Table 5.
Effect of heterogeneity across included studies within each meta-analysis
| Meta-analysis | Sub-group | Number of estimates | Number of GPS files | Between-group I2 (%) | Within-group I2 (%) | Qualitative descriptor | P value |
|---|---|---|---|---|---|---|---|
| Frequency of high-intensity accelerations and decelerations | 67 | 5220 | 99 | High | < 0.00001 | ||
| American Football | 9 | 294 | 0 | Low | 0.9 | ||
| Australian Football | 11 | 1180 | 85 | High | < 0.0001 | ||
| Hockey | 4 | 226 | 0 | Low | 0.51 | ||
| Rugby league | 14 | 799 | 87 | High | < 0.0001 | ||
| Rugby sevens | 2 | 51 | 97 | High | < 0.0001 | ||
| Rugby union | 16 | 516 | 57 | Moderate | 0.003 | ||
| Soccer | 11 | 2154 | 97 | High | < 0.0001 | ||
| Frequency of very high intensity accelerations and decelerations | 32 | 1169 | 94 | High | < 0.00001 | ||
| American Football | 9 | 294 | 92 | High | < 0.00001 | ||
| Rugby sevens | 4 | 225 | 95 | High | < 0.00001 | ||
| Rugby union | 16 | 516 | 31 | Moderate | 0.11 | ||
| Soccer | 3 | 134 | 89 | High | < 0.00001 | ||
| Temporal changes in frequency of accelerations | 8 | 373 | 0 | Low | 0.93 | ||
| High intensity | 5 | 227 | 0 | Low | 0.45 | ||
| Very high intensity | 3 | 146 | 0 | Low | 0.82 | ||
| Temporal changes in frequency of decelerations | 8 | 373 | 0 | Low | 0.72 | ||
| High intensity | 5 | 227 | 53 | Moderate | 0.08 | ||
| Very high intensity | 3 | 146 | 34 | Moderate | 0.22 | ||
GPS global positioning system