Efficient Sleep
Dr. Gina Poe explains that the timing of sleep states is important for efficient sleep. The first half of the night is for deep, slow wave cleaning sleep, while the second half is for REM sleep. Going to bed too late or waking up too early can disrupt this cycle. However, missing one night of sleep can be made up for the next night.In this clip
From this podcast

The Knowledge Project
The Science of Better Sleep | Dr. Gina Poe | Knowledge Project Podcast 167
Related Questions
How much REM sleep should one get each night according to the episode The Science of Better Sleep | Dr. Gina Poe | Knowledge Project Podcast 167 and the clip Efficient Sleep?
What is a reasonable amount of time to spend in the deep and REM phases of sleep according to the episode Dr. Gina Poe: Use Sleep to Enhance Learning, Memory & Emotional State | Huberman Lab Podcast and the clip Understanding Sleep Phases?
What is a reasonable amount of time to spend in the deep and REM phases of sleep according to the episode Dr. Gina Poe: Use Sleep to Enhance Learning, Memory & Emotional State | Huberman Lab Podcast and the clip Understanding Sleep Phases?