Table 1.

Scores obtained for the different profile of mood states (POMS) scales for the two experimental conditions (caffeine, placebo).

Scheme	Caffeine	Placebo	Mean Difference (%)	p	ES
Tension *	6.80 ± 5.78	3.60 ± 2.90	+88.9	0.004	0.72
Depression	1.20 ± 1.52	1.47 ± 3.09	−18.4	0.565	0.11
Anger	2.27 ± 2.81	1.27 ± 2.31	+78.7	0.088	0.40
Vigor *	13.20 ± 3.23	11.87 ± 3.04	+11.2	0.010	0.44
Fatigue	2.93 ± 2.04	3.53 ± 3.44	−17.0	0.476	0.19
Confusion	12.93 ± 4.08	13.27 ± 2.69	−2.6	0.690	0.10

Data are provided as the mean ± standard deviation. * Significant difference between caffeine and placebo (p < 0.05).