Search results for “sleep stages”
2 results for “sleep stages”
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Sleep & StressHow Much Deep Sleep Do Adults Need? Why It Matters for Your Health
Deep sleep is stage N3 of non-REM sleep. Adults commonly spend about 13–23% of total sleep in this stage, although the amount varies with age and from night to night.
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Heart & CirculationResting Heart Rate at Night: What’s Normal and What Can Raise It?
Your resting heart rate at night can change with sleep, alcohol, stress, fitness, illness and medicines. Learn what is normal, what can raise it, how to read wearable trends and when a change may need medical attention.
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