Dose-dependent effect of caffeine supplementation on judo-specific performance and training activity: a randomized placebo-controlled crossover trial

Table 5 Summary of comparisons between caffeine consumers and non-consumers among study participants in SJFT

Indicator	Baseline	3 mg/kg	6 mg/kg n = 22	9 mg/kg	Placebo
Total number of throws in SJFT
t	0.70	1.47	1.31	0.08	−0.23
P	0.49	0.16	0.21	0.94	0.82
d	0.30	0.63	0.56	0.03	−0.10
HR immediately after SJFT (HR_RA)
t	−1.80	−1.63	−0.52	−0.42	−1.83
P	0.09	0.12	0.61	0.68	0.08
d	−0.77	−0.70	−0.22	− 0.18	−0.78
HR 1 min after SJFT (HR_1minAF)
t^*	−1.94	−2.36	−0.99	−1.84	− 1.93
P	0.07	0.03	0.33	0.08	0.07
d	−0.83	−1.01	− 0.43	− 0.79	−0.83

Values are t-score (t), P-value and Cohen’s d. SJFT, Special Judo Fitness Test; HR, heart rate

ISSN: 1550-2783