What is runner?

As an AI language model, I can provide general information about runners:

A runner usually refers to a person who runs either for leisure, exercise or competitively. Many people run for fitness and health benefits, while some may participate in organized running events and marathons. Running can help improve cardiovascular health, strengthen muscles and bones, burn calories, and reduce stress levels. Runners may use a variety of equipment, including running shoes, clothing, and accessories such as hydration packs, GPS watches, and heart rate monitors. In competitive running, athletes may train intensely to improve their speed, endurance, and technique. There are many different types of running events that vary in distance and terrain, including track races, cross country races, road races, and trail runs.