座るのこわい、聞くのはもっと怖い！
怖いのは座るだけじゃない。
Smoking kills you!
And sitting will be also killing you while you do more than 5 hours.
But nobody mentions about SOUND must be killing your cognitive function as the result of hearing loss.
You should quite your manner that you are studying on the chair very harder or much concentration and listening some music or language with your ear phone.
PS
同じ姿勢（行動）が身を滅ぼす！
- 座りすぎ
- 聞きすぎ
- 運動しすぎ
- 飲み過ぎ、吸い過ぎ、食べ過ぎ
そしてひょっとすると寝すぎもなにか問題があるかも(-_-;)
