Testosterone plays a key role in sports, particularly in muscle growth, strength, recovery, and bone density. It enhances protein synthesis and can improve athletic performance. However, effects vary greatly depending on training status, nutrition, and genetics. A direct assessment of testosterone deficiency or excess cannot be made via DNA testing alone; blood measurements are required. MyBody-X does not offer specific testosterone diagnostics. Evidence for genetic influences on testosterone levels is moderate (GWAS). Caution: testosterone supplementation without medical supervision is risky and can cause serious side effects. For athletes, a holistic approach focusing on training, diet, and recovery is more important than isolated hormone optimization.
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