Fonti

Per gli studi indichiamo autori, titolo, rivista e anno, con il collegamento alla scheda su PubMed, il database della National Library of Medicine statunitense. Come scegliamo e usiamo le fonti è spiegato nel metodo SonnoLab.

Come funziona il sonno: la guida completa di SonnoLab

1. Baranwal N, Yu PK, Siegel NS. Sleep physiology, pathophysiology, and sleep hygiene. Progress in cardiovascular diseases, 2023. PubMed
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4. Sen A, Tai XY. Sleep Duration and Executive Function in Adults. Current neurology and neuroscience reports, 2023. PubMed
5. Watson NF, Badr MS, Belenky G, et al.. Recommended Amount of Sleep for a Healthy Adult: A Joint Consensus Statement of the American Academy of Sleep Medicine and Sleep Research Society. Sleep, 2015. PubMed
6. Watson NF, Badr MS, et al.. Recommended Amount of Sleep for a Healthy Adult: A Joint Consensus Statement of the American Academy of Sleep Medicine and Sleep Research Society. Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2015. PubMed
7. Watson NF, Badr MS, et al.. Joint Consensus Statement of the American Academy of Sleep Medicine and Sleep Research Society on the Recommended Amount of Sleep for a Healthy Adult: Methodology and Discussion. Sleep, 2015. PubMed
8. Watson NF, Badr MS, et al.. Joint Consensus Statement of the American Academy of Sleep Medicine and Sleep Research Society on the Recommended Amount of Sleep for a Healthy Adult: Methodology and Discussion. Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2015. PubMed
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10. Velzeboer R, Malas A, Wei S, et al.. Cannabis and sleep architecture: A systematic review and meta-analysis. Sleep medicine reviews, 2025. PubMed

Sonno REM: cos'è, a cosa serve e quanto ne serve

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4. Dauvilliers Y, Schenck CH, Postuma RB, et al.. REM sleep behaviour disorder. Nature reviews. Disease primers, 2018. PubMed
5. Ackermann S, Rasch B. Differential effects of non-REM and REM sleep on memory consolidation? Current neurology and neuroscience reports, 2014. PubMed
6. Riemann D, Dressle RJ, Benz F, et al.. Chronic insomnia, REM sleep instability and emotional dysregulation: A pathway to anxiety and depression? Journal of sleep research, 2025. PubMed
7. Boyce R, Williams S, Adamantidis A. REM sleep and memory. Current opinion in neurobiology, 2017. PubMed
8. Boyce R, Glasgow SD, Williams S, et al.. Causal evidence for the role of REM sleep theta rhythm in contextual memory consolidation. Science (New York, N.Y.), 2016. PubMed
9. Ebrahim IO, Shapiro CM, Williams AJ, et al.. Alcohol and sleep I: effects on normal sleep. Alcoholism, clinical and experimental research, 2013. PubMed
10. Gardiner C, Weakley J, Burke LM, et al.. The effect of alcohol on subsequent sleep in healthy adults: A systematic review and meta-analysis. Sleep medicine reviews, 2025. PubMed

Sonno profondo: cos'è, a cosa serve e come aumentarlo

1. Anaclet C, Fuller PM. Brainstem regulation of slow-wave-sleep. Current opinion in neurobiology, 2017. PubMed
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4. Baril AA, Beiser AS, Mysliwiec V, et al.. Slow-Wave Sleep and MRI Markers of Brain Aging in a Community-Based Sample. Neurology, 2021. PubMed
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6. Varga AW, Ducca EL, Kishi A, et al.. Effects of aging on slow-wave sleep dynamics and human spatial navigational memory consolidation. Neurobiology of aging, 2016. PubMed
7. Stutz J, Eiholzer R, Spengler CM. Effects of Evening Exercise on Sleep in Healthy Participants: A Systematic Review and Meta-Analysis. Sports medicine (Auckland, N.Z.), 2019. PubMed
8. Shafiq MA, Singh J, Khan ZA, et al.. Effect of exercise on sleep quality in Parkinson's disease: a mini review. BMC neurology, 2024. PubMed

Ritmo circadiano: cos'è, come funziona e come influisce sul sonno

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5. Blume C, Garbazza C, Spitschan M. Effects of light on human circadian rhythms, sleep and mood Somnologie : Schlafforschung und Schlafmedizin = Somnology : sleep research and sleep medicine, 2019. PubMed
6. Wittmann M, Dinich J, Merrow M, et al.. Social jetlag: misalignment of biological and social time Chronobiology international, 2006. PubMed
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Come dormire meglio: cosa funziona secondo la ricerca

