The role of lowering cortisol in sports is nuanced. Cortisol is a key stress hormone that rises during intense exercise to mobilize energy and modulate inflammation. While acute elevations are normal and even beneficial for performance, chronically high cortisol—due to overtraining, poor sleep, or psychological stress—can impair recovery, promote muscle breakdown, and weaken immune function. Therefore, strategies to lower cortisol (e.g., adequate recovery, sleep optimization, balanced nutrition with magnesium and omega-3s, stress management) may support recovery and long-term athletic performance. However, the evidence for direct performance enhancement from cortisol reduction in healthy athletes is moderate at best. Most consumer tests claiming to measure cortisol (saliva, blood, or genetic) lack clinical validation for sports contexts. Athletes should focus on holistic recovery rather than single biomarkers. The effect sizes are small, and lifestyle factors dominate. Always consult a sports medicine professional before making drastic changes based on cortisol levels.
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