My parents treat me like a kid. When they go out, I can't go up and down the stairs to exercise or use the oven, because I might get hurt.
There's a community help section. I suggest putting these kinds of threads there. Unless you're just doing this to complain.
This may seem outrageous, but if you show them that you can be mature and responsible by acting mature and responsible, then after awhile they will begin to think that you are mature and responsible and start treating you as such. P.S. - Running up and down the stairs is 1) not exercise - go outside and 2) probably super duper annoying to everyone else in the house.
Have you ever hurt yourself before doing either of those things? Also, how old are you? Age might have something to do with it.
In some of your older posts, you have said that you are twenty years old. Have you considered moving out of your parent's house?