GLOSSARY

Growth Hormone Response is growth-hormone change after a defined stimulus.

Growth hormone is pulsatile and varies with sleep, food and activity; IGF-1 and its binding proteins add further layers. A brief rise in supposedly anabolic hormones after a session does not determine future muscle growth. Normal hormonal roles are not equivalent to prescribed or pharmacological exposure. For athletes, training progress, adequate intake and recovery provide more practical information than pursuing a hormone peak or interpreting one acute endocrine response as hypertrophy.

Sex hormones function in all people, with patterns varying by biological sex, age, cycle, medicines and energy state. Free and total concentrations differ, and binding proteins affect interpretation. The reproductive axis is sensitive to insufficient energy; menstrual disruption or persistently reduced sexual function should not simply be considered normal heavy-training effects. Diagnosis requires symptoms and appropriate testing rather than comparing one number with a teammate or using an arbitrary athletic target.

AMPK, mTOR and related pathways integrate energy, amino-acid and other information; these proteins are not circulating hormones themselves. Components have different roles and tissue-dependent responses. A brief rise in an anabolic marker is not equivalent to guaranteed muscle gain. Effective training, adequate energy and protein and recovery opportunity are needed alongside molecular signaling for real outcomes rather than judging success from pathway activation alone.

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.

Low energy availability means insufficient energy remains after exercise for required bodily functions; it is not synonymous with low carbohydrate or weight loss alone. Problematic exposure can affect reproductive, thyroid, bone and appetite systems with variable patterns. Restoring supply and reviewing training load are central to assessment. One normal hormone or a universal numerical cutoff cannot confirm or exclude every case, so symptoms, history and clinical evaluation must be integrated.

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.

Hormonal imbalance is a broad description rather than a standalone diagnosis from an online symptom list. Deficiency, excess and resistance differ, and reference ranges depend on method, age and conditions. Medicines, illness, sleep and energy status also matter. Persistent symptoms need appropriate assessment to identify causes; choosing supplements or manipulating hormones from one isolated test cannot replace evidence-based evaluation or establish a universal athletic hormone target.