Table 3 Mean (± SD) counter-movement jump (CMJ) and estimated power 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
Sample time | Cohen’s d (Trial Mean) | Statistical significance (P values) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pre | Block 1 | Block 2 | Block 3 | Block 4 | Block 5 | Block 6 | ~12 h post | Trial Mean | Treatment | Time | Treatment x Time | ||
CMJ Height (cm) | |||||||||||||
PLA | 38.4 | 40.8 | 40.5 | 40.7 | 41.6 | 39.9 | 39.4 | 36.2 | 39.7 | 0.08 | 0.582 | <0.001 | 0.951 |
± 4.4 | ± 5.8 | ± 5.7 | ± 6.3 | ± 7.0 | ± 5.4 | ± 6.0 | ± 4.5 | ± 5.7 | |||||
CAFF | 38.5 | 41.6 | 40.8 | 41.0 | 41.0 | 39.8 | 40.5 | 37.2 | 40.1 | ||||
± 5.5 | ± 4.7 | ± 4.1 | ± 5.4 | ± 4.3 | ± 4.0 | ± 4.2 | ± 4.9 | ± 4.7 | |||||
Estimated CMJ Power (Watts) | |||||||||||||
PLA | 2976.1 | 3123.0 | 3105.7 | 3116.4 | 3168.9 | 3067.1 | 3039.4 | 2843.5 | 3055.0 | 0.09 | 0.391 | <0.001 | 0.950 |
± 339.2 | ± 412.0 | ± 414.2 | ± 452.5 | ± 477.6 | ± 363.1 | ± 463.9 | ± 332.2 | ± 403.7 | |||||
CAFF | 2996.2 | 3182.7 | 3136.5 | 3144.2 | 3148.8 | 3075.2 | 3116.7 | 2914.5 | 3089.3 | ||||
± 377.8 | ± 354.1 | ± 305.9 | ± 377.2 | ± 314.8 | ± 278.5 | ± 321.0 | ± 372.8 | ± 390.8 | |||||