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Sleep & Recovery

Explore our latest insights, protocols, and evidence-based guides for sleep & recovery.

Core Sleep vs Deep Sleep: What Your Wearable Data Really Means
Featured•June 9, 2026

Core Sleep vs Deep Sleep: What Your Wearable Data Really Means

Understand the difference between core sleep and deep sleep. Discover how light N1 and N2 stages support brain health while N3 deep sleep repairs the body.

aelívra Team•5 min read

More from Sleep & Recovery

Why You Wake Up at 3 AM: Cortisol and Sleep Maintenance Insomnia
Sleep & Recovery•June 5, 2026

Why You Wake Up at 3 AM: Cortisol and Sleep Maintenance Insomnia

Learn why cortisol spikes and blood sugar crashes cause 3 AM wakeups. Discover how sleep maintenance insomnia affects heart health and how to reset your rest.

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aelívra is a structured AI-support engine using industry-standard scientific reasoning approaches and can make mistakes. It does not provide medical advice, diagnosis, or treatment. Our services facilitate self-guided exploration for discussion with your healthcare provider and are not a substitute for professional medical advice or your relationship with a qualified provider.aelívra · ABN 70 549 662 581