Key factors for a sustainable and enjoyable exercise routine include setting realistic goals, incorporating variety in activities, and finding exercises that spark joy. Focus on intrinsic motivation—engaging in what you love—ensures consistent participation. Establishing a social component, such as working out with friends or joining a class, can enhance accountability and motivation. Scheduling regular workouts and treating them as non-negotiable appointments also improves adherence. Additionally, listening to your body and allowing for adequate recovery days helps combat burnout, ensuring longevity in the fitness journey and ultimately fostering a sustainable routine.