中老年教师每天都要趴在桌子上备课和批改作业,胸背部经常处在弯曲状态,时间长了,往往会引起头痛、头晕、腰背酸痛、四肢无力等一系列症状。随着年龄的增长,还会引起肌肉萎缩、关节僵直、脊柱弯曲、心肺功能降低、胃肠消化不良等现象。如果中 Middle-aged teachers lying on the table every day to prepare lessons and modify homework, chest and back are often in a curved state, a long time, often cause headaches, dizziness, back pain, limb weakness and a series of symptoms. With age, but also cause muscle atrophy, joint stiffness, curvature of the spine, decreased cardiopulmonary function, gastrointestinal dyspepsia and so on. If