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在跨栏比赛中,经常发生这样的现象:运动员起跑后,很顺利地越过数座栏架,在他有望达到胜利时,却撞倒栏架,速度也减慢下来。撞倒栏架,这除了存在有待改进的技术问题外,美国五十年代著名跨栏教练威尔伯·罗斯把产生这种现象的原因为之于视觉疲劳。 1968年墨西哥奥运会110米栏冠军、美国的达文波特和获得第三名的意大利选手奥托兹,在1966年曾在苏黎世进行过一次争夺世界纪录的较量。两人的跑道紧挨着,枪响的同时,两人都跃离起跑器。当接近最后一个栏时,奥托兹试图加快摆动腿动作,不幸撞在栏架上,他的速度也就慢下来,使达文波特赢得胜利。事后奥托兹解释他撞栏架的原因是因为看不见栏頂。
In the hurdle race, it is often the case that after the athlete has started, he has successfully crossed several racks and, when he is expected to achieve victory, rams down the railing and slows down. Knocking down the racks, which in addition to the technical problems to be improved, the famous American hurdles coach Wilbur Rose in the fifties caused this phenomenon because of visual fatigue. The 1968 Olympic Games 110m hurdles champion in Mexico, Davenporter in the United States, and the third-placed Italian aunt Otto in 1966 competed for a world record in Zurich. Two people close to the runway, gunshots at the same time, they both jump off the starting device. As he approached the last column, Ottoz tried to speed up swinging legs and, unfortunately, crashed into the railing, his speed slowed to make Davenport win. After the fact that Aotuz explained that he hit the railing because of the invisible fence.