Sleep Doctor for Parade Apple Watch Core Sleep Feature - Reply by July 14

Story: “Core Sleep” on an Apple Watch Publication: Parade Sources needed: Sleep doctor Deadline to answer questions: Monday, July 14, EOD Questions: - Name, credentials, link to about/bio page - What does “core sleep” mean on an Apple Watch? - What are the sleep stages, and how does “core sleep” fit in? Please list and explain each stage. - How much core sleep does a person need? Please explain your answer & why core sleep is important. - How much sleep in the other stages does a person need? Please explain. - How can you get more core sleep? - What are other definitions people may have of “core sleep",” other than the Apple Watch definition? - Anything else for people to know? Guidelines: Please let me know if you can help with any of these stories & who the expert/source is. Once I give you the green light, please answer the questions by the deadline listed. If you mention a study or say “research,” please link it! NEW: Don’t use AI to generate your answers. EOD for me means 11:59pm, but the earlier the better!