Despite the expression, “I'm going to power down before bed,” your body isn't powering down at all during sleep. Sleep is one of the most biologically active periods of the day, supporting nearly every process involved in healthspan and longevity.
While you sleep, your body regulates hormones, consolidates memories, repairs tissues, strengthens immune function, and helps maintain healthy cardiovascular and metabolic systems. When sleep is consistently disrupted or inadequate, those processes gradually become less efficient, contributing to increased risks of cardiovascular disease, metabolic dysfunction, cognitive decline, and other chronic conditions. [1, 2]
While genetics and aging do affect various aspects of health, sleep remains one of the most modifiable behaviors affecting your longevity. At Biograph, sleep is one of five foundational pillars we use to help members improve long-term health. Rather than simply asking how many hours someone sleeps, we evaluate sleep quality, consistency, recovery, and potential sleep disorders as part of a broader preventive health strategy.
What is sleep health?
When it comes to assessing your sleep health and how restorative your sleep is, it’s helpful to consider the following factors:
Sleep duration: Are you consistently getting enough sleep?
Sleep quality: Do you remain asleep long enough to complete restorative sleep cycles?
Sleep efficiency: How much of your time in bed is actually spent sleeping?
Sleep consistency: Do you maintain a regular sleep-wake schedule?
Circadian rhythm: Does your sleep align with your body's natural biological clock?
Getting enough sleep is important, but quantity alone doesn't determine whether your sleep is restorative. For example, someone who sleeps eight hours but wakes up repeatedly throughout the night may have poorer sleep health than someone sleeping seven uninterrupted hours.
Why is sleep important for longevity?
Sleep affects nearly every biological system involved in healthy aging. During healthy sleep, the body:
Over months and years, consistently poor sleep increases cumulative physiologic stress.
Unlike many chronic disease risk factors that develop silently, sleep often provides an opportunity for earlier intervention because it’s both measurable and modifiable.
Research consistently suggests that it can. Large population studies have found that both insufficient sleep and chronically disrupted sleep are associated with higher all-cause mortality and increased risk of cardiovascular disease. [3, 4]
That’s not to say one night of poor sleep will negatively affect your longevity. But months, or even years, of it will.
How does sleep affect heart health?
The relationship between sleep and cardiovascular health is remarkably strong.
During healthy sleep, blood pressure naturally declines, and the cardiovascular system enters an important period of recovery. So when sleep is chronically shortened or fragmented, the body can remain stuck in a heightened state of physiologic activation.
Over time, this may contribute to:
Elevated blood pressure
Increased inflammation
Insulin resistance
Weight gain
Higher risk of coronary artery disease
Increased risk of stroke
Studies show that getting inadequate and non-restorative sleep nightly may contribute to higher LDL cholesterol and increased body weight, among other factors that can negatively affect your cardiovascular health. [5, 6]
In other words, sleep is a vital component of cardiovascular prevention, alongside exercise, nutrition, and smoking cessation.
Does sleep impact metabolic health?
Yes, sleep and metabolism are deeply interconnected. Poor sleep alters hormones involved in appetite regulation — specifically ghrelin, orexin, leptin, and insulin — which may increase your likelihood of consuming excess calories while simultaneously reducing insulin sensitivity. [7]
Sleep loss has also been associated with:
Higher fasting glucose
Increased insulin resistance
Greater visceral fat accumulation
Increased obesity risk
The connection between sleep and brain health
Sleep is also essential for cognitive health.
Growing evidence suggests that chronic sleep disruption contributes to cognitive decline and may increase dementia risk by promoting the accumulation of beta-amyloid proteins associated with Alzheimer's disease. [9]
Sleep also supports:
Memory consolidation
Learning
Executive function
Emotional regulation
Attention
The same cardiovascular risk factors that affect the heart, including hypertension, diabetes, inflammation, and obesity, also affect brain aging. [10]
This reinforces one of the central principles of preventive medicine: What's good for your heart is often good for your brain, too.
What are the most effective healthy sleep habits?
Good sleep rarely calls for one intervention. Improving your sleep health requires you to follow good sleep hygiene habits consistently. Some of the most effective strategies include:
Maintain a consistent bedtime and wake time, even on weekends.
Keep the bedroom cool, dark, and quiet.
Limit screen time for at least 30 minutes before bed.
Avoid large meals and alcohol close to bedtime.
Limit caffeine later in the day.
Exercise regularly, while avoiding vigorous exercise immediately before bed.
Small improvements performed consistently often produce more durable benefits than dramatic short-term changes.
When to seek help for sleep problems
Occasional poor sleep is normal and not often a reason to sound any alarms. But persistent sleep problems deserve evaluation. Consider speaking with a healthcare professional if you regularly experience:
Difficulty falling asleep
Frequent nighttime awakenings
Loud snoring or witnessed pauses in breathing (this could be a sign of sleep apnea)
Excessive daytime fatigue
Morning headaches
Difficulty concentrating despite adequate time in bed
These symptoms may indicate an underlying sleep disorder such as insomnia or obstructive sleep apnea, both of which are treatable.
How Biograph evaluates sleep health
At Biograph, sleep is evaluated as part of a broader picture of long-term health rather than as an isolated issue.
