GLOSSARY

ATP is a central free-energy transfer carrier for many cellular tasks.

ATP links energy transfer to cellular work and must be continually regenerated during activity. Existing stores do not sustain prolonged work; phosphocreatine, glycolysis and oxidative processes contribute to renewal. ADP and AMP belong to the adenylate network rather than being mere waste. One nucleotide's amount is not total food calories or stored fuel volume. Continuous turnover matters more than imagining a large isolated ATP tank powering an entire session.

ATP-to-ADP and ATP-to-AMP ratios inform local energy status but are different measures. Adenylate charge weights the different forms within the pool. Amounts and ratios depend on compartment and method; blood does not necessarily reveal all muscle conditions. Energy charge is not caffeine stimulation or subjective motivation and does not create an automatic supplement prescription. Interpret the biochemical measure within its cellular setting rather than equating every higher value with better performance.

High-energy phosphate refers to favorable net hydrolysis free energy in context. Breaking a bond alone requires energy; overall bond changes, product stabilization and environment determine the favorable reaction. ATP is not a packet yielding free energy merely by cutting any bond without accounting for the whole process. This distinction clarifies phosphate transfer and work while avoiding the misconception that a bond itself releases energy simply because it is broken.