时差N小时 如何判断自己是不是双关节?(下)（在线收听）

Connective tissues also form the tendons that join the bones to the muscles.

结缔组织同样也组成了连接肌肉与骨头的肌腱。

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，但是对于一些人来说，这些受限的结缔组织非常灵活，可以做出更大范围的活动，也就是我们所称的“双关节”。

Practice can increase a joint's natural flexibility just the way stretching can increase your muscles' flexibility.

关节的自然柔韧性可以通过锻炼加以改善，就像伸展运动能够加强肌肉的柔韧性一样。

While flexible joints are very useful to contortionists, some joints can become so loose that they are unstable.

灵活的关节对柔术演员来说至关重要，但他们的一些关节可能会变得很不稳固。

This allows the bones of the joint to slip out of their sockets and can be very damaging.

这很容易导致关节脱臼，对身体造成很大的伤害。

Strengthening the muscles around the joint can stabilize it and still allow you to show off your trick joint at parties.

加强关节周围肌肉的锻炼能够使关节稳固，并且你依然可以在各式派对上一展“灵活”的风采。