How to adjust the biological clock is mainly to make a plan for yourself and stick to it. If you go to bed on time at night, if you can't sleep, you can read books, listen to light music and brew a drowsiness. Can I sleep less and exercise more during the day? You can be a little tired at night, so you can fall asleep easily. Get up on time in the morning, don't stay in bed. It can be adjusted through gradual improvement.