Show Notes
Your child's cortisol is not a problem you need to manage — and most of the scary sleep advice that says otherwise is built on a misreading of the science. Craig and Arielle take on the claims that spread fastest online and hold up worst: the "overtired baby floods with cortisol" story, rigid wake windows, the 3-6-9 rule and the Wonder Weeks, magnesium lotions, melatonin as a quick fix, and the "biologically correct" 7 p.m. bedtime. It's an episode about why simple, absolute rules go viral while real answers — nuanced, and dependent on your actual child — do not. They close on the hardest question a tired parent faces: in an unregulated field full of confident strangers, how do you tell a trustworthy sleep expert from a good marketer?
Key Takeaways The "overtired child floods with cortisol and can't sleep" claim gets the science backwards. Poor sleep can nudge cortisol up, but cortisol is a marker of inadequate sleep, not its cause — and it is not something parents need to manage at home. The Middlemiss (2012) study used to argue that sleep training is harmful had no control group and studied infants in an unfamiliar inpatient setting, nothing like sleep training at home. Better-controlled work, including Gradisar's randomized trial, found infant cortisol did not rise after sleep training. A few hard nights are brief, harmless stress — not the chronic toxic stress that genuinely affects development. Wake windows describe something real — sleep drive builds the longer a child is awake — but the rigid, age-based formulas online are not research-based. Watch the child in front of you and their 24-hour sleep totals, not a chart. "Average" sleep needs span wide ranges and were never meant as individual targets. Magnesium lotions have no evidence they do anything; melatonin is a hormone, not a routine fix for healthy children, and should follow behavioral changes and a conversation with your pediatrician. Melatonin is now the most common substance U.S. children accidentally ingest — store it like medication. For most children before puberty, a bedtime roughly between 7:30 and 8:30 works well; an artificially early bedtime mostly manufactures bedtime battles. And the pediatrician is the first stop for sleep questions — "evidence-based" has become a marketing phrase, so ask any consultant how they actually make decisions.
Links Studies & research Middlemiss et al. (2012), Early Human Development — the cortisol/extinction study commonly cited against sleep training. https://doi.org/10.1016/j.earlhumdev.2011.08.010 Gradisar et al. (2016), Pediatrics — randomized controlled trial; infant cortisol did not rise after graduated extinction or bedtime fading. https://doi.org/10.1542/peds.2015-1486 Tuladhar et al. (2021), Journal of Sleep Research — infant diurnal cortisol and sleep. https://doi.org/10.1111/jsr.13357 Earlier bedtimes and child sleep — systematic review of 45 studies, JAMA Pediatrics. https://jamanetwork.com/journals/jamapediatrics/fullarticle/2795862 Pediatric Melatonin Ingestions, United States, 2012–2021 — CDC MMWR. https://www.cdc.gov/mmwr/volumes/71/wr/mm7122a1.htm Iglowstein I, Jenni OG, Molinari L, Largo RH. Sleep duration from infancy to adolescence: reference values and generational trends. Pediatrics. 2003 Feb;111(2):302-7. doi: 10.1542/peds.111.2.302. PMID: 12563055. Further reading on cortisol, sleep training, attachment, and online misinformation: Bilgin & Wolke (2020), Journal of Child Psychology and Psychiatry — "cry it out" and attachment/behavioral development at 18 months. https://doi.org/10.1111/jcpp.13223 Davis & Kramer (2021), Journal of Child Psychology and Psychiatry — commentary on Bilgin & Wolke (2020). https://doi.org/10.1111/jcpp.13390 Spangler & Grossmann (1993), Child Development — biobehavioral organization in securely and insecurely attached infants. https://doi.org/10.1111/j.1467-8624.1993.tb02962.x Ramos et al. (2025), Scientific Reports — mother-infant cortisol levels and maternal childhood a
More from The Sleep Edit
