A man runs an incredibly fast past on a treadmill with others watching him.
A young man is standing on a track, using a treadmill to run.
A long distance runner practices on a treadmill machine located on the track outside while his coaches watch.
A group of people are outside on a track, as they watch a man on a treadmill run.
A man running on a treadmill on a track field.
A runner is seen running on a threadmill in a field while a few people spectate.
An elite runner runs on a treadmill while several men watch and record information.
An athlete runs on a treadmill standing on an athletics track
A man outside is running on a treadmill and hitting a record for a 5k
A track and field athlete runs at high speeds on a treadmill outdoors on top of the track.