400 meter National AC Men, Heat:1 of 5 ; Official result since 19:10
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 4 | 542 | SCHYNS ALEXANDRE | SER | Sch | 55.68 | |||
| 2 | 5 | 598 | BAUTERS LAURENS | ADD | Sch | 57.84 | |||
| 3 | 2 | 541 | REGIMONT THOMAS | RFCL | Cad | 58.68 | |||
| 4 | 3 | 599 | DEGEIMBRE MARTIN | ARCH | Cad | 59.30 | |||
| 5 | 6 | 605 | THIBAUD DENIS | HERV | Jun | 59.40 | |||
| 6 | 7 | 600 | GILLES BARTSCH | SER | Cad | 64.23 |