1. Baranwal N, Yu PK, Siegel NS. Sleep physiology, pathophysiology, and sleep hygiene. Progress in cardiovascular diseases, 2023. PubMed
2. Ruan JY, Liu Q, Chung KF, et al.. Effects of sleep hygiene education for insomnia: A systematic review and meta-analysis. Sleep medicine reviews, 2025. PubMed
3. De Pasquale C, El Kazzi M, Sutherland K, et al.. Sleep hygiene - What do we mean? A bibliographic review. Sleep medicine reviews, 2024. PubMed
4. Windred DP, Burns AC, Lane JM, et al.. Sleep regularity is a stronger predictor of mortality risk than sleep duration: A prospective cohort study. Sleep, 2024. PubMed
5. Sletten TL, Weaver MD, Foster RG, et al.. The importance of sleep regularity: a consensus statement of the National Sleep Foundation sleep timing and variability panel. Sleep health, 2023. PubMed
6. Kalkanis A, Lenkens D, Steiropoulos P, et al.. Sleep regularity as an important component of sleep hygiene: a systematic review. Sleep medicine reviews, 2025. PubMed
7. Chaput JP, Biswas RK, Ahmadi M, et al.. Sleep regularity and major adverse cardiovascular events: a device-based prospective study in 72 269 UK adults. Journal of epidemiology and community health, 2025. PubMed
8. Qaseem A, Kansagara D, Forciea MA, et al.. Management of Chronic Insomnia Disorder in Adults: A Clinical Practice Guideline From the American College of Physicians. Annals of internal medicine, 2016. PubMed

Come addormentarsi velocemente: tecniche basate sulla scienza

1. Edinger JD, Arnedt JT, Bertisch SM, et al.. Behavioral and psychological treatments for chronic insomnia disorder in adults: an American Academy of Sleep Medicine clinical practice guideline. Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2021. PubMed
2. Brewster GS, Riegel B, Gehrman PR. Insomnia in the Older Adult. Sleep medicine clinics, 2022. PubMed
3. Furukawa Y, Sakata M, Yamamoto R, et al.. Components and Delivery Formats of Cognitive Behavioral Therapy for Chronic Insomnia in Adults: A Systematic Review and Component Network Meta-Analysis. JAMA psychiatry, 2024. PubMed
4. Matheson EM, Brown BD, DeCastro AO. Treatment of Chronic Insomnia in Adults. American family physician, 2024. PubMed
5. Donato KO, Falcão L, Nishizima A, et al.. Progressive muscle relaxation technique improves sleep quality and mental health: A systematic review and meta-analysis of randomized controlled trials. Journal of psychosomatic research, 2026. PubMed
6. Cannici J, Malcolm R, Peek LA. Treatment of insomnia in cancer patients using muscle relaxation training. Journal of behavior therapy and experimental psychiatry, 1983. PubMed
7. de Niet G, Tiemens B, Lendemeijer B, et al.. Music-assisted relaxation to improve sleep quality: meta-analysis. Journal of advanced nursing, 2009. PubMed
8. Jansson-Fröjmark M, Norell-Clarke A. The cognitive treatment components and therapies of cognitive behavioral therapy for insomnia: A systematic review. Sleep medicine reviews, 2018. PubMed
9. Traupman EK, Dixon MA. Cognitive-behavioral therapy for insomnia for primary care: Review of components and application for residents in primary care. International journal of psychiatry in medicine, 2022. PubMed

Risvegli notturni: cause comuni e cosa fare

1. Akaishi T. Difficulty Falling Asleep, Nocturnal Awakening, Sleep Dissatisfaction, and Irritability in the General Population. The Tohoku journal of experimental medicine, 2024. PubMed
2. Di Bello F, Napolitano L, Abate M, et al.. "Nocturia and obstructive sleep apnea syndrome: A systematic review". Sleep medicine reviews, 2023. PubMed
3. Vrooman OPJ, van Kerrebroeck PEV, van Balken MR, et al.. Nocturia and obstructive sleep apnoea. Nature reviews. Urology, 2024. PubMed
4. Doyle-McClam M, Shahid MH, Sethi JM, et al.. Nocturia in Women With Obstructive Sleep Apnea. American journal of lifestyle medicine, 2021. PubMed
5. Vaughan CP, Bliwise DL. Sleep and Nocturia in Older Adults. Sleep medicine clinics, 2018. PubMed
6. Gottlieb DJ, Punjabi NM. Diagnosis and Management of Obstructive Sleep Apnea: A Review. JAMA, 2020. PubMed

Temperatura ideale camera da letto: come influenza il sonno

1. Okamoto-Mizuno K, Mizuno K. Effects of thermal environment on sleep and circadian rhythm. Journal of physiological anthropology, 2012. PubMed
2. Hinnant B, Buckhalt JA, Brigham EF, et al.. Socioeconomic Disparities, Nighttime Bedroom Temperature, and Children's Sleep. Journal of applied developmental psychology, 2023. PubMed
3. Baniassadi A, Manor B, Yu W, et al.. Nighttime ambient temperature and sleep in community-dwelling older adults. The Science of the total environment, 2023. PubMed
4. Bowersox SS, Dement WC, Glotzbach SF. The influence of ambient temperature on sleep characteristics in the aged cat. Brain research, 1988. PubMed
5. Haghayegh S, Khoshnevis S, Smolensky MH, et al.. Before-bedtime passive body heating by warm shower or bath to improve sleep: A systematic review and meta-analysis. Sleep medicine reviews, 2019. PubMed
6. Horne JA, Reid AJ. Night-time sleep EEG changes following body heating in a warm bath. Electroencephalography and clinical neurophysiology, 1985. PubMed
7. Harding EC, Franks NP, Wisden W. Sleep and thermoregulation. Current opinion in physiology, 2020. PubMed
8. Parmeggiani PL. Thermoregulation and sleep. Frontiers in bioscience : a journal and virtual library, 2003. PubMed
9. Cerri M, Amici R. Thermoregulation and Sleep: Functional Interaction and Central Nervous Control. Comprehensive physiology, 2021. PubMed
10. Parmeggiani PL. Interaction between sleep and thermoregulation: an aspect of the control of behavioral states. Sleep, 1987. PubMed

