Can TSH help with Sport?

TSH (thyroid-stimulating hormone) is not a direct sports aid but a clinical marker of thyroid function. Proper thyroid function is essential for energy metabolism, cardiovascular performance, and muscle recovery in both endurance and strength sports. Low TSH (hyperthyroidism) can increase basal metabolic rate, cause muscle wasting, and arrhythmias; high TSH (hypothyroidism) leads to fatigue, weight gain, and reduced performance. However, TSH alone is not a performance predictor – free T3 and T4 are more direct. MyBodyMax tests typically analyze genes, not hormones. TSH testing belongs to clinical lab diagnostics and should only be done under medical indication. Using TSH to optimize sport without medical supervision is not evidence-based and potentially risky. Evidence: mechanistic, no direct sport study in context.