The ideal duration of study sessions for UPSC preparation generally ranges from 2 to 4 hours with regular breaks. Long study periods without breaks can lead to burnout and decreased productivity. It’s essential to create a balanced schedule that includes frequent short breaks of around 10-15 minutes after each session to allow for mental recovery. This method enhances concentration and helps retain information better. Maintaining variation in study methods, such as integrating discussions, self-tests, or revising with flashcards, can also enhance engagement during these sessions.