Ligaments and tendons usually restrict the movement of the joint, but in some people, these normally restrictive tissues can be quite flexible and allow the extra movement we call "double-jointed."

韧带与肌腱通常会限制关节的活动，但是对于某些人来说，这些结缔组织非常灵活，能做出更大范围的运动，也就是我们所称的“双关节”。

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Plus, that extra movement jump starts your circulatory system, which will sharpen your focus and keep you on top of your game at work.

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In the next over Mills found some extra lift and movement to unsettle Umar Akmal and have him caught behind first ball as he tried to take evasive action.

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