Figure 1
From: Life-long sports engagement enhances adult erythrocyte adenylate energetics

Relationships between age and erythrocyte concentration of ATP, ADP, and AMP at rest (a, b, c) in endurance runners (open triangle, dashed lines; n = 86), sprinters (filled square, solid lines; n = 58) and controls (open circle, dotted lines; n = 62). ATP adenosine-5′-triphosphate, ADP adenosine-5′-diphosphate, AMP adenosine-5′-monophosphate, rest resting value.