Thinking you’ll get up early tomorrow and go to the gym feels good. I used to imagine in detail what exercise I was going to do the next day. This kind of detailed planning is a type of fantasy and gives you a dopamine hit. But, it doesn't make you more likely to actually go to the gym the next morning.
23 thoughts that will make you hate exercise
It is hard to find the motivation to do something you hate. Given that your thoughts create your feelings, these thoughts are more likely going to create feelings of dread, shame, anxiety, irritation, apprehension, disgust or fear and make it hard to exercise.
Stop Hating Exercise 