Why a full night doesn’t always mean quality sleep

Preview text: Light sleep, deep sleep, REM. Here’s what each stage actually does

Wednesday, Mar 25, 2026 at 3:30 AM EasternKlaviyo

Sleep DoctorWhy a full night doesn’t always mean quality sleep

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Subject: Why a full night doesn’t always mean quality sleep
Preview text: Light sleep, deep sleep, REM. Here’s what each stage actually does
From: newsletter@sleepdoctor.com
Brand: Sleep Doctor
ESP: Klaviyo
Sent: Wed Mar 25, 2026, 3:30 AM ET
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