What is the best way to study for long hours and maintain the concentration level?

I am a jee aspirants so I am eligible enough to answer this.

To maintain consistency and study for long hours you need to be focused there should be distraction free environment and breaks is equally important to study for long hours.

Following method will help you to maintain consistency and study for long hours..

Play binaural beats(40HZ) in background for focus

Eliminate mobile

Use pomodoro technique(50 mins study 10 min break)

Stay hydrated while studying

Treat yourself 💘 end of theday

This is me 😁 and my books