The effects of a high dosage of creatine and caffeine supplementation on the lean body mass composition of rats submitted to vertical jumping training

Table 3 Urinary creatinine.

Groups	1^st Week (mg/24 h.g)	2^nd Week (mg/24 h.g)	6^th Week (mg/24 h.g)
SPl (n = 10)	0.243 ± 0.082	0.217 ± 0.034^a	0.240 ± 0.047
SCr (n = 10)	0.226 ± 0.038	0.284 ± 0.033^A	0.255 ± 0.036
SCaf (n = 10)	0.234 ± 0.027	0.208 ± 0.030^a	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 ± 0.040^c	0.223 ± 0.018
ECr (n = 07)	0.240 ± 0.050	0.301 ± 0.044^A	0.252 ± 0.015^Bd
ECaf (n = 08)	0.226 ± 0.023	0.208 ± 0.027^c	0.204 ± 0.021
ECrCaf (n = 09)	0.259 ± 0.014	0.288 ± 0.051^bd	0.263 ± 0.026^d
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 ± 0.030^B
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 ± 0.039^Aef	0.253 ± 0.027^Bf
Caffeine (n = 18)	0.231 ± 0.025	0.208 ± 0.028^A	0.207 ± 0.026^A
Creatine+Caffeine (n = 18)	0.250 ± 0.025	0.267 ± 0.059^ef	0.248 ± 0.033^f

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.

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