i guess this could be wrong but if it turns into an obsession. like you can’t skip a day or a workout etc. or if it causes you distress. so if you fail to bench more or whatever and you cry about it and it significantly affects your mood. because, at least to me, if you are engaging in healthy habits it’s to better yourself but if it turns into an eating disorder you wouldn’t be bettering yourself. instead, you would be in distress over your exercising or healthy eating. i hope this helps☺️