Caffeina e sonno: quando smettere di bere caffè

1. Gardiner C, Weakley J, Burke LM, et al.. The effect of caffeine on subsequent sleep: A systematic review and meta-analysis. Sleep medicine reviews, 2023. PubMed
2. Reichert CF, Deboer T, Landolt HP. Adenosine, caffeine, and sleep-wake regulation: state of the science and perspectives. Journal of sleep research, 2022. PubMed
3. Clark I, Landolt HP. Coffee, caffeine, and sleep: A systematic review of epidemiological studies and randomized controlled trials. Sleep medicine reviews, 2017. PubMed
4. Drake C, Roehrs T, Shambroom J, et al.. Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2013. PubMed
5. Nehlig A. Interindividual Differences in Caffeine Metabolism and Factors Driving Caffeine Consumption. Pharmacological reviews, 2018. PubMed
6. Low JJ, Tan BJ, Yi LX, et al.. Genetic susceptibility to caffeine intake and metabolism: a systematic review. Journal of translational medicine, 2024. PubMed
7. EFSA NDA Panel — Scientific Opinion on the safety of caffeine. EFSA Journal, 2015. doi.org

Alcol e sonno: perché si dorme peggio la seconda metà della notte

1. Gardiner C, Weakley J, Burke LM, et al.. The effect of alcohol on subsequent sleep in healthy adults: A systematic review and meta-analysis. Sleep medicine reviews, 2025. PubMed
2. Ebrahim IO, Shapiro CM, Williams AJ, et al.. Alcohol and sleep I: effects on normal sleep. Alcoholism, clinical and experimental research, 2013. PubMed
3. He S, Hasler BP, Chakravorty S. Alcohol and sleep-related problems. Current opinion in psychology, 2019. PubMed
4. Greenlund IM, Bigalke JA, Tikkanen AL, et al.. Evening binge alcohol disrupts cardiovagal tone and baroreflex function during polysomnographic sleep. Sleep, 2021. PubMed
5. Grosicki GJ, Robinson AT, Joyner MJ, et al.. Real-world effects of alcohol on heart rate, sleep, and physical activity by age and sex. PLOS digital health, 2026. PubMed
6. Sagawa Y, Kondo H, Matsubuchi N, et al.. Alcohol has a dose-related effect on parasympathetic nerve activity during sleep. Alcoholism, clinical and experimental research, 2011. PubMed
7. Burgos-Sanchez C, Jones NN, Avillion M, et al.. Impact of Alcohol Consumption on Snoring and Sleep Apnea: A Systematic Review and Meta-analysis. Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery, 2020. PubMed
8. Taveira KVM, Kuntze MM, Berretta F, et al.. Association between obstructive sleep apnea and alcohol, caffeine and tobacco: A meta-analysis. Journal of oral rehabilitation, 2018. PubMed

Come leggere i dati del tuo sleep tracker in modo corretto

1. de Gans CJ, Burger P, van den Ende ES, et al.. Sleep assessment using EEG-based wearables - A systematic review. Sleep medicine reviews, 2024. PubMed
2. de Zambotti M, Cellini N, Goldstone A, et al.. Wearable Sleep Technology in Clinical and Research Settings. Medicine and science in sports and exercise, 2019. PubMed
3. Chee MW, Baumert M, Scott H, et al.. World Sleep Society recommendations for the use of wearable consumer health trackers that monitor sleep. Sleep medicine, 2025. PubMed
4. Chinoy ED, Cuellar JA, Huwa KE, et al.. Performance of seven consumer sleep-tracking devices compared with polysomnography. Sleep, 2021. PubMed
5. Schyvens AM, Peters B, Van Oost NC, et al.. A performance validation of six commercial wrist-worn wearable sleep-tracking devices for sleep stage scoring compared to polysomnography. Sleep advances : a journal of the Sleep Research Society, 2025. PubMed
6. Kim K, Park DY, Song YJ, et al.. Consumer-grade sleep trackers are still not up to par compared to polysomnography. Sleep & breathing = Schlaf & Atmung, 2022. PubMed
7. Jahrami H, Trabelsi K, Pakpour A, et al.. Screening for orthosomnia: a reliability generalization meta-analysis of the Anxiety and Preoccupation about Sleep Questionnaire (APSQ). Sleep and biological rhythms, 2024. PubMed
8. Baron KG, Abbott S, Jao N, et al.. Orthosomnia: Are Some Patients Taking the Quantified Self Too Far? Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2017. PubMed

