Most Improved Illinois Boys 400m Marks Compared to 2025

MileSplit Staff
MileSplit PRO

See the rest of this article

Access the complete article with MileSplit PRO.

Subscribe to keep reading

Improvement Rankings: Top Illinois Boys 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 -7.10 2029 1:08.24 1:01.14
2 -6.61 2027 1:08.39 1:01.78
3 -6.53 2029 1:02.94 56.41
4 -6.51 2029 1:16.14 1:09.63
5 -6.50 2027 1:08.34 1:01.84
6 -6.10