Acute caffeine supplementation enhances several aspects of shot put performance in trained athletes

Figures & data

Table 1. Variables of CMJ, SJ and ballistic push up after the ingestion of 3 mg/kg/b.m. of caffeine or a placebo.

	CMJ			SJ			Push Up
	Placebo	Caffeine	ES	Placebo	Caffeine	ES	Placebo	Caffeine	ES
Jump height (imp-mom) [cm]	32.3 ± 7.6	33.8 ± 8.0*	0.82	29.9 ± 8.2	31.4 ± 7.5*	0.63	9.3 ± 4.5	12.7 ± 8.3	0.56
Peak velocity [m/s]	2.6 ± 0.3	2.7 ± 0.3*	0.67	2.5 ± 0.3	2.6 ± 0.3*	0.65	1.9 ± 0.3	2.1 ± 0.5	0.62
Peak power (W)	4496.2 ± 1384.5	4617.2 ± 1471.9*	0.70	4548.9 ± 1450.4	4631.7 ± 1377.9	0.33	1496.2 ± 453.4	1753 ± 683.3	0.70

Data is shown as mean SD. (*) Significant differences between caffeine and placebo at p < 0.05.

Figure 1. Individual responses for distance (m) during of the shot-put with different methods after the ingestion of 3 mg/kg/b.m. of caffeine or a placebo. Each line represents one individual from a sample of 13 individuals; continuous lines depict individuals who increased the caffeine distance with respect to placebo and the dashed line depicts the individual with decreased the caffeine distance with respect to placebo. (*) Significant differences between caffeine and placebo at p < 0.050.

Table 2. Prevalence of side-effects the hours after with the ingestion of caffeine or placebo. Data are % affirmative responses obtained from 10 trained athletes.

	Placebo (%)	Caffeine (%)	p
Nervousness	0.0	10.0	0.317
Gastrointestinal problems	10	20	0.317
Activeness	10	30	0.157
Irritable	10	0	0.317
Muscular pain	10	20	0.317
Headache	40	10	0.083
Increased urine production	10	10	1.000

Data is shown as % of affirmative responses. (*) Significant differences between caffeine and placebo at p < 0.05.