很多老年朋友喜欢看书读报、写字绘画,或者看电视、打牌下棋,或者操作电脑,一上网就是大半天。虽然这些都是有益于身心健康,但坐的时间久了,就不利健康了。伏案久坐如果成为习惯,很容易使人肺部组织弹性降低,肺活量减少,心肺功能受损。人到老年,肺脏组织弹性大为降低,难免出现程度不同的纤维化,肺泡扩张能力也相应下降。如果长时间坐着 Many elderly friends like reading newspapers, writing and drawing, or watching TV, playing cards and playing chess, or operating a computer. Although these are good for physical and mental health, but sitting for a long time, it is not healthy. Sit-ups If sitting as a habit, it is easy to reduce the elasticity of the human lung tissue, reduce vital capacity and impair cardiopulmonary function. People to the elderly, greatly reduce the elasticity of the lung tissue, inevitably occur to varying degrees of fibrosis, alveolar dilatation also decreased accordingly. If sitting for a long time