HRV: cos'è la variabilità cardiaca e perché conta per il sonno

1. Laborde S, Allen MS, Borges U, et al.. Effects of voluntary slow breathing on heart rate and heart rate variability: A systematic review and a meta-analysis. Neuroscience and biobehavioral reviews, 2022. PubMed
2. Shaffer F, Ginsberg JP. An Overview of Heart Rate Variability Metrics and Norms. Frontiers in public health, 2017. PubMed
3. Tiwari R, Kumar R, Malik S, et al.. Analysis of Heart Rate Variability and Implication of Different Factors on Heart Rate Variability. Current cardiology reviews, 2021. PubMed
4. Li K, Cardoso C, Moctezuma-Ramirez A, et al.. Heart Rate Variability Measurement through a Smart Wearable Device: Another Breakthrough for Personal Health Monitoring? International journal of environmental research and public health, 2023. PubMed
5. Miller DJ, Sargent C, Roach GD. A Validation of Six Wearable Devices for Estimating Sleep, Heart Rate and Heart Rate Variability in Healthy Adults. Sensors (Basel, Switzerland), 2022. PubMed
6. Dial MB, Hollander ME, Vatne EA, et al.. Validation of nocturnal resting heart rate and heart rate variability in consumer wearables. Physiological reports, 2025. PubMed
7. Zhang S, Niu X, Ma J, et al.. Effects of sleep deprivation on heart rate variability: a systematic review and meta-analysis. Frontiers in neurology, 2025. PubMed
8. Wang Z, Jiang F, Xiao J, et al.. Heart rate variability changes in patients with obstructive sleep apnea: A systematic review and meta-analysis. Journal of sleep research, 2023. PubMed

Frequenza cardiaca notturna: cos'è, come scende e cosa la alza

1. Nummela A, Hynynen E, Kaikkonen P, et al.. High-intensity endurance training increases nocturnal heart rate variability in sedentary participants. Biology of sport, 2016. PubMed
2. Ahokas EK, Hanstock HG, Löfberg I, et al.. Nocturnal Heart Rate Variability in Women Discordant for Hormonal Contraceptive Use. Medicine and science in sports and exercise, 2023. PubMed
3. Matias I, Daza EJ, Wac K. What possibly affects nighttime heart rate? Conclusions from N-of-1 observational data. Digital health, 2022. PubMed
4. Miller DJ, Sargent C, Roach GD. A Validation of Six Wearable Devices for Estimating Sleep, Heart Rate and Heart Rate Variability in Healthy Adults. Sensors (Basel, Switzerland), 2022. PubMed
5. Dial MB, Hollander ME, Vatne EA, et al.. Validation of nocturnal resting heart rate and heart rate variability in consumer wearables. Physiological reports, 2025. PubMed
6. Liang T, Yilmaz G, Soon CS. Deriving Accurate Nocturnal Heart Rate, rMSSD and Frequency HRV from the Oura Ring. Sensors (Basel, Switzerland), 2024. PubMed
7. Sarhaddi F, Kazemi K, Azimi I, et al.. A comprehensive accuracy assessment of Samsung smartwatch heart rate and heart rate variability. PloS one, 2022. PubMed
8. Alexander J, Sovakova M, Rena G. Factors affecting resting heart rate in free-living healthy humans. Digital health, 2022. PubMed
9. Carter M, Hua R, O'Brien MK, et al.. Autocorrelation of daily resting heart rate: A novel metric of postoperative recovery. International journal of medical informatics, 2024. PubMed

SpO2 notturna: cosa indica l'ossigenazione e come leggerla

1. John A, Nundy KK, Cardiff B, et al.. SomnNET: An SpO2 Based Deep Learning Network for Sleep Apnea Detection in Smartwatches. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference, 2021. PubMed
2. Ganglberger W, Bucklin AA, Tesh RA, et al.. Sleep apnea and respiratory anomaly detection from a wearable band and oxygen saturation. Sleep & breathing = Schlaf & Atmung, 2022. PubMed
3. Zeng Z, Li L, Hu L, et al.. Smartwatch measurement of blood oxygen saturation for predicting acute mountain sickness: Diagnostic accuracy and reliability. Digital health, 2024. PubMed
4. Wick KD, Matthay MA, Ware LB. Pulse oximetry for the diagnosis and management of acute respiratory distress syndrome. The Lancet. Respiratory medicine, 2022. PubMed
5. Moon K, Daino N, Gomez P, et al.. Pulse Oximetry-A Perioperative Perspective. Diagnostics (Basel, Switzerland), 2026. PubMed
6. Ralston AC, Webb RK, Runciman WB. Potential errors in pulse oximetry. III: Effects of interferences, dyes, dyshaemoglobins and other pigments. Anaesthesia, 1991. PubMed
7. Gallagher JJ, Adamski JL. Accuracy of Pulse-Oximetry in Non-white Patients. Critical care nursing clinics of North America, 2025. PubMed
8. Abd-Alrazaq A, Aslam H, AlSaad R, et al.. Detection of Sleep Apnea Using Wearable AI: Systematic Review and Meta-Analysis. Journal of medical Internet research, 2024. PubMed

