Individuals can get back on track after a fitness setback by setting realistic goals, re-establishing routines, and focusing on the big picture. It's essential to assess what caused the setback, whether it was due to injury, motivation, or external life events. Gradually easing back into a routine and surrounding oneself with supportive resources, such as workout partners or fitness communities, can reinvigorate motivation. Reflecting on past successes and reminding oneself of the long-term benefits of fitness can also help maintain momentum and encourage consistency.