How Much Deep Sleep Do You Need? - Sleep Foundation Deep sleep gives your body a chance to repair and recover and leaves you refreshed in the morning Learn how much deep sleep you need and how to get more
Best Sleep Trackers of 2025: Data That Matters Sleep trackers provide tailored insights into how well you’re sleeping Our testing team tried out dozens of models to find the best tech for you
Insomnia - Symptoms and causes - Mayo Clinic Sleep-related disorders Sleep apnea causes you to stop breathing at times during the night, disrupting your sleep Restless legs syndrome causes a strong uncomfortable urge to move your legs when trying to fall asleep This may keep you from falling asleep or getting back to sleep Caffeine, nicotine and alcohol