Sleep score: cosa sono e come funzionano i punteggi dei wearable

1. Jahrami H, Trabelsi K, Pakpour A, et al.. Screening for orthosomnia: a reliability generalization meta-analysis of the Anxiety and Preoccupation about Sleep Questionnaire (APSQ). Sleep and biological rhythms, 2024. PubMed
2. Baron KG, Abbott S, Jao N, et al.. Orthosomnia: Are Some Patients Taking the Quantified Self Too Far? Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2017. PubMed
3. Addison C, Grandner MA, Baron KG. Sleep medicine provider perceptions and attitudes regarding consumer sleep technology. Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2023. PubMed
4. Ojalvo D, Pacheco AP, Benedict C. A useful tool or a new challenge? Hand-wrist-worn sleep trackers in patients with insomnia. Journal of sleep research, 2023. PubMed
5. Chiang AA, Khosla S. Consumer Wearable Sleep Trackers: Are They Ready for Clinical Use? Sleep medicine clinics, 2023. PubMed
6. Khosla S, Deak MC, Gault D, et al.. Consumer Sleep Technology: An American Academy of Sleep Medicine Position Statement. Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2018. PubMed
7. de Zambotti M, Cellini N, Menghini L, et al.. Sensors Capabilities, Performance, and Use of Consumer Sleep Technology. Sleep medicine clinics, 2020. PubMed
8. Grifantini K. How's my sleep?: Personal sleep trackers are gaining in popularity, but their accuracy is still open to debate. IEEE pulse, 2014. PubMed
9. Chalmers T, Hickey BA, Newton P, et al.. Associations between Sleep Quality and Heart Rate Variability: Implications for a Biological Model of Stress Detection Using Wearable Technology. International journal of environmental research and public health, 2022. PubMed

Come funzionano gli sleep tracker e quanto sono precisi

1. de Gans CJ, Burger P, van den Ende ES, et al.. Sleep assessment using EEG-based wearables - A systematic review. Sleep medicine reviews, 2024. PubMed
2. Abd-Alrazaq A, Aslam H, AlSaad R, et al.. Detection of Sleep Apnea Using Wearable AI: Systematic Review and Meta-Analysis. Journal of medical Internet research, 2024. PubMed
3. de Zambotti M, Cellini N, Goldstone A, et al.. Wearable Sleep Technology in Clinical and Research Settings. Medicine and science in sports and exercise, 2019. PubMed
4. Chee MW, Baumert M, Scott H, et al.. World Sleep Society recommendations for the use of wearable consumer health trackers that monitor sleep. Sleep medicine, 2025. PubMed
5. Schyvens AM, Peters B, Van Oost NC, et al.. A performance validation of six commercial wrist-worn wearable sleep-tracking devices for sleep stage scoring compared to polysomnography. Sleep advances : a journal of the Sleep Research Society, 2025. PubMed
6. Agostinho M, Borges M, Pereira T, et al.. Are Wearable Sleep-Tracking Devices Reliable Alternatives to Polysomnography? A Systematic Review and Meta-Analysis. Behavioral sleep medicine, 2026. PubMed
7. Lee T, Cho Y, Cha KS, et al.. Accuracy of 11 Wearable, Nearable, and Airable Consumer Sleep Trackers: Prospective Multicenter Validation Study. JMIR mHealth and uHealth, 2023. PubMed

Smart Ring o Smartwatch per il Sonno: Quale Scegliere?

1. Herberger S, Aurnhammer C, Bauerfeind S, et al.. Performance of wearable finger ring trackers for diagnostic sleep measurement in the clinical context. Scientific reports, 2025. PubMed
2. Niemelä M, Maijala A, Nauha L, et al.. Associations of Wearable Ring Measured Sleep, Sedentary Time, and Physical Activity With Cardiometabolic Health: A Compositional Data Analysis Approach. Scandinavian journal of medicine & science in sports, 2024. PubMed
3. Svensson T, Madhawa K, Nt H, et al.. Validity and reliability of the Oura Ring Generation 3 (Gen3) with Oura sleep staging algorithm 2.0 (OSSA 2.0) when compared to multi-night ambulatory polysomnography: A validation study of 96 participants and 421,045 epochs. Sleep medicine, 2024. PubMed
4. Asgari Mehrabadi M, Azimi I, Sarhaddi F, et al.. Sleep Tracking of a Commercially Available Smart Ring and Smartwatch Against Medical-Grade Actigraphy in Everyday Settings: Instrument Validation Study. JMIR mHealth and uHealth, 2020. PubMed
5. de Zambotti M, Rosas L, Colrain IM, et al.. The Sleep of the Ring: Comparison of the ŌURA Sleep Tracker Against Polysomnography. Behavioral sleep medicine, 2019. PubMed
6. Guo J, Luo J, Xiao Y, et al.. Validity and clinical utility of a wrist-worn device against polysomnography. PloS one, 2025. PubMed
7. Wulterkens BM, Fonseca P, Hermans LWA, et al.. It is All in the Wrist: Wearable Sleep Staging in a Clinical Population versus Reference Polysomnography. Nature and science of sleep, 2021. PubMed
8. Oura — Negozio ufficiale, anelli (Italia). ouraring.com
9. Oura — Abbonamento (membership, Italia). ouraring.com
10. Apple — Batteria di Apple Watch. apple.com

