| for sustained maximal endurance exercise | 11 | purpose |
| on sprint performance | 6 | other |
| with these effects | 6 | other |
| caffeine → be → ergogenic | 19 |
| caffeine → have → ergogenic effect | 10 |
| caffeine → exert → greater ergogenic effect | 6 |
| caffeine → have → ergogenic effects | 3 |
| negative | neutral | positive |
| 0.070 | 0.497 | 0.433 |
| Raw frequency | 38 |
| Normalized frequency | 0.422 |
| Modifier score | 0.500 |
| Perplexity | 41.659 |