REM vs. Deep Sleep: Here's What Actually Happens When You Sleep

Are you truly getting the quality sleep you deserve when resting? Experiencing grogginess and fatigue even after hours of sleep indicates that you might not get the shut-eye needed to feel refreshed and rejuvenated. 

Nowadays, technology can help with just about anything, including evaluating how good or bad your sleep patterns are. Modern gadgets like sleep trackers, smart rings, smart beds and other wearable devices make it possible to get pretty accurate sleep diagnoses. 

Read on for a breakdown of sleep cycles and what that means for you, to help you better understand them. 

Read more: I Went to Sleep With a Robot to Get Better Sleep. This Is What Happened

What are sleep cycles?

Humans sleep in cycles. The best known is REM, which stands for rapid eye movement because your eyes move rapidly during this stage of sleep. Scientists and researchers generally divide the ...