An effective method for setting realistic fitness goals involves using the SMART criteria: Specific, Measurable, Achievable, Relevant, and Time-bound. This framework ensures that goals are clear and trackable, supporting accountability and motivation. For example, rather than aiming to "get fit," a SMART goal could be "run 5 kilometers in under 30 minutes within three months." By breaking down larger objectives into smaller, specific steps, individuals can focus on progress and adjustments, making it easier to stay committed to their fitness journey.