A channel or passage that runs backward, or in athletics, a running pattern that goes back toward where you started.
Compound of 'back' and 'run' (Old English 'rinnan'). Likely developed as a technical term in athletics or fluid dynamics.
In sports like track, understanding backrun patterns helps coaches teach athletes how to decelerate safely—world-class sprinters can stop from 28 mph in about 10 meters, and the backrun technique is crucial to avoiding muscle strains.
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