The paper explains a term-stride length of middle-distance run from two aspects, one is the basic factors infect on speed, the other is kinematics parameter of support period.

从影响跑速的基本因素和支撑阶段的运动学参数两个方面对中长跑途中跑适宜步长进行了分析。

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The long run is also an important element for middle distance runners.

长距离跑也是中距离跑的重要元素。

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On the base of this, this paper put forward a training system for middle and long distance run which is based on aerobic capacity and centered on speed and speed endurance.

本文从中长跑运动竞速的目的为切入点，通过国内外中长跑运动训练的研究报道和自己实践的体会，提出以有氧能力为基础，以速度、速度耐力为中心的中长跑运动训练体系的设想。

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"You call yourself a middle-distance runner when you've run a mile in under four minutes, " Moorcroft, now chief executive of UK Athletics, told BBC Sport.

BBC: SPORT | Athletics | What was the Bannister legacy?

Like a middle-distance athlete on a bend, anyone who wants to run something in his 40s needs to position himself for supremacy a decade earlier.

ECONOMIST: Bagehot