Effects of acute caffeine, theanine and tyrosine supplementation on mental and physical performance in athletes

Table 1 Subjective variables from the VAS scale

	Condition	Δ (T2-T1)	Δ (T3-T1)	Δ (T4-T1)	p (group)	p (time)	p (interaction)
Energy	PL	0.77 ± 0.21	−1.56 ± 0.37	−2.25 ± 0.49	0.33	< 0.001*	0.85
Energy	SUP	0.49 ± 0.17	− 1.64 ± 0.28	− 2.72 ± 0.43	0.33	< 0.001*	0.85
Focus	PL	0.61 ± 0.24	− 0.93 ± 0.30	−1.64 ± 0.43	0.31	< 0.001*	0.89
Focus	SUP	0.49 ± 0.19	−1.25 ± 0.39	−2.12 ± 0.55	0.31	< 0.001*	0.89
Concentration	PL	0.59 ± 0.25	−0.82 ± 0.33	− 1.54 ± 0.47	0.19	< 0.001*	0.69
Concentration	SUP	0.56 ± 0.18	−1.33 ± 0.30	− 2.14 ± 0.49	0.19	< 0.001*	0.69
Alertness	PL	0.58 ± 0.29	− 0.80 ± 0.27	− 1.33 ± 0.45	0.53	< 0.001*	0.76
Alertness	SUP	0.59 ± 0.26	−0.87 ± 0.30	− 1.80 ± 0.49	0.53	< 0.001*	0.76
Fatigue	PL	−0.10 ± 0.19	1.04 ± 0.44	1.24 ± 0.76	0.92	0.09	0.96
Fatigue	SUP	0.06 ± 0.50	0.89 ± 0.55	1.10 ± 0.77	0.92	0.09	0.96
Motivation	PL	0.27 ± 0.23	−1.15 ± 0.35	−2.52 ± 0.52	0.71	< 0.001*	0.89
Motivation	SUP	0.49 ± 0.22	−1.25 ± 0.39	−2.28 ± 0.50	0.71	< 0.001*	0.89

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