Table 2 Mean (± SD) isometric knee flexor and extensor strength parameters for caffeine (CAFF) and placebo (PLA) trials before, during and after the 90-min intermittent exercise protocol (n = 10)
From: The influence of caffeine ingestion on strength and power performance in female team-sport players
Average torque (Nm) | Sample time | Cohen’s d (Trial Mean) | Statistical significance (P values) | ||||||
|---|---|---|---|---|---|---|---|---|---|
Pre | Mid | Post | ~ 12 h post | Trial Mean | Treatment | Time | Treatment x Time | ||
Isometric knee flexor | |||||||||
PLA | 77.6 ± 18.6 | 77.0 ± 16.9 | 76.3 ± 17.5 | 76.1 ± 19.1 | 76.7 ± 17.3 | 0.18 | 0.143 | 0.981 | 0.841 |
CAFF | 77.9 ± 18.3 | 79.9 ± 24.9 | 81.7 ± 17.0 | 80.8 ± 22.4 | 80.1 ± 20.1 | ||||
Isometric knee extensor | |||||||||
PLA | 157.4 ± 40.8 | 155.3 ± 38.9 | 156.1 ± 35.1 | 154.2 ± 42.3 | 155.7 ± 37.8 | 0.04 | 0.837 | 0.845 | 0.657 |
CAFF | 153.6 ± 47.7 | 151.8 ± 30.0 | 159.9 ± 44.0 | 164.6 ± 48.9 | 157.4 ± 42.0 | ||||