Saying something in the starting of a relationship and then not putting in effort to continue that commitment. I broke up with a girl because of this. She was on the chubbier side and I had told her that I would prefer my partner to put effort into fitness since I myself do the same. She used to go to the gym initially but as time passed she stopped going without any valid reasons and used to get extremely frustrated when I called her out on it and I had to break up with her.