Intramuscular phosphorylcreatine content was not significantly different between creatine and placebo before or after the intervention ( creatine-Pre : 20.5 2.6 , Post : 20.4 4.1 , placebo-Pre : 19.8 2.0 ; Post : 20.2 3.2 mmol/kg wet muscle ; p = 0.70 for interaction between conditions ) .