- ONELAP
- 1/4 mile, maybe
- Big lead at the Indianapolis 500
- Track circuit
- Single circuit
- 2.5 miles at the Indy 500, e.g.
- Quarter mile, at most tracks
- Quarter-mile, often
- Quarter mile, at many tracks
- A quarter mile, perhaps
- 50 meters in a pool, perhaps
- Quarter-mile, maybe
- A quarter mile, maybe
- Swimmer's unit
- Pool unit
- Track's 400 meters
- Running-track unit
- Short swim
- 2.5 miles at Indy
- Single trip around a track
- Complete circuit
- Basic pool exercise
- 440 yards, for many runners
- Quarter-mile, for many tracks
- 400 meters, in Olympic track and field
- 400 meters, maybe
- Full circuit
- Trip around the track
- Single rep for a pool hustler?
- Four hundred metres, on a track
- Swimmer's single circuit
- Single trip around the track
- 2.5 miles, at the Indy 500
- 2.5 miles, at Daytona
- 2.5 miles, in the Indy 500
- 400 meters, for a standard outdoor running track
