Sleep means absent or reduced consciousness. Sleeping hours differs from person to person. Children need more sleeping hour’s. Usually they sleep for 14 to 15 hours in a day. When a kid moves to school then the sleeping hours get reduced. During Adult age the normal sleeping hours will be 7 to 9 hours. If you sleep for many hours then it will make you weak and lazy.
Insomnia means staying asleep. It might be caused for many reasons such as poor sleeping environment, psychological stress, excessive physical or mental stimulation before bedtime or an inconsistent sleeping schedule.
Nowadays sleeping is a great problem for many people. If you fail to sleep at least six hours a day then it will affect your mind and body. Go to sleep at 9 or 10 P.M and wake up early morning (5 or 6 A.M). It is a good time to practice Yoga.