He was diagnosed with runner's knee.

She developed runners' knee after running a marathon.

The rope runners are practicing their skills at the park.

The runners and riders in the race were a mix of experienced professionals and enthusiastic amateurs.

Indian Runners are a breed of domestic ducks known for their upright posture and slender body.

The route runners are practicing their routes for the game.

The circle runners are warming up before the race.

The Bow Street Runners were a group of law enforcement officers in London.

The free runner effortlessly leaped over the obstacles in the urban landscape.

The rat runner scurried across the street.