Can HbA1c help with Sport?

HbA1c is a long-term marker of average blood glucose over 2–3 months. In sports, it can be useful for athletes with diabetes or prediabetes to monitor glycemic control. For healthy athletes without metabolic issues, HbA1c is not a direct performance metric. The provided context lacks specific evidence linking HbA1c to sport performance. Therefore, the evidence is unclear. A normal HbA1c (<5.7%) indicates good glucose regulation, which may support endurance and recovery. However, athletes should not rely solely on HbA1c; factors like training load, nutrition, and sleep are more relevant. Be cautious of overblown claims from genetic or biomarker tests without solid scientific backing.