Table 3.

Estimated body composition by group.

Variable	Creatine (n = 11)		Placebo (n = 12)		P-value for time effect	P-value for group effect	P-value for group by time interaction effect	Effect size (ηp2)
	Baseline	Post	Baseline	Post
Body mass (kg)	65.8 ± 7.0	66.2 ± 6.6	65.6 ± 6.0	66.5 ± 5.7	0.001	0.981	0.173	0.087
Fat mass (kg)	5.4 ± 2.1	5.2 ± 1.9	6.6 ± 1.9	6.0 ± 1.6	0.015	0.209	0.149	0.096
Fat-free mass (kg)	60.1 ± 6.2	59.9 ± 6.6	59.7 ± 4.7	59.8 ± 5.2	0.662	0.933	0.496	0.022
Muscle mass (kg)	34.5 ± 3.3	34.3 ± 3.6	33.9 ± 2.9	33.9 ± 3.3	0.481	0.707	0.561	0.016
Total body water (%)	44.2 ± 4.2	44.5 ± 4.4	43.7 ± 3.3	43.8 ± 3.7	0.210	0.710	0.388	0.044

Data are shown as mean ± SD.