Can you keep breastfeeding and still work toward better sleep? Craig and Arielle talk with pediatrician and lactation consultant Dr. Lauren Hughes about newborn feeding, bottles, milk supply, and the difference between sleep training and night weaning. They also get into the advice that leaves parents feeling trapped: stretch every feed, never offer a bottle, assume every night waking means hunger. Key Takeaways Sleep training and night weaning are two separate decisions. Lauren sleep trained her twins at eight months and did not night wean them until eighteen — a baby can learn to fall asleep without help and still get every overnight feed they need. Six hours counts as sleeping through the night. It may not be the six hours you wanted — 8 p.m. to 2 a.m. qualifies — and reframing the target is sometimes the entire intervention. Milk storage capacity runs from roughly two to twelve ounces per breast and has nothing to do with breast size, which is why dropping a night feed is a non-event for one parent and tanks supply for another. How long you can go before engorgement is roughly your own ceiling, since engorgement is what tells the body to make less. "Normal" is far wider than parents are told: in the newborn weeks three hours is a maximum, not a minimum — babies can eat sooner, and three hours is when you wake them. Breastfed babies average about 24 ounces in 24 hours, range 19 to 32. It isn't nipple confusion, it's flow preference — babies take the path of least resistance, so a fast bottle beats the work of the breast, and paced feeding is the fix. Offering a bottle once a week from about a month old heads off the refusal that surfaces the week daycare starts. The research on feeding method and sleep genuinely conflicts, and neither host picks a side. Under six months exclusively breastfed babies wake more often, though most studies find no difference in total sleep; after six months most find breastfed infants sleeping less — and much of the older literature simply asked parents, whereas Rudzik's actigraphy study found no difference in measured sleep even as formula-feeding mothers reported more. Links Studies, articles & posts Infant sleep reports versus actigraphy by feeding method — Rudzik, Robinson-Smith & Ball, 2018 Milk feeding, complementary foods, and infant sleep: a systematic review — Fu et al., 2021 Sleep-related infant deaths: updated recommendations — American Academy of Pediatrics, 2022 How to keep your sleeping baby safe — AAP parent guide Bedsharing and breastfeeding: Protocol #6, 2019 revision — Academy of Breastfeeding Medicine, published 2020; a different professional position from the AAP People & books mentioned Dr. Lauren Hughes — pediatrician and International Board Certified Lactation Consultant Dr. Hughes' newsletter Bloom Pediatrics and Lactation — practice founded by Dr. Hughes Get in touch & next steps Craig's free sleep training starter kit Arielle's free 24-hour sleep guide Full medical disclaimer Submit Listener Feedback and Questions Here
Tips for Infants, Toddlers, and Teens In this episode of the Sleep Edit podcast, hosts Dr. Craig Canapari and Arielle Greenleaf provide evidence-based tips and strategies to help parents manage their children's sleep during the summer and back-to-school transitions. They discuss common issues such as later bedtimes, disrupted routines, increased screen time, and the impact of travel on sleep patterns. Chapters 00:00 Introduction and Disclaimer 01:09 Meet the Hosts 01:24 Summer Sleep Challenges 03:55 Pandemic Sleep Patterns 05:08 Structured Days Hypothesis 07:57 Managing Heat and Sleep 09:58 Travel and Sleep Tips for Infants and Toddlers 16:06 Vacation Sleep Realities 19:47 School-Age Sleep Strategies 20:50 Replicating Schedules for Special Needs Children 21:47 Bedtime Recommendations for Different Age Groups 23:07 Managing Screen Time During Summer 24:01 The Benefits of Summer Camps and Jobs 24:49 Camping as a Sleep Reset Tool 26:41 Traveling to Adjust Sleep Schedules 27:25 General Summer Sleep Tips for Parents 32:23 Adjusting Teen Sleep Schedules Before School Starts 37:38 Final Thoughts and Contact Information Links The Structured Days hypothesis Study of 9-15 year olds showed that later shift was associated with poorer dietary choices Resources (slides and references) from Dr. Canapari's talk on Covid-19 and sleep The Forbidden Zone and what it means for putting your kid down Vacation "sleep": How to get shuteye when on the move Dr. Canapari's article on summer sleep and back to school Camping as a way to reset sleep schedules Get in touch & next steps Craig's sleep training starter kit Arielle's free 24-hour sleep guide Full medical disclaimer Submit Listener Feedback and Questions Here
