Can COMT help with Sport?

Whether COMT (catechol-O-methyltransferase) can help with sport is not clearly established. COMT degrades dopamine; the well-studied Val158Met variant (rs4680) alters enzyme activity. Carriers of the slower Met variant have higher baseline dopamine, which could theoretically influence motivation, pain tolerance, and cognitive performance under exertion. Some small studies suggest links to endurance or recovery, but effects are modest and inconsistent. The evidence is mostly mechanistic and lacks large-scale replication. COMT's influence is also dwarfed by other genetic (e.g., BDNF, DRD2) and environmental factors (training, nutrition, sleep). Therefore, a single COMT test is insufficient for personalized training advice. Athletes should focus on proven principles: progressive overload, recovery, and nutrition. In summary, COMT may play a minor modulatory role, but it is not a reliable lever for improving sport performance.