Setting achievable fitness milestones is important because it provides individuals with clear, measurable goals that can enhance motivation and adherence to a fitness program. These milestones help break down larger fitness aspirations into manageable steps, making progress more tangible. Celebrating small successes along the way fosters a sense of accomplishment and encourages consistency. Moreover, achievable milestones help individuals avoid feelings of overwhelm and frustration, supporting long-term commitment to a healthy lifestyle and enhancing overall self-efficacy.