We opened the mailbag. Craig and Arielle grouped dozens of listener questions by theme and worked through them — covering infant sleep and the SNOO, night wakings that seem to defy logic, 4 AM toddler wake-ups, bedtime resistance, a 5-year-old with "bad dreams" that aren't actually scary, daycare nap chaos, and a rapid-fire round on floor beds, crib-to-bed transitions, and whether you have to sleep train at all. Some of it is practical, some is reassuring, and a few answers hinge on the difference between a behavior problem and a medical one. Key Takeaways Safe sleep comes first. In the first six months especially: flat, firm surface; room-share without bed-share; no soft bedding. If an infant genuinely can't tolerate lying flat, that's a pediatrician conversation, not a sleep-training one. When night wakings look random on the "same" schedule, average total sleep over seven days. Clock-time schedules can hide big variation in actual sleep amounts — and total sleep is what the child's body is optimizing against. A pattern of 4–5 hours of solid sleep followed by wakings every 2–3 hours almost always points to a sleep-onset association. If your child falls asleep with you present, they tend to need you present to transition between each subsequent sleep cycle. The right order for night weaning, room transition, and sleep training: get the baby into their own sleep space first, then address feeding, then sleep train. Don't layer sleep training on an unresolved feeding problem, and don't put an infant on a floor bed. A toddler whose sleep is consistently wrecked by mild congestion deserves a look for obstructive sleep apnea — especially if they snore when well. Benadryl only "works" because it sedates; it doesn't dry up viral secretions, and OTC cough/cold products aren't recommended under 6. You don't have to sleep train. If your child and household are sleeping well enough, there's nothing to fix. Sleep training is a tool for when someone in the house is suffering — not a milestone to hit. Links Studies, articles & posts Is Room Sharing in Infancy Necessary for Safe Sleep in 2024? – Dr. Canapari Co-Sleeping in Infancy: Bed-Sharing Is Not Safe – Dr. Canapari Sleep-onset associations: toddler night wakings and how to fix them – Dr. Canapari Why does my toddler wake up at night? – Dr. Canapari Toddler early morning awakenings: what to do about them – Dr. Canapari Is your toddler screaming at bedtime? A concrete plan for bedtime resistance – Dr. Canapari Napping problems in toddlers and preschoolers – Dr. Canapari What to do about nap strikes – Dr. Canapari The bedtime pass: a great technique for older kids – Dr. Canapari Huggy Puppy: my favorite treatment for nighttime fears – Dr. Canapari How to stop co-sleeping so you and your child can sleep better – Dr. Canapari Sleep training in a coughing child – Dr. Canapari Obstructive sleep apnea in children – Dr. Canapari AAP safe sleep recommendations (2022 update) — room sharing without bed sharing, flat firm surface, no soft bedding, ideally through the first 6–12 months Study showing benefits of outdoor play for sleep in Japanese Toddlers Murata E, Yoshizaki A, Fujisawa TX, Tachibana M, Taniike M, Mohri I. What daily factors affect the sleep habits of Japanese toddlers? J Clin Sleep Med. 2023 Jun 1;19(6):1089-1101. doi: 10.5664/jcsm.10508. PMID: 36789883; PMCID: PMC10235708. People & books mentioned Become Your Child's Sleep Coach: The Bedtime Doctor's 5-Step Guide, Ages 3-10 – Lynelle Schneeberg PsyD The Happiest Baby on the Block – Harvey Karp MD Get in touch & next steps Arielle's free 24-hour sleep guide: https://expect-to-sleep.kit.com/24hrsleep Submit Listener Feedback and Questions Here
