第一句：
How necessary is doing physical exercise to you?
How important is reading English aloud in the morning to you?
How important is keeping an early hour to you?
第二句：
I'm told that staying up too late can increase the risk of insomnia(失眠)/falling sick.
I've heard treating your friends like this can increase the risk of a broken friendship.
I've heard reading a book in such darkness can increase the risk of eyeache.