Is there any good way to change the negative and pessimistic attitude towards life?

Exercise is a way to change pessimism. Not only does it mean going to the gym for special exercise, but you can also choose a good day to ride a bike by yourself by the river, or go hiking for a picnic with light food, or play your favorite music and clean your home carefully. In short, enrich your time, don't think for yourself, sweating is better, you can't be tired, you will consume excess energy, and you won't lose sleep or be consumed in sadness.