As the title suggests, whenever I engage in regular resistance training, I start having problems with cognition: can't focus on mental tasks, can't think abstractly, can't memorize new things... I become dumber.
Not only that, I need a lot of willpower to stop constantly thinking about training, about what I did in the gym, what I will do the next session, anxiously trying to improve my training program etc.
Things get back to normal in a week or so after I stop going to the gym.
What's interesting, a little more than half a year ago, I tried selegiline and it also made me feel dumb. And it did so in a similar way lifting weights does.
So, can anyone else relate to this? What do you think the problem is?