Negative self-talk can adversely affect fitness motivation by diminishing confidence and creating a cycle of self-doubt. When individuals engage in critical self-assessment, it can lead to feelings of inadequacy and discourage them from pursuing their fitness goals. This internal dialogue may result in lower exercise adherence and a lack of progress. To combat this, cultivating a positive mindset and utilizing affirmations can enhance self-efficacy. By addressing negative self-talk, individuals can boost motivation and foster a more supportive and encouraging approach to their fitness journey.