| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | USA | United States Junior |
USA
|
44.03 Q WJL | 0.172 |
| 2 | BRA | Brazil Junior |
BRA
|
44.61 Q SB | 0.149 |
| 3 | GER | Germany Junior |
GER
|
44.87 q | 0.180 |
| 4 | BAH | Bahamas Junior |
BAH
|
45.22 q SB | 0.202 |
| 5 | RSA | South Africa Junior |
RSA
|
46.25 SB | 0.301 |
| FRA | France Junior |
FRA
|
DNF | 0.198 |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | JAM | Jamaica Junior |
JAM
|
44.22 Q | 0.182 |
| 2 | SUI | Switzerland Junior |
SUI
|
45.17 Q SB | 0.177 |
| 3 | NED | Netherlands Junior |
NED
|
45.29 | 0.169 |
| 4 | NGR | Nigeria Junior |
NGR
|
45.93 | 0.197 |
| CAN | Canada Junior |
CAN
|
DNF | 0.159 | |
| BAR | Barbados Junior |
BAR
|
DNS |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | TTO | Trinidad and Tobago Junior |
TTO
|
44.68 Q | 0.183 |
| 2 | JPN | Japan Junior |
JPN
|
45.38 Q SB | 0.143 |
| 3 | AUS | Australia Junior |
AUS
|
45.54 | 0.181 |
| CYP | Cyprus U20 |
CYP
|
DQ R170.7 | 0.165 | |
| GBR | Great Britain & N.I. Junior |
GBR
|
DNF | 0.205 | |
| POL | Poland Junior |
POL
|
DNF | 0.169 |