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Table 6 Certainty of evidence for meta-analysed outcomes

From: Effects of Plyometric Jump Training on Measures of Physical Fitness and Sport-Specific Performance of Water Sports Athletes: A Systematic Review with Meta-analysis

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

  1. PJT plyometric jump training
  2. aDowngraded by one level due to average PEDro score being moderate (< 6)
  3. bDowngraded by one level due to high impact of statistical heterogeneity (> 75%)
  4. cDowngraded by one level due to < 800 participants for the comparison or unclear direction of the effects
  5. dDowngraded by two levels if both < 800 participants for the comparison and unclear direction of the effects were identified