| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 2190 | Njabulo MBATHA |
RSA
|
49.90 Q | 0.161 |
| 2 | 1790 | Sam LUNT |
GBR
|
50.00 Q NU20R | 0.151 |
| 3 | 1971 | Kyo KIKUTA |
JPN
|
51.04 | 0.158 |
| 4 | 2222 | Akalanka KUDA LIYANAGE |
SRI
|
51.45 | 0.185 |
| 5 | 2214 | Mitja ZUBIN |
SLO
|
52.55 | 0.184 |
| 6 | 1914 | Paolo BOLOGNESI |
ITA
|
53.92 | 0.163 |
| 7 | 2065 | Maximiliano NUÑEZ |
MEX
|
57.96 | 0.142 |
| 1698 | Joel VON DE AHÉ |
DEN
|
DNS |
| POS | BIB | ATHLETE | COUNTRY | MARK | ms* | Reaction Time |
|---|---|---|---|---|---|---|
| 1 | 1757 | Antti SAINIO |
FIN
|
49.36 Q WU20L | .351 | 0.172 |
| 2 | 1681 | Michal RADA |
CZE
|
49.36 Q WU20L | .352 | 0.163 |
| 3 | 2340 | Vance NILSSON |
USA
|
49.82 q | 0.212 | |
| 4 | 1709 | Joaquin ALONSO |
ESP
|
50.22 q NU20R | 0.195 | |
| 5 | 1901 | Fintan DEWHIRST |
IRL
|
51.65 | 0.165 | |
| 6 | 1900 | David DAVITT |
IRL
|
51.93 | 0.157 | |
| 7 | 2014 | Ali Abdulfattah ALRUMAYH |
KSA
|
52.25 PB | 0.175 | |
| 8 | 1963 | Trevoy SMITH |
JAM
|
54.24 | 0.171 |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 1966 | Daniel WRIGHT |
JAM
|
51.11 Q | 0.208 |
| 2 | 1626 | Ramón FUENZALIDA |
CHI
|
51.33 Q PB | 0.179 |
| 3 | 1967 | Kairi GONDA |
JPN
|
51.80 | 0.283 |
| 4 | 2059 | Jose Eduardo AGUADO |
MEX
|
52.57 | 0.137 |
| 5 | 1584 | Lucas DE ALMEIDA |
BRA
|
52.67 PB | 0.157 |
| 6 | 2360 | Premier WYNN |
USA
|
52.76 | 0.239 |
| 7 | 2283 | Cheyne WEST |
TTO
|
53.09 | 0.159 |
| 8 | 1637 | Jingwei GUO |
CHN
|
1:03.89 | 0.196 |