| Order / Lane | ATHLETE | COUNTRY | PB | SB 2008 | 
|---|---|---|---|---|
| 2 | France Junior |  FRA | 39.33 | 40.88 | 
| 3 | Thailand Junior |  THA | 39.66 | 40.31 | 
| 4 | Poland Junior |  POL | 39.61 | 40.91 | 
| 5 | Japan Junior |  JPN | 39.30 | 40.17 | 
| 6 | Great Britain & N.I. Junior |  GBR | 39.05 | |
| 7 | Turkey Junior |  TUR | 42.25 | |
| 8 | Italy Junior |  ITA | 39.61 | 40.79 | 
| Order / Lane | ATHLETE | COUNTRY | PB | SB 2008 | 
|---|---|---|---|---|
| 2 | Chinese Taipei Junior |  TPE | 40.33 | 40.39 | 
| 3 | Czech Republic Junior |  CZE | 40.60 | 41.15 | 
| 4 | Jamaica Junior |  JAM | 39.05 | 39.80 | 
| 5 | Nigeria Junior |  NGR | 39.54 | |
| 6 | Germany Junior |  GER | 39.25 | 40.39 | 
| 7 | Sweden Junior |  SWE | 40.10 | 41.12 | 
| 8 | Canada Junior |  CAN | 39.64 | 
| Order / Lane | ATHLETE | COUNTRY | PB | SB 2008 | 
|---|---|---|---|---|
| 2 | Senegal Junior |  SEN | 42.6 | |
| 3 | Trinidad and Tobago Junior |  TTO | 39.17 | 40.68 | 
| 4 | Spain Junior |  ESP | 40.03 | 40.38 | 
| 5 | Russia Junior |  RUS | 40.03 | |
| 6 | South Africa Junior |  RSA | 40.16 | 40.16 | 
| 7 | Austria Junior |  AUT | 40.70 | |
| 8 | United States Junior |  USA | 38.66 | 40.26 |