| Heat 1 |
| Rank | Name / Club | Nat | Result | ||||
|---|---|---|---|---|---|---|---|
| 1 | Joel Turkka Tampereen Pyrintö |
 FIN |
49,20 | ||||
| 2 | Samuli Losoi Tampereen Pyrintö |
FIN |
50,60 | ||||
| 3 | Mikko Ryhänen Lappeenrannan Urheilu-Miehet |
FIN |
50,99 |
Results by:
| Events and timetable | Start list |
M 400 m National Race B