Table 3.

Urinary creatinine.

Groups	1st Week (mg/24 h.g)	2nd Week (mg/24 h.g)	6th Week (mg/24 h.g)
SPl (n = 10)	0.243 ± 0.082	0.217 ± 0.034a	0.240 ± 0.047
SCr (n = 10)	0.226 ± 0.038	0.284 ± 0.033A	0.255 ± 0.036
SCaf (n = 10)	0.234 ± 0.027	0.208 ± 0.030a	0.211 ± 0.030
SCrCaf (n = 09)	0.242 ± 0.020	0.245 ± 0.060	0.234 ± 0.011
EPl (n = 09)	0.231 ± 0.023	0.223 ± 0.040c	0.223 ± 0.018
ECr (n = 07)	0.240 ± 0.050	0.301 ± 0.044A	0.252 ± 0.015Bd
ECaf (n = 08)	0.226 ± 0.023	0.208 ± 0.027c	0.204 ± 0.021
ECrCaf (n = 09)	0.259 ± 0.014	0.288 ± 0.051bd	0.263 ± 0.026d
Exercise Factor
Sedentary (n = 39)	0.236 ± 0.046	0.238 ± 0.049	0.235 ± 0.040
Exercised (n = 33)	0.240 ± 0.032	0.258 ± 0.057	0.236 ± 0.030B
Supplementation Factor
Placebo (n = 19)	0.236 ± 0.058	0.220 ± 0.036	0.232 ± 0.036
Creatine (n = 17)	0.233 ± 0.044	0.293 ± 0.039Aef	0.253 ± 0.027Bf
Caffeine (n = 18)	0.231 ± 0.025	0.208 ± 0.028A	0.207 ± 0.026A
Creatine+Caffeine (n = 18)	0.250 ± 0.025	0.267 ± 0.059ef	0.248 ± 0.033f

Data are mean ± SD. n, number of animals. Statistical significance (P < 0.05): ^A vs. 1^st week; ^B vs. 2^nd week (ANOVA Repeated Measures) for the same line. ^a vs. SCr; ^b vs. EPl; ^c vs. ECr; ^d vs. ECaf; ^e vs. Placebo; ^f vs. Caffeine (Tukey Test) for the same week. SPl, Sedentary placebo. SCr, sedentary creatine. SCaf, sedentary caffeine. SCrCaf, sedentary creatine plus caffeine. EPl, exercised placebo. ECr, exercised creatine. ECaf, exercised caffeine. ECrCaf, exercised creatine plus caffeine.