The number of runners in a relay race can vary depending on the specific type of relay event. In track and field, the most common relays include:
- 4x100 meter relay: 4 runners per team.
- 4x400 meter relay: 4 runners per team.
- Medley relay: The number of runners can vary, but it typically involves 4 runners with different distance segments.
Other relay races, such as road relays or triathlons, may have different formats and numbers of participants. It's important to check the specific rules of the event for details on the number of runners involved.