4 x 100m and 4 x 400m Segments

My entire track career I have heard people talk about the 4 segments of these races. What people never talk about is the uneven distances ran by each person.

Here let me explain:

4 x 100m

Leg 1 — 95m

Leg 2 — 100m

Leg 3 — 100m

Leg 4 — 105m

4 x 400m

Leg 1 — 390m

Leg 2 — 400m

Leg 3 — 400m

Leg 4 — 410m

These are the general distances each leg has to run if they do their hand-offs correctly.

For instance using a 4 x 100m time of 40 sec (where you used a 100m split for them all that perfectly was 10 sec) it should really look like: 10.5 – 10 – 10 – 9.5.

Using a similiar tactic for the 4 x 400m time of 4 minutes  (where you used a 400m split for them all that perfectly was 60 sec) it should really look like: 61.538… – 60 – 60 – 58.537..


The original videos are the second and third video in the playlist.

4 x100m Video Analysis:

Leg 1 — 11.275 sec (95m) — ~11.868… sec (100m)

Leg 210.825 sec (100m)

Leg 310.425 sec (100m)

Leg 4 — 10.525 sec (105m) — ~10.024… sec (100m)

Total Time: 43.05 sec

“Fixed” Time: 43.142 sec — 0.214% Error

4 x400m Video Analysis:

Leg 1 — 55.308 sec (390m) — ~56.726… sec (400m)

Leg 253.467 sec (400m)

Leg 356.208 sec (400m)

Leg 4 (ME) — 54.282 sec (410m) — ~52.96 sec (400m)

Total Time: 3:39.267

“Fixed” Time: 3:39.361 — 0.043% Error

As you can see if creates >0.3% error consistently and this number plummets drastically when its the 4 x 400m.

For anyone wondering if these times are correct well here’s the pre-render project settings I used to go through frame by frame of the video to prove you wrong. I rendered it at 720p and at 120fps, but YouTube only allows for 60fps sadly.

Video Analysis Properties

To convert from 95m to 100m take the 95m time and multiply it by: (100/95).
To convert from 105m to 100m take the 105m time and multiply it by: (100/105).
To convert from 390m to 400m take the 390m time and multiply it by: (400/390).
To convert from 410m to 400m take the 410m time and multiply it by: (400/410).
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