Physical health is crucial during the preparation phase for the UPSC exam as it directly impacts a candidate's mental clarity, stamina, and overall productivity. A healthy body fosters a clear mind, helping candidates manage stress associated with rigorous study schedules. Regular exercise, a balanced diet, and sufficient sleep can enhance focus and retention, ensuring aspirants remain engaged during their study sessions. Many successful candidates emphasize the importance of a fit lifestyle to balance preparation and well-being, making physical health a cornerstone of effective UPSC preparation.