(from the article `sprint`) ...off in lanes within which each runner must remain for the entire race. Originally sprinters used a standing start, but after 1884 sprinters ...
[n] - block providing bracing for a runner`s feet at start of a race
noun block providing bracing for a runner`s feet at start of a race
a device used by runners, esp. sprinters, for increasing their speed off the mark, consisting of a metal or wooden frame, usually secured to the ground at both ends, with adjustable, triangular-shaped blocks on each side for bracing the feet.