Episode 17 – Show Notes Our Sleep Routines in 2026 | The Sleep Edit Craig and Arielle take a turn in the hot seat this week — sharing their own sleep habits, gear, and personal struggles. From frigid bedrooms and weighted blankets to trazodone, magnesium, and light therapy glasses, this episode is part confessional, part practical guide. They also dig into CBT-I for insomnia, the phenomenon of orthosomnia (when sleep tracking makes your sleep worse), what melatonin actually does at a low dose, and how to think about supplements when the evidence is thin but the risk is low. Timestamps 4:23 — Our personal sleep histories 6:36 — Restless leg syndrome & childhood sleep anxiety 8:50 — Psychophysiologic insomnia & CBT-I explained 11:00 — Bedtime boxes & stimulus control for kids 12:50 — Sleep tracking: Oura Ring vs. Apple Watch 16:20 — Orthosomnia — when tracking makes sleep worse 18:32 — How your tracker score affects how you feel the next day 19:00 — Sleep environment: cold rooms, darkness, white noise 22:52 — Sleep masks, weighted blankets (Bearaby), and pillows 27:00 — Light-up alarm clocks (Philips, Hatch) 29:00 — AYO light therapy glasses & circadian entrainment 32:00 — Nighttime routines: DND, showers, reading 34:40 — Why a hot shower helps you sleep (the science) 36:00 — Craig's meditation practice & pre-bed habits 39:20 — Arielle's history with insomnia & trazodone 41:10 — What sleep medications actually do (and don't do) 44:17 — Magnesium glycinate — the evidence 47:35 — L-theanine — even less evidence, still worth trying? 48:11 — Melatonin: Craig's 1mg dose & the heart failure study 52:00 — How we're actually sleeping in 2026 Key Takeaways Both hosts have struggled with sleep throughout their lives — and that's part of why they do this work. Sleep anxiety in children (and adults) responds well to CBT-I; the behavioral components are often more important than the cognitive ones. Sleep trackers are best used to observe trends, not to optimize nightly metrics. Fixating on scores can cause orthosomnia — anxiety that worsens the very sleep it's supposed to measure. A cold bedroom (ideally 60–67°F), darkness, and quiet are the most evidence-based environmental changes you can make. A warm shower or bath before bed works by triggering a drop in core body temperature — the direction of change matters, not just the temperature itself. Magnesium glycinate and L-theanine have limited but plausible supporting data; more importantly, they're safe at typical doses. Use third-party tested brands. Melatonin is a hormone — more is not better. Craig uses 1mg. A 2024 conference abstract linking long-term melatonin use to heart failure has significant methodological limitations, was not peer-reviewed, and is not cause for alarm at low doses in otherwise healthy adults. Trazodone is a reasonable long-term option for some people with chronic insomnia. It's not habit-forming, increases slow-wave sleep, and has a stable side-effect profile — but it's still a tool, not a substitute for good sleep habits. Note: AYO glasses recommend a 20-minute morning session (not 10 minutes as mentioned in the episode). Links Craig's gear & supplements AYO Light Therapy Glasses Bearaby Weighted Blanket Oura Ring Magnesium Glycinate 500mg Nature's Trove L-Theanine Melatonin 1mg ConsumerLab.com — third-party supplement testing (subscription ~$60/yr) Craig's posts & calculators Magnesium for Kids' Sleep – Dr. Canapari Melatonin & Heart Failure Study – Dr. Canapari Melatonin Dosing Calculator for Children – Dr. Canapari Clinicians & resources mentioned Dr. Shelby Harris – CBT-I specialist Dr. Lynelle Schneeberg – Become Your Child's Sleep Coach: The Bedtime Doctor's 5-Step Guide, Ages 3–10Book on Amazon
Holidays can be a time of joy, family, and fun—but they can also throw a wrench into your child’s sleep routine. Whether it’s late-night celebrations, travel to visit relatives, or adjusting to time zone changes, holiday sleep disruptions are a challenge for many parents. But don’t worry—we’ve got you covered.