MileSplit Staff Apr 24, 2026 PRO See the rest of this article Access the complete article with MileSplit PRO. Subscribe to keep reading Already a subscriber? Log in. Improvement Rankings: Top Kentucky Girls 400m marks compared to their season’s best performances from 2025. Most Improved - 400 Meter Dash Comparing 2026 season to 2025 season Rank Improved Athlete/Team Class 2025 PR 2026 PR 1 -16.64 Shyla Haverstick Christian County 2028 1:25.77 1:09.13 2 -13.76 Crystal Chesser Hart County 2027 1:34.43 1:20.67 3 -10.15 Ja'Lynn Sanderson Pleasure Ridge Park 2026 1:16.46 1:06.31 4 -10.05 Zoe Hart Corbin 2028 1:23.54 1:13.49 5 -9.53 Taniyah Hayden Madison Central 2027 1:15.17 1:05.64 6 -9.39 Kaydee Horseman Anders...