Oura Ring: cosa misura, prezzi e precisione dei sensori

1. Svensson T, Madhawa K, Nt H, et al.. Validity and reliability of the Oura Ring Generation 3 (Gen3) with Oura sleep staging algorithm 2.0 (OSSA 2.0) when compared to multi-night ambulatory polysomnography: A validation study of 96 participants and 421,045 epochs. Sleep medicine, 2024. PubMed
2. Kristiansson E, Fridolfsson J, Arvidsson D, et al.. Validation of Oura ring energy expenditure and steps in laboratory and free-living. BMC medical research methodology, 2023. PubMed
3. Henriksen A, Svartdal F, Grimsgaard S, et al.. Polar Vantage and Oura Physical Activity and Sleep Trackers: Validation and Comparison Study. JMIR formative research, 2022. PubMed
4. Niela-Vilen H, Azimi I, Suorsa K, et al.. Comparison of Oura Smart Ring Against ActiGraph Accelerometer for Measurement of Physical Activity and Sedentary Time in a Free-Living Context. Computers, informatics, nursing : CIN, 2022. PubMed
5. Miller DJ, Sargent C, Roach GD. A Validation of Six Wearable Devices for Estimating Sleep, Heart Rate and Heart Rate Variability in Healthy Adults. Sensors (Basel, Switzerland), 2022. PubMed
6. Robbins R, Weaver MD, Sullivan JP, et al.. Accuracy of Three Commercial Wearable Devices for Sleep Tracking in Healthy Adults. Sensors (Basel, Switzerland), 2024. PubMed
7. Oura — Negozio ufficiale, anelli (Italia). ouraring.com
8. Oura — Abbonamento (membership, Italia). ouraring.com

Apple Watch e Sonno: Funzioni, Affidabilità e Limiti

1. Jaworski DJ, Park EJ. Apple Watch Sleep and Physiological Tracking Compared to Clinically Validated Actigraphy, Ballistocardiography and Polysomnography. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference, 2023. PubMed
2. Jaworski D, Park EJ. Nonlinear Heart Rate Variability Analysis for Sleep Stage Classification Using Integration of Ballistocardiogram and Apple Watch. Nature and science of sleep, 2024. PubMed
3. Robbins R, Weaver MD, Sullivan JP, et al.. Accuracy of Three Commercial Wearable Devices for Sleep Tracking in Healthy Adults. Sensors (Basel, Switzerland), 2024. PubMed
4. Miller DJ, Sargent C, Roach GD. A Validation of Six Wearable Devices for Estimating Sleep, Heart Rate and Heart Rate Variability in Healthy Adults. Sensors (Basel, Switzerland), 2022. PubMed
5. Apple — Supporto: monitorare il sonno con Apple Watch. support.apple.com
6. Apple — Notifiche relative all'apnea notturna su Apple Watch. support.apple.com

Garmin e sonno: Sleep Score, Body Battery e HRV

1. Hibbing PR, Pilla M, Birmingham L, et al.. Evaluation of the Garmin Vivofit 4 for assessing sleep in youth experiencing sleep disturbances. Digital health, 2024. PubMed
2. Miller DJ, Sargent C, Roach GD. A Validation of Six Wearable Devices for Estimating Sleep, Heart Rate and Heart Rate Variability in Healthy Adults. Sensors (Basel, Switzerland), 2022. PubMed
3. Lee YJ, Lee JY, Cho JH, et al.. Performance of consumer wrist-worn sleep tracking devices compared to polysomnography: a meta-analysis. Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2025. PubMed
4. Garmin — Manuale Forerunner 265: Stato HRV. www8.garmin.com
5. Garmin — Blog: le funzioni per monitorare la salute. garmin.com
6. Garmin — Blog: perché la Body Battery è bassa. garmin.com

Integratori per il sonno: cosa dice la ricerca scientifica

1. Chan V, Lo K. Efficacy of dietary supplements on improving sleep quality: a systematic review and meta-analysis. Postgraduate medical journal, 2022. PubMed
2. Mei M, Zhou Q, Gu W, et al.. Dietary Supplement Interventions and Sleep Quality Improvement: A Systematic Review and Meta-Analysis. Nutrients, 2025. PubMed
3. Cotter J, Caddick CE, Harper JL, et al.. Examining the effect of L-theanine on sleep: a systematic review of dietary supplementation trials. Nutritional neuroscience, 2026. PubMed
4. Ali R, Tariq S, Kareem O, et al.. Nutraceuticals for Sleep Disorders. Combinatorial chemistry & high throughput screening, 2021. PubMed
5. Fatemeh G, Sajjad M, Niloufar R, et al.. Effect of melatonin supplementation on sleep quality: a systematic review and meta-analysis of randomized controlled trials. Journal of neurology, 2022. PubMed
6. Cruz-Sanabria F, Bruno S, Crippa A, et al.. Optimizing the Time and Dose of Melatonin as a Sleep-Promoting Drug: A Systematic Review of Randomized Controlled Trials and Dose-Response Meta-Analysis. Journal of pineal research, 2024. PubMed
7. Ferracioli-Oda E, Qawasmi A, Bloch MH. Meta-analysis: melatonin for the treatment of primary sleep disorders. PloS one, 2013. PubMed
8. Choi K, Lee YJ, Park S, et al.. Efficacy of melatonin for chronic insomnia: Systematic reviews and meta-analyses. Sleep medicine reviews, 2022. PubMed
9. Bruni O, Ferini-Strambi L, Giacomoni E, et al.. Herbal Remedies and Their Possible Effect on the GABAergic System and Sleep. Nutrients, 2021. PubMed
10. Commissione europea — Registro UE delle indicazioni nutrizionali e sulla salute. ec.europa.eu
11. Ministero della Salute — Integratori alimentari. salute.gov.it

