||
| ≤ 2 d/w | 3 | 1.48 (0.02) | 79 | 3 | 0.23 (0.32) | 0 | 1 | 0.23 (0.61) | NA |
| > 2 d/w | 3 | 0.95 (0.0001) | 0 | 5(7) | 1.55 (0.007) | 94 | 9(15) | 0.98 (<0.0001) | 82 |
| p = 0.45 | p = 0.03 | ||||||||
|
| |||||||||
| Duration | |||||||||
| ≤ 6 weeks | 4 | 0.86 (0.0001) | 0 | 3 | 0.61 (0.01) | 0 | 2(3) | 0.90 (0.001) | 37 |
| > 6 weeks | 2 | 1.99 (0.007) | 72 | 5(7) | 1.41 (0.01) | 94 | 8(13) | 0.71 (0.0002) | 74 |
| p = 0.14 | p = 0.20 | p = 0.57 | |||||||
|
| |||||||||
| Implements | |||||||||
| With implements | 4 | 0.78 (0.001) | 0 | 7(9) | 1.21 (0.009) | 92 | 3 | 0.81 (0.0005) | 12 |
| Without implements | 2 | 1.89 (0.01) | 82 | 1 | 0.45 (0.05) | NA | 7(13) | 0.74 (0.0001) | 76 |
| p = 0.17 | p = 0.81 | ||||||||
|
| |||||||||
| Session duration | |||||||||
| ≤ 30 minutes | 1 | 2.72 (< 0.0001) | NA | 2 | 0.24 (0.34) | 0 | 4(5) | 1.05 (0.002) | 81 |
| > 30 minutes | 1 | 1.25 (0.03) | NA | 3(4) | 2.68 (0.02) | 95 | 2(4) | 0.08 (0.65) | 0 |
| p = 0.03 | p = 0.01 | ||||||||
|
| |||||||||
| Total volume | |||||||||
| ≤ 16 sessions | 3 | 1.48 (0.02) | 79 | 3 | 0.23 (0.32) | 0 | 1 | 0.23 (0.61) | NA |
| > 16 sessions | 3 | 0.95 (0.0001) | 0 | 5(7) | 1.55 (0.007) | 94 | 9(15) | 0.77 (< 0.0001) | 73 |
| Sample | p = 0.45 | p = 0.03 | |||||||
|
| |||||||||
| Sex | |||||||||
| Female | 2 | 1.99(0.007) | 72 | 1 | 0.24 (0.59) | NA | 3(5) | 0.96 (0.001) | 61 |
| Male | 3 | 0.98(0.0001) | 0 | 5(7) | 1.42 (0.005) | 93 | 4(6) | 1.13 (< 0.0001) | 35 |
| p = 0.19 | p = 0.63 | ||||||||
| Mixed | 1 | 0.40 (0.38) | NA | 1 | 0.07 (0.85) | NA | 3(5) | 0.72 (0.10) | 90 |
|
| |||||||||
| Age | |||||||||
| Youth (12 ≤ 18 years) | 3 | 1.00(0.0001) | 0 | 3(4) | 0.35 (0.32) | 75 | 6(9) | 0.79 (0.0003) | 71 |
| Adults (18–65 years ) | 3 | 1.39 (0.04) | 81 | 5(6) | 1.74 (0.01) | 94 | 4(7) | 0.67 (0.01) | 75 |
| p = 0.58 | p = 0.07 | p = 0.73 | |||||||
ES = effect size; S (EG) = number of studies (EG = experimental groups); NA = not applicable; d/w = days per week;