Assessment begins with validated sleep questionnaires and at-home, FDA-cleared,wearable sleep testing that can identify signals consistent with disorders such as obstructive sleep apnea. This wearable data is interpreted by fellowship-trained Sleep Medicine clinicians and direct consultation is provided with recommendations for next-step assessment and treatment, as indicated.
Sleep findings are interpreted alongside other health data, including cardiovascular risk factors, metabolic biomarkers, body composition, VO2 max, mental health screening, and lifestyle habits. This integrated approach helps identify the underlying contributors to poor sleep rather than focusing solely on nighttime symptoms.
Recommendations and interventions may include cognitive behavioral therapy for insomnia (CBT-I), prescriptions for devices or appliances, stress management strategies, nutritional counseling, exercise programming, or clinician-guided use of supplements such as magnesium, glycine, or melatonin.
The bottom line
Sleep is one of the most powerful, yet overlooked, drivers of longevity.
Healthy sleep supports cardiovascular function, metabolic health, cognitive performance, immune function, and physical recovery throughout your life. While it may have been drilled into your head that eight hours of sleep nightly is the key to longevity, sleep quality also needs to be taken into account.
The most effective approach isn't chasing a perfect number of hours each night. It's building consistent sleep habits, identifying treatable sleep disorders, and understanding how sleep fits within your broader health profile.
At Biograph, sleep is viewed as one of the foundational pillars of preventive medicine because improving sleep often improves many of the same biologic systems that determine long-term healthspan.
What is sleep health?
Sleep health refers to more than sleep duration. It includes sleep quality, efficiency, consistency, timing, and whether you regularly get restorative sleep that supports overall physical and mental health.
How much sleep do adults need?
Most adults should aim for 7 to 9 hours of sleep per night, although individual needs vary. What’s just as important is obtaining consistent, high-quality sleep on a regular schedule.
Can poor sleep shorten your lifespan?
Research has linked chronic poor sleep with increased risks of cardiovascular disease, metabolic dysfunction, cognitive decline, and all-cause mortality. While occasional poor sleep is unlikely to have lasting effects, persistent sleep disruption may negatively affect long-term health.
How does sleep affect heart health?
Sleep helps regulate blood pressure, inflammation, glucose metabolism, and cardiovascular system recovery. Poor sleep is associated with higher risks of hypertension, coronary artery disease, heart attack, and stroke.
When should I see a doctor about sleep problems?
If you regularly have difficulty falling asleep, wake frequently during the night, snore loudly, experience excessive daytime sleepiness, or continue feeling tired despite adequate time in bed, it's worth discussing your symptoms with a healthcare professional to evaluate for conditions such as insomnia or sleep apnea.
Dr. Michael Doney is Biograph’s Executive Medical Director, with over 20 years of experience leading clinical care and advancing a more proactive, data-driven approach to medicine.
Clinical references
Thanyaporn Direksunthorn. Sleep and Cardiometabolic Health: A Narrative Review of Epidemiological Evidence, Mechanisms, and Interventions. PubMed. 2025;18:5831-5843. doi:10.2147/ijgm.s563616
Ma Y, Liang L, Zheng F, Shi Le, Zhong B, Xie W. Association Between Sleep Duration and Cognitive Decline. JAMA Network Open. 2020;3(9):e2013573. doi:10.1001/jamanetworkopen.2020.13573
Itani O, Jike M, Watanabe N, Kaneita Y. Short sleep duration and health outcomes: a systematic review, meta-analysis, and meta-regression. Sleep Medicine. 2017;32:246-256. doi:10.1016/j.sleep.2016.08.006
Lloyd-Jones DM, Allen NB, Anderson CAM, et al. Life’s Essential 8: Updating and Enhancing the American Heart Association’s Construct of Cardiovascular Health: a Presidential Advisory from the American Heart Association. Circulation. 2022;146(5). doi:10.1161/cir.0000000000001078
Yamada T, Yamamoto Y, Toragai R, et al. Association of sleep duration and quality with small dense low-density lipoprotein cholesterol. Journal of Clinical Lipidology. 2026;20(3):578-586. doi:10.1016/j.jacl.2025.12.020
Beccuti G, Pannain S. Sleep and obesity. Current opinion in clinical nutrition and metabolic care. 2011;14(4):402-412. doi:10.1097/MCO.0b013e3283479109
Liu S, Wang X, Zheng Q, Gao L, Sun Q. Sleep Deprivation and Central Appetite Regulation. Nutrients. 2022;14(24):5196. doi:10.3390/nu14245196
Mahesh A, Rajpoot A. Trends in Sleep Disturbances Among Older Adults: A Secondary Analysis of the National Health Interview Survey (NHIS). Cureus. Published online November 16, 2025. doi:10.7759/cureus.96980
Irwin MR, Vitiello MV. Implications of sleep disturbance and inflammation for Alzheimer’s disease dementia. The Lancet Neurology. 2019;18(3):296-306. doi:10.1016/s1474-4422(18)30450-2
Angoff R, Himali JJ, Maillard P, et al. Relations of Metabolic Health and Obesity to Brain Aging in Young to Middle‐Aged Adults. Journal of the American Heart Association. 2022;11(6). doi:10.1161/jaha.121.022107
