A recommended physical fitness routine for UPSC candidates includes a combination of aerobic exercises, strength training, and flexibility workouts. Engaging in activities such as running, swimming, or cycling can boost stamina and energy levels, essential for long hours of study. Incorporating yoga or stretching exercises can enhance flexibility while providing mental peace. It's also crucial to balance physical activities with adequate rest and proper nutrition to support overall well-being. A structured routine supporting physical and mental health helps candidates stay focused and motivated.