Table 6.
Certainty of evidence for meta-analysed outcomes
| Outcome | No. trials (no. participants) | Comparisons | Certainty of evidence |
|---|---|---|---|
| In-water vertical jump | 8 (n = 126) | PJT versus specific-active (3 groups) or active controls (1 group) | Lowd |
| In-water agility | 7 (n = 105) | PJT versus specific-active controls | Lowd |
| In-water time trials | 22 (n = 438) | PJT versus specific-active (8 groups) or active controls (9 groups) | Lowa,c |
| Maximal strength | 5 (n = 97) | PJT versus specific-active (3 groups) and active controls (1 group) | Moderatec |
| Horizontal jump | 4 (n = 105) | PJT versus active controls | Very lowa,b,c |
| Squat jump | 5 (n = 91) | PJT versus specific-active (1 group) and active controls (4 groups) | Lowa,c |
| Countermovement jump | 20 (n = 378) | PJT versus specific-active (8 groups) and active controls (7 groups) | Very lowa,b,c |
| Body mass | 7 (n = 158) | PJT versus specific-active (1 group) and active controls (6 groups) | Very lowa,d |
PJT plyometric jump training
aDowngraded by one level due to average PEDro score being moderate (< 6)
bDowngraded by one level due to high impact of statistical heterogeneity (> 75%)
cDowngraded by one level due to < 800 participants for the comparison or unclear direction of the effects
dDowngraded by two levels if both < 800 participants for the comparison and unclear direction of the effects were identified