Melatonina: come funziona, quando e quanta

1. Cruz-Sanabria F, Bruno S, Crippa A, et al.. Optimizing the Time and Dose of Melatonin as a Sleep-Promoting Drug: A Systematic Review of Randomized Controlled Trials and Dose-Response Meta-Analysis. Journal of pineal research, 2024. PubMed
2. Ferracioli-Oda E, Qawasmi A, Bloch MH. Meta-analysis: melatonin for the treatment of primary sleep disorders. PloS one, 2013. PubMed
3. Choi K, Lee YJ, Park S, et al.. Efficacy of melatonin for chronic insomnia: Systematic reviews and meta-analyses. Sleep medicine reviews, 2022. PubMed
4. Nogueira HA, de Castro CT, da Silva DCG, et al.. Melatonin for sleep disorders in people with autism: Systematic review and meta-analysis. Progress in neuro-psychopharmacology & biological psychiatry, 2023. PubMed
5. Samel A. Melatonin and jet-lag. European journal of medical research, 1999. PubMed
6. Arendt J, Skene DJ, Middleton B, et al.. Efficacy of melatonin treatment in jet lag, shift work, and blindness. Journal of biological rhythms, 1997. PubMed
7. Tortorolo F, Farren F, Rada G. Is melatonin useful for jet lag? Medwave, 2015. PubMed
8. Croughs RJ, de Bruin TW. Melatonin and jet lag. The Netherlands journal of medicine, 1996. PubMed
9. Minich DM, Henning M, Darley C, et al.. Is Melatonin the "Next Vitamin D"?: A Review of Emerging Science, Clinical Uses, Safety, and Dietary Supplements. Nutrients, 2022. PubMed
10. Andersen LP, Gögenur I, Rosenberg J, et al.. The Safety of Melatonin in Humans. Clinical drug investigation, 2016. PubMed
11. Commissione europea — Registro UE delle indicazioni nutrizionali e sulla salute. ec.europa.eu
12. Ministero della Salute — Integratori alimentari. salute.gov.it

Magnesio e sonno: cosa dice davvero la ricerca

1. Arab A, Rafie N, Amani R, et al.. The Role of Magnesium in Sleep Health: a Systematic Review of Available Literature. Biological trace element research, 2023. PubMed
2. Mah J, Pitre T. Oral magnesium supplementation for insomnia in older adults: a Systematic Review & Meta-Analysis. BMC complementary medicine and therapies, 2021. PubMed
3. Abbasi B, Kimiagar M, Sadeghniiat K, et al.. The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial. Journal of research in medical sciences : the official journal of Isfahan University of Medical Sciences, 2012. PubMed
4. Hausenblas HA, Lynch T, Hooper S, et al.. Magnesium-L-threonate improves sleep quality and daytime functioning in adults with self-reported sleep problems: A randomized controlled trial. Sleep medicine: X, 2024. PubMed
5. Capozzi A, Scambia G, Lello S. Calcium, vitamin D, vitamin K2, and magnesium supplementation and skeletal health. Maturitas, 2020. PubMed
6. Tarsitano MG, Quinzi F, Folino K, et al.. Effects of magnesium supplementation on muscle soreness in different type of physical activities: a systematic review. Journal of translational medicine, 2024. PubMed
7. Commissione europea — Registro UE delle indicazioni nutrizionali e sulla salute. ec.europa.eu
8. Ministero della Salute — Integratori alimentari. salute.gov.it

Glicina e sonno: cosa dice la ricerca

1. Bannai M, Kawai N. New therapeutic strategy for amino acid medicine: glycine improves the quality of sleep. Journal of pharmacological sciences, 2012. PubMed
2. Kawai N, Sakai N, Okuro M, et al.. The sleep-promoting and hypothermic effects of glycine are mediated by NMDA receptors in the suprachiasmatic nucleus. Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 2015. PubMed
3. Fan Z, Nelson JM, Wallace TC. Glycine Bioavailability and Sleep-Related Outcomes Following Oral Glycine and Collagen Supplementation-A Scoping Review. Journal of dietary supplements, 2026. PubMed
4. Commissione europea — Registro UE delle indicazioni nutrizionali e sulla salute. ec.europa.eu

