The Top 400m Sprinters 2025 and 2024 Best Marks Compared

Mark Stonecipher

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Every week during the 2025 Florida outdoor season, we will examine a different event. We'll compare the top 100 marks of 2025 to date with the athletes' best performances from 2024. See who has improved the most.

This week, we are examining the boys' and girls' 400m. To be included in the list, the athlete must be ranked in the top 100 of their event at the time of the comparison.

Click the links for the girls' and boys' 100m comparisons from 2025 to 2024.
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Boys 100m 2025 to 2024 Comparison

Girls 100m 2025 to 2024 Comparison