Candidates should consider various physiological aspects while preparing for UPSC, such as maintaining a balanced diet, managing sleep patterns, and incorporating physical exercise. A nutritious diet supports cognitive function, while adequate rest ensures that the brain remains alert during study sessions. Regular physical activity helps alleviate stress and improves concentration, which is vital during long hours of preparation. Additionally, practicing mindfulness or relaxation techniques can aid in managing anxiety, promoting a sustainable and healthy preparation routine that supports both mental and physical well-being.