Is CYP2C19 useful for Sport?

The provided context contains no direct evidence that CYP2C19 is useful for sport. CYP2C19 is a drug-metabolizing enzyme (e.g., clopidogrel), not directly linked to athletic performance. Some studies explore variants in relation to injury risk or medication response in athletes, but evidence is weak and inconsistent. Without specific, validated studies in the context, any claim remains speculative. Athletic performance is multifactorial; genetics plays a minor role. A CYP2C19 test for sport is not recommended without a medical indication.