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接力赛是田径比赛中唯一的一项集体项目,在水平相当的比赛中,尤其400米(4×100米)接力,前几名的成绩之差微乎其微,竞争之激烈,影响之广泛,绝非一般体育项目可比。为赢得这零点几秒,甚至零点零几秒,田径行家们除加强运动员身体素质,讲究战术外,对技术更是精雕细刻。有些教练员在使用确定传接棒标志线公式[传棒人最后30米平均速度×接棒人起跑27米所需时间一(27米—1.5米)]时,往往测不准传棒人最后30米平均速度,误差较大,至使本公式失去使用价值。如何排除由视角差而造成的误差,使这一分段计时更准确呢?下面介绍笔者的做法:
The relay race is the only collective event in the track and field competition. In the comparable race, the 400m (4 x 100m) relay, the difference between the top scores, the fierce competition and the extensive influence are by no means The general sports comparable. To win this zero seconds, or even zero in a few seconds, athletic experts in addition to strengthening the athlete’s physical fitness, pay attention to tactics, the technology is even more carved. Some trainers often fail to detect the final pass of the pass when using the formula for determining the pass line [the last 30 meters average pass speed * the second one 27 (27-1.5 meters)) 30 meters average speed, the error is larger, so that the formula loses its value. How to rule out the error caused by the poor perspective, so that the timing of this sub-paragraph more accurate? The following describes the author’s approach: