If a new drug were discovered that lowered cardiovascular risk, improved insulin sensitivity, lowered blood pressure, enhanced immune function, and improved cognitive performance — with no side effects — it would be the biggest medical story of the decade. That drug already exists. It is called sleep.
Despite strong evidence that sleep quality and duration are independent cardiovascular risk factors, many physicians spend little or no time asking about sleep during an annual physical. This is one of the most consequential blind spots in preventive medicine.
The evidence
Sleep duration follows a U-shaped curve for cardiovascular risk. Both too little and too much sleep are associated with worse outcomes — but short sleep is far more common among working adults, and it is often self-imposed.
A meta-analysis of 15 prospective studies covering over 470,000 participants (Cappuccio, 2011) found that short sleepers had a 48% increased risk of developing or dying from coronary heart disease and a 15% greater risk of stroke compared with people sleeping a normal amount. Long sleep was also associated with higher risk, which is why the curve is U-shaped.
But duration is only part of the story. Sleep quality — fragmentation, sleep-disordered breathing (especially obstructive sleep apnea), and circadian disruption — may matter even more.
Sleep apnea: the hidden epidemic
In US population data, moderate-to-severe obstructive sleep apnea (OSA) affects about 10–17% of men and 3–9% of women aged 30 to 70, rising with age; milder forms are considerably more common. Worldwide, an estimated 425 million adults aged 30–69 have moderate-to-severe OSA. In people with metabolic syndrome or obesity, the prevalence is higher still. Many cases are thought to be undiagnosed.
OSA is not just snoring. It is repeated episodes of airway collapse during sleep, each causing a surge of adrenaline, a spike in blood pressure, and a drop in blood oxygen. Over months and years, this nightly stress response drives hypertension, atrial fibrillation, heart failure, and stroke.
The challenge is that most people with OSA do not know they have it. They may feel tired during the day, but they attribute it to stress or aging. Their bed partner may notice loud snoring or pauses in breathing, but many people sleep alone. Without asking about sleep — specifically, about snoring, daytime fatigue, and observed apneas — the condition remains invisible.
A reasonable approach
A good preventive check-up includes a structured sleep assessment, not just a passing question. Validated tools such as the STOP-Bang questionnaire screen for OSA risk in a few minutes, alongside questions about sleep duration, quality, and patterns.
The physician can then put the answers in context with the clinical examination: neck circumference, BMI, blood pressure pattern, and HbA1c all add information. If OSA is suspected, the next step is a home sleep study or referral for polysomnography in a sleep laboratory.
Why this matters for people in demanding jobs
High-performing professionals are disproportionately affected by sleep problems — irregular schedules, frequent travel across time zones (see jet lag and cardiovascular risk), high stress, and a culture that treats sleep deprivation as a badge of honor. If this describes your working life, there is a good chance your sleep deserves clinical attention.
Useful recommendations are specific — not generic "sleep hygiene" tips, but guidance based on the individual risk profile. When OSA is suspected, it is worth asking your doctor directly about a sleep study; if the diagnosis is confirmed, effective treatments exist (CPAP, oral appliances, or surgical options depending on severity).
References
- Cappuccio FP, et al. Sleep duration predicts cardiovascular outcomes: a systematic review and meta-analysis of prospective studies. Eur Heart J. 2011;32(12):1484-1492.
- Benjafield AV, et al. Estimation of the global prevalence and burden of obstructive sleep apnoea: a literature-based analysis. Lancet Respir Med. 2019;7(8):687-698.
- Peppard PE, et al. Increased prevalence of sleep-disordered breathing in adults. Am J Epidemiol. 2013;177(9):1006-1014.
- Javaheri S, et al. Sleep apnea: types, mechanisms, and clinical cardiovascular consequences. J Am Coll Cardiol. 2017;69(7):841-858.
This article is general information and not individual medical advice. Decisions about tests and treatment belong in a conversation with your own physician.