Table 2 Subject characteristics.

	Creatine (n = 24)		Placebo (n = 12)		p Value
	Mean	SD	Mean	SD
Anthropometrics
Height (cm)	182.2	5.6	181.8	6.9	0.83
Age (years)	22.5	4.9	22.8	4.8	0.90
Body weight (kg)	73.9	8.5	74.6	7.9	0.82
Fat percentage (%)	10.3	2.5	11.6	3.2	0.18
V̇o2max (ml/kg/min)	52.3	5.8	53.2	5.4	0.65
Maximum power (W)	351.5	42.7	372.9	56.9	0.21
Maximum power (W/kg)	4.8	0.6	5.0	0.5	0.32
Urine chemistry
PH	7.0	0.7	6.3	0.7	0.02*
Density (kg/l)	1.02	0.01	1.02	0.01	0.18
Creatine (μmol/l)†	Bdl		bdl
Strength test
Bench press (newton, mean)	597	126	569	199	0.62
Bench press (newton, best)	651	158	618	212	0.60
Leg press (newton, mean)	4373	994	3797	857	0.11
Leg press (newton, best)	4688	1083	4191	953	0.20
Sprint test
5 m sprint time (s)	1.01	0.04	1.00	0.05	0.79
10 m sprint time (s)	1.79	0.06	1.78	0.08	0.76
20 m sprint time (s)	3.14	0.10	3.15	0.14	0.96
Serum lactate pre (mmol/l)	2.1	0.6	2.1	0.8	0.96
Serum lactate post (mmol/l)	7.1	2.2	6.4	2.5	0.44
RPE post	17	2	16	2	0.065
Tennis test
Service (km/h, mean)	167	10	170	15	0.38
Service (km/h, best)	173	10	177	16	0.38
Forehand (km/h, mean)	124	10	127	98	0.33
Forehand (km/h, best)	137	10	142	10	0.21
Backhand (km/h, mean)	117	7	120	10	0.22
Backhand (km/h, best)	133	8	138	12	0.13
Serum lactate pre (mmol/l)	3.2	1.1	3.5	1.2	0.47
Serum lactate post (mmol/l)	6.3	2.6	5.7	2.4	0.54
Heart rate (beats/min)	180	9	179	9	0.60
RPE post	15	3	14	1	0.29

*p<0.05.

†Data given for the median score at baseline per supplement group (bdl, median score lies below detection levels (<0.23 mmol/l)).

RPE, rate of perceived exertion.