Why 8 Hours Isn't Enough: How To Sleep Properly

Thanks to @FitnexaAI for sponsoring this video. Check out Fitnexa SomniPods 3 here and get $10 off: go.fitnexa.com/YWg423 Coupon code: DRALEX https://www.dralexnewsletter.com/ Join the community by signing up to my daily newsletter! Practical health advice, straight to your inbox, every morning. Ever wondered why you can lie in bed for a full eight hours and still wake up feeling wrecked? That number everyone quotes for a good night's sleep is really just an average, and what happens inside your deep sleep and REM cycles matters far more than the hours on the clock. In this video I break down sleep efficiency, why deep sleep and REM aren't interchangeable, and the quiet signs of sleep apnea that get missed for years. I also cover blood sugar, insulin sensitivity and the immune system, because what happens overnight touches almost everything else in your health. I've spent years pulling apart my own sleep data as a doctor and now as a father to a nine month old, and the eight hour figure never told me the full story. This video walks through where that number actually came from, why the shape of your night matters as much as the length, and the everyday habits quietly breaking your sleep apart without you noticing. I also talk about the timing of your sleep, the role of temperature and light, and what to do if trying harder to sleep has become part of the problem. And thanks to Fitnexa for sponsoring this one, I share something that's genuinely helped me get a better night lately. In this video you'll learn: -Why the eight hour target is an average and not a personal number -What sleep efficiency actually measures and why it matters more than time in bed -The very different jobs that deep sleep and REM do overnight -How obstructive sleep apnea hides behind normal seeming symptoms -Why sleep timing and regularity can matter more than total hours -The daytime habits that quietly decide how well you sleep at night -What to do when trying harder to sleep starts making things worse -Why cognitive behavioural therapy beats sleeping tablets for chronic insomnia TIMESTAMPS 00:00 – Introduction 03:29 – Where the Eight Hour Number Came From 08:17 – Sponsored: Fitnexa SomniPods 3 12:55 – The Hours in a Night Are Not Interchangeable 19:24 – When You Sleep, Not Just How Long REFERENCES Sleep regularity and mortality: a prospective analysis in the UK Biobank https://pubmed.ncbi.nlm.nih.gov/37995126/ Effect of sleep deprivation on response to immunization https://pubmed.ncbi.nlm.nih.gov/12243633/ Sleep restriction for 1 week reduces insulin sensitivity in healthy men https://pubmed.ncbi.nlm.nih.gov/20585000/ Beta-amyloid accumulation in the human brain after one night of sleep deprivation https://pubmed.ncbi.nlm.nih.gov/29632177/ REM sleep behaviour disorder: prodromal and mechanistic insights for Parkinson's disease https://pubmed.ncbi.nlm.nih.gov/27965397/ Iron and restless legs syndrome: treatment, genetics and pathophysiology https://pubmed.ncbi.nlm.nih.gov/28057495/ Management of Chronic Insomnia Disorder in Adults: A Clinical Practice Guideline From the American College of Physicians https://pubmed.ncbi.nlm.nih.gov/27136449/ Sleep duration and all-cause mortality: a systematic review and meta-analysis of prospective studies https://pubmed.ncbi.nlm.nih.gov/20469800/ Association of atrial fibrillation and obstructive sleep apnea https://pubmed.ncbi.nlm.nih.gov/15249509/ Disclaimer: This is not personal medical advice and does not override what your doctor says. #dralex #doctoralex #sleepscience #sleepapnea #insomnia #sleephealth #Fitnexa #SomniPods3 #SleepEarbuds #SleepTech #NightRoutine