| 51,32 sec Indoor | Sem Verwey Jongens U18 | 2016-02-28 Apeldoorn | |
|---|---|---|---|
| 51,77 sec Indoor | Bart van der Gragt Jongens U18 | 2003-02-15 Gent | |
| 53,42 sec Indoor | Bart van der Gragt Jongens U18 | 2003-01-26 Zuidbroek | |
| 56,93 sec Indoor | Michiel Bult Jongens U18 | 1995-01-14 Den Haag |