400 m, Men
| Competition | 2010 South American Athletics U23 Championships |
|---|---|
| Venue |
Medellin
 COL
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Omar Longart |  VEN |
46.09 | ||
| 🥈 | Hederson Estefani |  BRA |
46.85 | ||
| 🥉 | Helder Alves | BRA |
47.40 |