It all depends on what the person running the dash prefers. I personally don't know how to use a block, so I just run it without it.
Blocks are highly recommended when running a 400m. Remember: it's a sprint. You don't see 100m dashers starting without blocks, so there's nothing different about starting blocks for the 400. If you don't know how to use blocks, you should really get some extra help from a coach or someone on the team who has experience. Using blocks will almost always cut down your time in any race.
Get the blocks out.
A 400m dash is 0.4km.
1km = 1000m so the 1500m only
Otis Harris
Alberto Juantereno from Cuba won the 400m and 800m at the Montreal Olympic Games in 1976.
The 440-yard dash is about 8 feet farther than the 400m.
Tonique Williams-Darling of the Bahamas.
about 60 seconds.
She won a silver medal in the women's 400m dash.
Michael Johnson 43.84
The 100m dash, 200 m dash, (sometimes) 400m dash, 100m hurdles, 110m hurdles, (sometimes) 300m hurdles, and sprint relays.
The men's world record in the 400 meter dash is 43.18 seconds. The men's world record in the 400 meter hurdles is 46.78 seconds. This is a difference of 3.60 seconds. The women's world record in the 400 meter dash is 47.60 seconds. The women's world record in the 400 meter hurdles is 52.34 seconds. This is a difference of 4.74 seconds.