2008 World Junior Championships in Athletics – Men's 400 metres explained

The men's 400 metres event at the 2008 World Junior Championships in Athletics was held in Bydgoszcz, Poland, at Zawisza Stadium on 8, 9 and 10 July.

Medalists

Gold	Marcus Boyd
Silver	Kirani James
Bronze	O'Neal Wilder

Results

Final

10 July

Rank	Name	Nationality	Time	Notes
	align=left		align=left		45.53
	align=left		align=left		45.70
	align=left		align=left		45.76
4	align=left		align=left		46.54
5	align=left		align=left		46.78
6	align=left		align=left		47.20
7	align=left		align=left		47.81
	align=left		align=left		DQ	IAAF rule 163.3

Semifinals

9 July

Semifinal 1

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.55	Q
2	align=left		align=left		46.88	Q
3	align=left		align=left		47.22
4	align=left		align=left		47.43
5	align=left		align=left		47.51
6	align=left		align=left		48.21
7	align=left		align=left		48.30
8	align=left		align=left		48.30
9	align=left		align=left		48.34

Semifinal 2

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.78	Q
2	align=left		align=left		46.88	Q
3	align=left		align=left		47.14
4	align=left		align=left		47.36
5	align=left		align=left		47.38
6	align=left		align=left		47.73
7	align=left		align=left		48.03
8	align=left		align=left		48.04

Semifinal 3

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.08	Q
2	align=left		align=left		46.56	Q
3	align=left		align=left		46.81	q
4	align=left		align=left		47.13	q
5	align=left		align=left		47.60
6	align=left		align=left		47.94
7	align=left		align=left		48.22
8	align=left		align=left		48.36

Heats

8 July

Heat 1

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		47.34	Q
2	align=left		align=left		47.78	Q
3	align=left		align=left		47.85	Q
4	align=left		align=left		48.17
5	align=left		align=left		48.38
6	align=left		align=left		49.20
7	align=left		align=left		50.80
	align=left		align=left		DQ	IAAF rule 163.3

Heat 2

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		47.86	Q
2	align=left		align=left		47.95	Q
3	align=left		align=left		48.24	Q
4	align=left		align=left		48.42
5	align=left		align=left		48.47
6	align=left		align=left		48.90
7	align=left		align=left		49.29
8	align=left		align=left		49.45

Heat 3

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.82	Q
2	align=left		align=left		48.03	Q
3	align=left		align=left		48.21	Q
4	align=left		align=left		48.42
5	align=left		align=left		48.49
6	align=left		align=left		48.61
7	align=left		align=left		49.06
8	align=left		align=left		52.08
9	align=left		align=left		54.87

Heat 4

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		46.53	Q
2	align=left		align=left		47.18	Q
3	align=left		align=left		47.38	Q
4	align=left		align=left		47.73	q
5	align=left		align=left		47.99
6	align=left		align=left		48.06
7	align=left		align=left		48.54
8	align=left		align=left		49.08

Heat 5

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		47.32	Q
2	align=left		align=left		47.34	Q
3	align=left		align=left		47.39	Q
4	align=left		align=left		47.78	q
5	align=left		align=left		47.97
6	align=left		align=left		48.46
7	align=left		align=left		48.56
8	align=left		align=left		51.53

Heat 6

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		47.56	Q
2	align=left		align=left		47.85	Q
3	align=left		align=left		47.93	Q
4	align=left		align=left		48.20
5	align=left		align=left		48.25
6	align=left		align=left		48.58
7	align=left		align=left		49.36
8	align=left		align=left		49.40
9	align=left		align=left		54.57

Heat 7

Rank	Name	Nationality	Time	Notes
1	align=left		align=left		47.35	Q
2	align=left		align=left		47.38	Q
3	align=left		align=left		47.45	Q
4	align=left		align=left		47.75	q
5	align=left		align=left		47.80
6	align=left		align=left		48.07
7	align=left		align=left		48.47
8	align=left		align=left		49.10

Participation

According to an unofficial count, 58 athletes from 42 countries participated in the event.