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