Table 2.

Comparative analyses of high energy phosphate levels in younger and older adults prior to and following creatine supplementation

Variable	Young baseline†‡	Old baseline†‡	Significance	Theoretical results in young following supplementation	Theoretical results in old following supplementation	Potential statistical impact
TCr	124.6 ± 2.7	129.8 ± 4.0	< 0.001§	151.6 ± 2.7	149.1 ± 4.1	0.005 *
PCr	78.2 ± 2.3	78.4 ± 4.1	0.66	88.6 ± 2.3	84.8 ± 4.2	< 0.001 *
Cr	46.0 ± 2.3	51.4 ± 3.8	< 0.001§	64.1 ± 2.3	65.8 ± 3.9	0.03 *
ATP	24.0 ± 0.6	20.0 ± 0.6	< 0.001§	25.0 ± 0.61	21.4 ± 0.61	< 0.001 *

Baseline and theoretical values are presented as mean ± pooled S.E. values and were derived from Table 1.

TCr = Total creatine

PCr = Phosphocreatine

Cr = Creatine

ATP = Adenosine triphosphate

^† Younger participants were between the ages of 18-36 years old, whereas older participants were between the ages of 52-79 years old.

^‡ All of the referenced interventions supplemented subjects either through a loading phase (i.e., 20 g/d for 5 days) or through a 14-to-24 week supplementation protocol using 5 g/d.

§= Significant difference between young and old, p < 0.05.

* = Signifies a theoretical significant difference between young and old, p < 0.05.