400m M/H, Heat:1 of 4 ; Official result
| Rank | Lane | ID | Name | PB | Team | Result | Info |
| 1 | 3 | 2335 | DUERINCK NILS | VAC | 47.55 | ||
| 2 | 5 | 1427 | DE WITTE LENNERT | RCG | 49.50 | ||
| 3 | 4 | 374 | DE BAETS JASPER | ACME | 49.69 | ||
| 4 | 7 | 1731 | VERHAEREN THIJS | VAC | 50.42 | ||
| 5 | 6 | 2163 | DOCQUIER RUBEN | LIER | 50.82 | ||
| 6 | 2 | 3100 | RAETS MICHAEL | RCB | 50.96 | ||
| 7 | 8 | 669 | SEVRIN MAXIME | SPA | 52.56 |