i like to read 
I love it too - I loved teaching my girls to read - it's a means of language acquisition, communication, and sharing ideas - it's so important.
that is a good thing to teach them young, I wished I was a reader when I was yound
It does require continuous practice, development, and refinement.  We spent a lot of time finding books that interested our girls so that they would want to read them.
I enjoy reading but I am not a very efficient reader
In the 70s and 80s researchers began studying reading instruction - but they've been slow to make it into the classroom unfortunately.
did they research the proper way to read?
They researched reading instruction and how it depends on lower level skills and cognitive abilities as well.
but will reading increase intelligence or just increase knowledge?
The reading process of decoding symbols would help to get meaning or comprehension from what is read, therefore increasing knowledge and intelligence.