| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Great Britain & N.I. Junior |
GBR
|
39.84 Q SB | 0.166 |
| 2 | Japan Junior |
JPN
|
39.95 Q SB | 0.150 |
| 3 | Thailand Junior |
THA
|
40.16 q SB | 0.156 |
| 4 | Italy Junior |
ITA
|
40.41 SB | 0.296 |
| 5 | Poland Junior |
POL
|
40.61 SB | 0.132 |
| 6 | France Junior |
FRA
|
40.83 SB | 0.236 |
| 7 | Turkey Junior |
TUR
|
41.65 NJ | 0.207 |
| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Jamaica Junior |
JAM
|
39.62 Q WJL | 0.175 |
| 2 | Chinese Taipei Junior |
TPE
|
40.16 Q NJ | 0.163 |
| 3 | Czech Republic Junior |
CZE
|
40.60 NJ | 0.157 |
| 4 | Sweden Junior |
SWE
|
40.72 SB | 0.179 |
| 5 | Nigeria Junior |
NGR
|
40.74 SB | 0.191 |
| 6 | Canada Junior |
CAN
|
41.33 SB | 0.165 |
| Germany Junior |
GER
|
DNF | 0.205 |
| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | United States Junior |
USA
|
39.37 Q WJL | 0.175 |
| 2 | South Africa Junior |
RSA
|
39.59 Q NJ | 0.160 |
| 3 | Trinidad and Tobago Junior |
TTO
|
40.40 q SB | 0.161 |
| 4 | Russia Junior |
RUS
|
40.43 SB | 0.126 |
| 5 | Austria Junior |
AUT
|
40.80 SB | 0.131 |
| 6 | Senegal Junior |
SEN
|
42.44 NJ | 0.188 |
| Spain Junior |
ESP
|
DNF | 0.156 |