The sport's rules require that a race walker's knees stay straight through most of the leg swing and one foot remain in contact with the ground at all times.

这项运动的规则要求竞走运动员的膝盖在大部分的腿部摆动过程中保持笔直，一只脚始终与地面保持接触。

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Your hands control the tension in your upper body, while your arm swing works in conjunction with your leg stride to drive you forward.

你的手控制着你上半身的紧张程度，而你的手臂随着步伐的来回摆动则能给你向前的动力。

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As your left leg slides back your right arm should swing forward.

当你的左脚向后滑时，你的右手臂就得向前摆。

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Resist the urge to fast forward your DVR and stand behind your chair while holding a book or something heavy, then swing your leg over the chair.

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All of their bowlers are dangerous all of the time thanks to reverse swing, Harbhajan's unusual doosra and Mishra's mix of leg spin and googlies and with MS Dhoni's usually enterprising captaincy, India could well end up as the leading test team in the world.

BBC: Jonathan Agnew column

The Concept E-go also boasts exclusive technical innovations such as the " single sided double leg fork" , with 35 mm of inner tube and the aluminium single side swing arm.

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