L-teanina e sonno: cosa dice la ricerca scientifica

1. Bulman A, D'Cunha NM, Marx W, et al.. The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis. Sleep medicine reviews, 2025. PubMed
2. Payne ER, Aceves-Martins M, Dubost J, et al.. Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Nutrition reviews, 2025. PubMed
3. Kim S, Jo K, Hong KB, et al.. GABA and l-theanine mixture decreases sleep latency and improves NREM sleep. Pharmaceutical biology, 2019. PubMed
4. Cotter J, Caddick CE, Harper JL, et al.. Examining the effect of L-theanine on sleep: a systematic review of dietary supplementation trials. Nutritional neuroscience, 2026. PubMed
5. Hidese S, Ogawa S, Ota M, et al.. Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial. Nutrients, 2019. PubMed
6. Williams JL, Everett JM, D'Cunha NM, et al.. The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review. Plant foods for human nutrition (Dordrecht, Netherlands), 2020. PubMed
7. Moulin M, Crowley DC, Xiong L, et al.. Safety and Efficacy of AlphaWave® L-Theanine Supplementation for 28 Days in Healthy Adults with Moderate Stress: A Randomized, Double-Blind, Placebo-Controlled Trial. Neurology and therapy, 2024. PubMed
8. Rizzo R, Prato A, Scerbo M, et al.. Use of Nutritional Supplements Based on L-Theanine and Vitamin B6 in Children with Tourette Syndrome, with Anxiety Disorders: A Pilot Study. Nutrients, 2022. PubMed
9. Commissione europea — Registro UE delle indicazioni nutrizionali e sulla salute. ec.europa.eu

Valeriana per il sonno: cosa dice la scienza

1. Bent S, Padula A, Moore D, et al.. Valerian for sleep: a systematic review and meta-analysis. The American journal of medicine, 2006. PubMed
2. Shinjyo N, Waddell G, Green J. Valerian Root in Treating Sleep Problems and Associated Disorders-A Systematic Review and Meta-Analysis. Journal of evidence-based integrative medicine, 2020. PubMed
3. Valente V, Machado D, Jorge S, et al.. Does valerian work for insomnia? An umbrella review of the evidence. European neuropsychopharmacology : the journal of the European College of Neuropsychopharmacology, 2024. PubMed
4. Stevinson C, Ernst E. Valerian for insomnia: a systematic review of randomized clinical trials. Sleep medicine, 2000. PubMed
5. Bao H, Pan X, Tao Q, et al.. Safety evaluation of aqueous extract from Valeriana officinalis L. roots: Genotoxicity, acute, subchronic and teratology toxicity. Journal of ethnopharmacology, 2024. PubMed
6. Vo LT, Chan D, King RG. Investigation of the effects of peppermint oil and valerian on rat liver and cultured human liver cells. Clinical and experimental pharmacology & physiology, 2003. PubMed
7. Xu K, Lin Y, Zhang R, et al.. Evaluation of safety of iridoids rich fraction from Valeriana jatamansi Jones: Acute and sub-chronic toxicity study in mice and rats. Journal of ethnopharmacology, 2015. PubMed
8. Morin CM, Koetter U, Bastien C, et al.. Valerian-hops combination and diphenhydramine for treating insomnia: a randomized placebo-controlled clinical trial. Sleep, 2005. PubMed
9. Fernández-San-Martín MI, Masa-Font R, Palacios-Soler L, et al.. Effectiveness of Valerian on insomnia: a meta-analysis of randomized placebo-controlled trials. Sleep medicine, 2010. PubMed
10. European Medicines Agency — Valerianae radix (monografia HMPC). ema.europa.eu
11. Commissione europea — Registro UE delle indicazioni nutrizionali e sulla salute. ec.europa.eu

Calcolatore caffeina

1. EFSA NDA Panel — Scientific Opinion on the safety of caffeine. EFSA Journal, 2015. doi.org
2. EUFIC — Caffeine levels in different foods and drinks (valori EFSA 2015). eufic.org
3. Gardiner C, Weakley J, Burke LM, et al.. The effect of caffeine on subsequent sleep: A systematic review and meta-analysis Sleep medicine reviews, 2023. PubMed
4. Drake C, Roehrs T, Shambroom J, et al.. Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2013. PubMed
5. Somani SM, Gupta P. Caffeine: a new look at an age-old drug International journal of clinical pharmacology, therapy, and toxicology, 1988. PubMed
6. Puri BK, Heard CR, Monro JA. Is there a sex difference in adult salivary clearance of caffeine (1,3,7-trimethylpurine-2,6-dione)? Journal of oral biology and craniofacial research, 2020. PubMed
7. Whitsett TL, Manion CV, Christensen HD. Cardiovascular effects of coffee and caffeine The American journal of cardiology, 1984. PubMed
8. Abernethy DR, Todd EL. Impairment of caffeine clearance by chronic use of low-dose oestrogen-containing oral contraceptives European journal of clinical pharmacology, 1985. PubMed
9. Knutti R, Rothweiler H, Schlatter C. The effect of pregnancy on the pharmacokinetics of caffeine Archives of toxicology. Supplement. = Archiv fur Toxikologie. Supplement, 1982. PubMed

Calcolatore dell'efficienza del sonno

1. Ohayon M, Wickwire EM, Hirshkowitz M, et al.. National Sleep Foundation's sleep quality recommendations: first report Sleep health, 2017. PubMed

Diario del sonno

1. Carney CE, Buysse DJ, Ancoli-Israel S, et al.. The consensus sleep diary: standardizing prospective sleep self-monitoring Sleep, 2012. PubMed
2. Ohayon M, Wickwire EM, Hirshkowitz M, et al.. National Sleep Foundation's sleep quality recommendations: first report Sleep health, 2017. PubMed

Calcolatore del sonno

1. Consensus Conference Panel, Watson NF, Badr MS, et al.. Recommended Amount of Sleep for a Healthy Adult: A Joint Consensus Statement of the American Academy of Sleep Medicine and Sleep Research Society Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2015. PubMed