How Lab Markers Reveal Underfueling
Underfueling & Low Energy Availability: How RMR, Cortisol, Iron, and Reverse T3 Expose Metabolic Stress Understanding Low Energy Availability (LEA) and Underfueling Underfueling — also known as Low Energy Availability (LEA) — is one of the most overlooked causes of: Persistent fatigue Plateaued performance Hormonal disruption Thyroid suppression Frequent injuries Chronic soreness and slow recovery…

