"The Siesta Sleep"

This pattern consists of 2 sessions. Most commonly, it consists of long sleep(no longer than 6 hours) with a shorter nap during the day. Biphasic sleep takes advantage of what’s called the post lunch dip, a period in the early afternoon after lunch where your body feels a bit more sleepy than usual and can fall asleep more easily. When done right, biphasic sleep can give you more energy than monophasic sleep.

PROS

• Allows you to stay up later than usual
• Still experience multiple REM cycles
• Day time nap can increase cognitive functions
• Some flexibility
• Provides deep refreshment

CONS

• Can worsen bad sleeping habits
• Always have to take day nap
• Prone to accumulation of sleep deprovation