Environmental factors affecting intelligence

Would you say doing maths, further maths and physics from 16-18 at sixth form and then doing nothing for 3 years except browsing here, masturbating, talking to yourself and barely going outside would have a marked affect on your intelligence?
If so then how would you remedy it? How would you train your brain to grasp concepts faster and think abstractly if you can only read 6-15 pages an hour?
Would learning to think and write in another language help?
How about playing an instrument?

stop dealing in 'intelligence', it's a worthless term that becomes irrelevant after you leave grade school

deal in accomplishments instead. are you a high school drop-out? get a GED. are you unemployed? get a job. are you boring as fuck? pick up a hobby

all of these things will do more to make people perceive you as 'smarter' than any brain-training pseudoscience bs you can find on the internet

Depends on what you mean by intelligence. Is sitting around being a stagnant piece of shit going to effect your brain? Absolutely. Is sitting around being a stagnant piece of shit going to effect your capacity for intelligence? Probably not. Unless you are doing drugs etc. Then there are outside factors. Playing an instrument and learning another language will always be helpful. Any time you're actively learning something you are promoting brain activity on a critical level.

I should have meant, I can only read adornos appreciations and an essay on style at a rate of 3 pages an hour, I can only read moby dick at a rate of 10-12 pages an hour. Whenever I'm reading I have to reread sentences because I'm extremely slow to understand things and have to subvocalise whenever I'm not reading something on Veeky Forums or a quick article.
I'm 21 and english is my first language, this shouldn't be happening, I used to be so much faster at grasping concepts 3 years ago. I've been reading for almost 6 months now and there is no improvement at all even though I try to challenge myself. For some reason after the first page my brain just shuts off, I just can't read deeply anymore. I can't think anymore, maybe this is because all my needs are fulfilled? Maybe because I haven't wrote anything or done anything under pressure and just let the days slip by?

It just feels like there is almost no activity in my brain whatsoever and I've reached a plateau. It even takes me a while to type out a post because I can't even explain my own thoughts or think.
I can always focus, or at least my conscious mind can try to focus, but my brain just doesn't interpret the words and syntax fast enough. It doesn't grasp the idea without having to subvocalise and reread up to 10 times even though all the individual words in a sentence are familiar to me. Whereas I read all the posts in this thread just by looking at them in a few seconds.

It's pretty much impossible to increase your intelligence. It is, however, possible to lower it. You can lower your child's intelligence by locking him into an empty room, by beating him senseless and by not feeding him. Other than that, it doesn't matter too much what he does or doesn't do. Your child won't play piano, if he doesn't want to and he won't learn a language unless he wants to. It's just that if he's intelligent, he probably does want to.

>muh intelligence muh IQ
literally psychological memes

IQ isn't a meme. It's an actual thing that can be studied and quantified. However, it has become a meme that if you have a lower IQ you are less capable. That's factually not true and to measure someone's value as a person based solely on IQ score is assanine and completely wrong. Especially when humans are nothing but soft squishy sacks of meat.

Perhaps it's an attention issue? I don't necessarily think that reading speed is necessarily a good marker of intelligence. My girlfriend and I are comparably intelligent, but she reads three times faster than I do.

Writing and reading are trainable skills. It has less to do with intelligence and more with practice. Just read as a hobby and try to do more writing (perhaps on an online forum?). Don't focus on benchmarking it, just practice.

>Especially when humans are nothing but soft squishy sacks of meat.
Some sacks have higher IQ and are more capable than other sacks.

So what IQ shows then? How good people at solving specific set of puzzles? Why is this important?