Common mistakes around Cortisol Training

Common mistakes around cortisol training often stem from overinterpreting genetic test results. Many believe that a single SNP (e.g., in the NR3C1 or FKBP5 genes) dictates their cortisol response, leading to rigid training protocols. In reality, cortisol regulation is highly polygenic and influenced by sleep, stress, nutrition, and training volume. Consumer DNA tests rarely provide actionable insights for cortisol management. Another mistake is ignoring the diurnal rhythm: training at the wrong time can exacerbate cortisol dysregulation. Also, focusing solely on lowering cortisol without considering its essential role in recovery and adaptation is counterproductive. Evidence for personalized cortisol training based on genetics is weak; most recommendations are mechanistic or derived from small studies. A conservative approach is to monitor subjective recovery, vary training intensity, and prioritize sleep and nutrition over genetic data.