| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Jamaica Junior |
JAM
|
39.74 Q WJL | 0.188 |
| 2 | Trinidad and Tobago Junior |
TTO
|
39.88 Q | 0.160 |
| 3 | France Junior |
FRA
|
40.11 | 0.208 |
| 4 | South Africa Junior |
RSA
|
40.32 SB | 0.187 |
| 5 | Canada Junior |
CAN
|
40.38 SB | 0.153 |
| Czech Republic Junior |
CZE
|
DNF | 0.163 | |
| Saudi Arabia Junior |
KSA
|
DNF | 0.145 |
| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | United States Junior |
USA
|
39.69 Q WJL | 0.157 |
| 2 | Nigeria Junior |
NGR
|
39.95 Q SB | 0.203 |
| 3 | Thailand Junior |
THA
|
40.00 q | 0.191 |
| 4 | Poland Junior |
POL
|
40.24 | 0.204 |
| 5 | Belgium Junior |
BEL
|
40.43 | 0.189 |
| 6 | Bahamas Junior |
BAH
|
40.58 SB | 0.161 |
| Australia Junior |
AUS
|
DNF | 0.191 |
| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Japan Junior |
JPN
|
40.04 Q SB | 0.172 |
| 2 | Germany Junior |
GER
|
40.06 Q | 0.199 |
| 3 | Great Britain & N.I. Junior |
GBR
|
40.07 q | 0.143 |
| 4 | Brazil Junior |
BRA
|
40.56 SB | 0.176 |
| 5 | Spain Junior |
ESP
|
40.82 | 0.154 |
| 6 | Zimbabwe Junior |
ZIM
|
42.21 PB | 0.180 |
| 7 | Bahrain Junior |
BRN
|
42.93 PB | 0.213 |