在公园、社区里,经常看到一些晨练的老人用身体的不同部位撞树来健身。运动专家认为,这种健身方式属于碰撞运动,有健身效果,但是不太适合于老年人,尤其是那些体弱多病者。碰撞运动,就是身体不同部位与物体进行撞击,以达到锻炼肌肉、骨骼、皮肤、内脏器官的目的。运动方式可以是 In parks and communities, it is common to see some morning exercise elders crash into trees with different parts of the body. Sports experts believe that this way of fitness belong to the collision exercise, a fitness effect, but not suitable for the elderly, especially those frail and sick. Collision movement, that is, different parts of the body collide with the object, in order to achieve the purpose of training muscles, bones, skin, internal organs. The way of exercise can be