What are the rules for starting blocks?
Officials' detail · The event and the start · 1 of 2Starting blocks must be used in every race up to and including 400 m and may not be used in any longer race. No part of the blocks may overlap the start line or reach into another lane, apart from the rear of the frame where it obstructs nobody. At major competitions the blocks are wired to measure reaction times.
How it works
- Where they are used: "for all races up to and including 400m (including the first leg of the 4 × 200m, the Medley Relay and 4 × 400m) and shall not be used for any other race".
- Position: "no part of the starting block shall overlap the start line or extend into another lane". The rear part of the frame may reach beyond the outer lane line if it obstructs no other athlete.
- Design: two foot plates on a rigid frame. They must give "no unfair advantage" and the frame may not get in the way of the feet as they leave.
- Foot plates: sloped, with a flat or slightly concave face. They can be adjusted forwards and backwards and may not move during the start.
- Fixing: by pins or spikes that do as little damage to the track as possible.
- The start system: at major competitions, and for any record, the blocks are linked to a certified start information system.
- Whose blocks: at major competitions athletes use the blocks provided. Elsewhere an athlete may use their own if they meet the rules, unless the organisers require theirs.
Tricky cases
Can a 400 m runner choose a standing start?
No. In races up to and including 400 m a crouch start and the use of starting blocks are compulsory.
Can the blocks be set at an angle across the lane on a bend?
Yes. The frame may point across the lane and its rear may cross the outer lane line, as long as it does not obstruct another athlete and no part reaches the start line.
Can an athlete bring their own blocks to a major championship?
No. At those competitions athletes use the starting blocks provided by the organisers.
Why the rule exists
Blocks give a firm surface to push against and stop sprinters digging holes in the track. Requiring the same wired blocks for everyone at major events means every reaction is measured in the same way.
Where it differs
| Where | What changes | Source |
|---|---|---|
| World Athletics rules | As above | TR 15 |
| Smaller competitions | A start information system is recommended, not required | TR 15.3 |
| Races over 400 m | No blocks | TR 15.1 |
From the rule book
World Athletics, Competition and Technical Rules, 2026 Edition, Technical Rules 15 and 16.3. Checked 14 October 2026. Official document: World Athletics Competition and Technical Rules 2026 (PDF).