Often, when we strive to achieve a fitness goal (or any goal for that matter), a common cognitive distortion arises known as "all or nothing" or polarised thinking. Essentially, this can be defined as a black and white method of thinking: the belief that something must be fully initiated or engaged in, otherwise, it’s not going to have an impact. Some common examples might be, "I have to eat perfectly, otherwise, I’m wasting my time," or, "If I miss a day at the gym, then I’ve ruined my week." The issue with All or Nothing thinking is that the overwhelming majority of cases will yield the "Nothing" side of the equation.
You’ll find that this type of thinking can seep into nearly every element of day-to-day living. Remember, if you’re struggling with this, there’s a likelihood that your clients will be too.