| Order / Lane | ATHLETE | COUNTRY | PB | SB 2006 | 
|---|---|---|---|---|
| 2 | Spain Junior |  ESP | 45.73 | 46.42 | 
| 3 | PR of China Junior |  CHN | 44.75 | 44.95 | 
| 4 | Finland Junior |  FIN | 44.40 | |
| 5 | Germany Junior |  GER | 43.91 | 44.84 | 
| 6 | Slovenia Junior |  SLO | 46.58 | 46.58 | 
| 7 | France Junior |  FRA | 43.68 | 46.00 | 
| 8 | Norway Junior |  NOR | 46.04 | 46.36 | 
| Order / Lane | ATHLETE | COUNTRY | PB | SB 2006 | 
|---|---|---|---|---|
| 2 | Belarus Junior |  BLR | ||
| 3 | South Africa Junior |  RSA | 45.07 | |
| 4 | United States Junior |  USA | 43.29 | 43.29 | 
| 5 | Bahamas Junior |  BAH | 45.00 | 45.27 | 
| 6 | Great Britain & N.I. Junior |  GBR | 44.16 | 45.25 | 
| 7 | Papua New Guinea Junior |  PNG | 48.03 | |
| 8 | Brazil Junior |  BRA | 45.09 | 45.39 | 
| Order / Lane | ATHLETE | COUNTRY | PB | SB 2006 | 
|---|---|---|---|---|
| 2 | Canada Junior |  CAN | 44.88 | 46.91 | 
| 3 | Jamaica Junior |  JAM | 43.40 | 44.74 | 
| 4 | Japan Junior |  JPN | 44.90 | 45.66 | 
| 5 | Poland Junior |  POL | 44.59 | 45.18 | 
| 6 | Russia Junior |  RUS | 44.70 | 46.21 | 
| 7 | Australia Junior |  AUS | 44.86 | |
| 8 | Italy Junior |  ITA | 44.72 |