i dont think creatine restores atp creatine serves primarily as an "energy buffer" for muscle cells, storing energy as a creatine phosphate reserve to be used when demand for muscle use increases above the typical range. creatine is synthesized by our bodies from the amino acid, glycine, & excess levels are not stored. However, utilization of the creatine phosphate energy charge produces creatinine as its by-product, which cannot be recharged & is completely cleared by the kidneys. So in those individuals who are rapidly building increased muscle mass &/or otherwise depleting their creatine phosphate energy reserves through heavy exercise, creatine is thought to be useful for maintaining the optimal levels within muscle cells without overloading the body's capacity for its biosynthesis. This can potentially help the muscles to prepare more rapidly for withstanding further exercise
