GLOSSARY

Hormonal Control of Glycogenolysis coordinates glycogen mobilization with tissue demand through hormones.

Glycogenesis builds glycogen and glycogenolysis releases its units within dynamic regulation. Phosphorylated products and their route to usable glucose matter. Stores depend on diet, exercise and tissue state, not one meal's volume alone. A high post-exercise synthesis rate does not imply unlimited storage or permanent overeating. Recovery should match the next planned task, with breakdown, synthesis and net storage distinguished rather than treating every glycogen-related term as a separate nutrient requirement.

Liver glycogen helps maintain blood glucose, while muscle glycogen mainly serves the muscle holding it. Muscle does not ordinarily export free glycogen-derived glucose like liver, though other exchanged metabolites contribute indirectly. Blood glucose alone therefore does not quantify a muscle's depletion. Intensity and recruited muscles determine local-store relevance for the next session. Whole-body carbohydrate intake and tissue-specific availability are connected but not interchangeable measures.

For practical use, record meal and training timing, sleep and hunger alongside actual intake and performance trends. When a marker changes, first examine measurement conditions and plausible explanations; food decisions should support adequate supply, tolerance and recovery rather than ending the assessment at one molecular signal or assuming a concentration change automatically establishes a useful intervention.

Insulin is secreted by pancreatic beta cells and coordinates nutrient use and storage rather than simply being a fat-making hormone. Important effects include muscle and adipose glucose uptake, suppression of hepatic glucose production and regulation of lipolysis. Not every cell needs insulin for glucose entry. Postmeal concentrations vary with meal composition, tissue sensitivity and clearance, so one insulin excursion cannot determine overall dietary quality or an athlete's nutritional needs.

Glucagon is mainly secreted by alpha cells and supports glucose availability, prominently through the liver. Its response is not simply the inverse of insulin: amino acids and meal type matter, and both can rise after protein. Direct skeletal-muscle effects should not be assumed equivalent to hepatic effects. Their ratio is context-dependent rather than a food-quality score, and changes need secretion, clearance and tissue actions considered together.

Exercise mode, intensity, duration, recruited muscle, training history and prior food influence hormonal responses. Acute changes differ from baseline adaptations after training. Higher concentration does not necessarily mean greater secretion or tissue effect, because clearance, plasma volume and receptors also matter. Performance develops through combined adaptations, so targeting a hormone peak is not sufficient for session design or supplement selection; actual recovery and performance must remain part of evaluation.

Carbohydrate, protein and fat have different digestive and signaling routes that interact in mixed meals. Protein can stimulate both insulin and glucagon; insulin is not simply an added-sugar marker. Fat and fiber can shift timing through gastric-emptying effects. Program quality depends on energy, nutrients, tolerance and fit with training rather than producing the lowest possible hormonal response after every meal or treating physiological insulin secretion as inherently undesirable.