Self-destruction, via small acts of self-sabotage.
Next day, your inner critic and saboteur tell you something along the lines of: "You shouldn't go today - you're tired, there's so much work that you should do instead, and you're not even doing the gym actually/properly (AGAIN), just look at yesterday, you couldn't even do 25 min, you've cheated and have now tainted it". Even though it was the same exact voice that led you to do it yesterday.
Next day, your inner critic and saboteur tell you something along the lines of: "You shouldn't go today - you're tired, there's so much work that you should do instead, and you're not even doing the gym actually/properly (AGAIN), just look at yesterday, you couldn't even do 25 min, you've cheated and have now tainted it". Even though it was the same exact voice that led you to do it yesterday.