| Comparison | Number of studies | Within- study bias | Reporting bias | Indirectness | Imprecision | Heterogeneity | Incoherence | Confidence rating |
|---|---|---|---|---|---|---|---|---|
| Endurance Training:Speed Training | 1 | Some concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Very Low |
| Flexibility Training:Regular Training | 1 | No concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Low |
| Plyometric Jump Training:Regular Training | 2 | No concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Low |
| Plyometric Jump Training:Speed Training | 2 | No concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Low |
| Regular Training:Speed Training | 2 | No concerns |
Some concerns |
No concerns | No concerns |
Major concerns | No concerns | Very Low |
| Regular Training:Traditional Strength Training | 1 | No concerns |
Some concerns |
No concerns | No concerns |
Major concerns | No concerns | Very Low |
| Speed Training:Traditional Strength Training | 4 | Some concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Low |
| Endurance Training:Flexibility Training | 0 | No concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Very Low |
| Endurance Training:Plyometric Jump Training | 0 | Some concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Very Low |
| Endurance Training:Regular Training | 0 | Some concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Very Low |
| Endurance Training:Traditional Strength Training | 0 | Some concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Very Low |
| Flexibility Training:Plyometric Jump Training | 0 | No concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Very Low |
| Flexibility Training:Speed Training | 0 | No concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Very Low |
| Flexibility Training:Traditional Strength Training | 0 | No concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Very Low |
| Plyometric Jump Training:Traditional Strength Training | 0 | No concerns |
Some concerns |
No concerns | Major concerns |
No concerns | No concerns | Very Low |