Lifestyle choices that best support the physical and mental health of UPSC candidates include maintaining a balanced diet, adhering to a regular exercise routine, and ensuring adequate sleep. Proper nutrition fuels cognitive function, while exercise reduces stress and enhances overall well-being. Establishing a consistent sleep schedule helps improve concentration and retention of information. Moreover, incorporating relaxation techniques, such as meditation and hobbies, can improve mental resilience. Creating a sustainable routine that balances study with self-care is essential for maintaining the stamina required throughout the preparation journey.