LEA-Induced Thyroid and Metabolic Adaptations
Lifespan Endocrinology and Energy Deficiency in Sport
LEA-Induced Thyroid and Metabolic Adaptations
Low energy availability can reduce circulating T3 and alter metabolic regulation as part of energy conservation.
Development changes the reference
Hormonal patterns vary with gestation, childhood, puberty, adulthood and aging. Appropriate interpretation considers developmental stage and physiological context. A value typical of one stage can be inappropriate in another, without implying that higher hormone concentrations are always preferable.
A distinction that matters
These changes require context and should not automatically be classified as primary thyroid-gland failure.
Energy and reproductive function
Sustained low energy availability can alter metabolic and reproductive regulation. Symptoms and endocrine findings require assessment of other causes as well. Restoring adequate availability is central when deficiency is contributing, but the recovery time course differs among individuals and tissues.
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