The forces down the arms become uneven when this is done but provides for a larger motion when swinging the leg forward.

这样做会让手臂受力不均但是当旋转腿向前幅度会更大。

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The volunteers also had the muscle tension in their lower legs analysed to detect the first signs of leg motion before they released the accelerator and pushed the brake pedal.

在志愿者松开油门并踩下刹车踏板前，捕捉到了一个小腿肌肉收缩的信号。

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They will feel their motion of leg is clumsy going down stairs.

在下楼梯时会感觉腿的动作不够灵活。

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Well, that's the theory behind a robotic wheelchair concept from the Chiba Institute of Technology, which uses leg-like motion to conquer obstacles a run-of-the-mill wheelchair can't.

ENGADGET: Robotic wheelchair concept adds leg-like movement, tackles stairs with ease (video)

The LS3 uses a gyroscopic sensor near the head and force and position sensors on each leg to maintain balance in motion.

FORBES: Magazine Article