Why longevity experts are talking about sleep

Interest in healthy aging is reaching beyond the doctor’s office. McKinsey’s 2025 consumer research reports growing demand for longevity products and services. Nutrition, exercise, strength training and stress management are familiar starting points. Sleep deserves a place, too. In 2022, the American Heart Association added sleep to its checklist for cardiovascular health, formally placing it alongside diet and physical activity. That recognition brings sleep into a conversation often focused on daytime habits.

Below, Sleeping.com, a provider of home sleep testing and sleep apnea products, explores a broader question: What role does sleep actually play in how we age?

There is no simple exchange of extra hours in bed for extra years of life. What matters is how sleep supports the health and abilities people want to preserve.

What Happens to Sleep as We Age?

Sleep that once felt uninterrupted may become lighter or more broken. According to MedlinePlus, older adults generally spend less time in deep sleep and wake more often. These changes affect sleep architecture, meaning the pattern of sleep stages across the night, and can make sustained sleep harder.

Timing can change as well. The National Heart, Lung, and Blood Institute explains that body clocks change with age, contributing to earlier waking and difficulty staying asleep. An earlier bedtime may therefore reflect a shifting internal schedule.

Some change is expected; persistent difficulty deserves a closer look. MedlinePlus also notes that pain, medications, and health conditions can interfere with sleep. Accepting a different sleep pattern should not mean dismissing ongoing exhaustion as an unavoidable part of getting older.

Why Sleep Matters for Healthy Aging

The body remains busy during sleep. The NHLBI describes how sleep and circadian timing interact with hormones, metabolism, and immune function. Insufficient sleep can affect how the body responds to insulin, the hormone that regulates blood sugar. Immune activity also follows daily rhythms. During non-REM sleep, heart rate and blood pressure normally decline.

When announcing the American Heart Association’s updated checklist, cardiologist Donald Lloyd-Jones pointed to research connecting healthier sleep with better management of weight, blood pressure and diabetes risk. Sleep is part of that assessment, alongside other health behaviors and risk factors.

Sleep also matters on difficult days. Sleep deficiency can make managing emotions and coping with change harder, according to the NHLBI. That ability to cope is part of everyday quality of life.

None of this means that better sleep, by itself, will prevent a particular disease.

The Connection Between Sleep and Physical Resilience 

For someone working to stay strong, recovery belongs in the conversation alongside exercise. Deep sleep helps trigger the release of growth hormone, which supports muscle, cell, and tissue repair in adults, according to the NHLBI. That makes rest relevant to the work of staying active.

By morning, the effects may be easier to notice. Sleep deficiency can bring fatigue and slower reaction times, affecting how well people function during the day. Research links sleepiness with less motivation to exercise, while a study in young adults found sleep loss could disrupt coordination while walking.

The CDC recommends that older adults include strength and balance activities alongside aerobic movement. Recovery deserves attention alongside those efforts to maintain physical independence.

For someone hoping to keep carrying groceries, climbing stairs, or enjoying a favorite activity, maintaining those abilities is a meaningful goal. Years lived tell only part of the story.

Sleep, the Brain and the Aging Process

Remembering information and staying focused are everyday concerns. The NHLBI explains that sleep supports learning and long-term memory, while inadequate or poor-quality sleep can interfere with concentration and clear thinking.

The longer-term findings require more careful interpretation. A 2021 study in Nature Communications followed 7,959 participants for about 25 years. Persistently short sleep, six hours or less, at ages 50, 60 and 70 was associated with a 30% higher dementia risk compared with consistently sleeping seven hours, after adjustment for several other factors.

That figure describes relative risk, not a 30-percentage-point increase in an individual’s likelihood of dementia. The observational study also cannot establish that short sleep caused dementia or that extending sleep would prevent it.

For readers concerned about brain health, that is a reason to take sleep seriously without treating it as a guarantee. Consistent, restorative sleep is one part of the picture, not a standalone defense against neurological disease. The National Institute on Aging also highlights exercise and blood pressure management as considerations for cognitive health.

What Healthy Sleep Looks Like at Different Ages

There is no universal bedtime. The CDC lists seven or more hours for adults ages 18-60, seven to nine for ages 61-64, and seven to eight for those 65 and older. These ranges provide context rather than a nightly performance target.

Duration is only one consideration. The CDC emphasizes uninterrupted and refreshing sleep and recommends consistent bedtimes and wake times. Allowing adequate time for sleep and noticing daytime alertness are more useful than assuming longer always means better.

Persistent awakenings, significant changes in sleep quality, or ongoing daytime sleepiness warrant discussion with a healthcare professional. Chronic loud snoring deserves attention, too: the NHLBI identifies snoring and daytime sleepiness as possible sleep apnea symptoms, especially when accompanied by gasping or breathing pauses.

A sleep diary can help organize that conversation. Recording bedtimes, awakenings, naps, medications, and caffeine or alcohol use gives a clinician more detail than “I slept badly.” The point is to identify a recurring pattern and its possible contributors, rather than judge an entire week by one restless night or one unusually good morning.

Sleep Belongs in the Longevity Conversation

Sleep offers no formula for a longer life. But its connections to recovery and functioning, alongside its roles in cognition and metabolic health, make it hard to leave out of a discussion about aging well. The goal is adequate, restorative rest that supports both long-term health and everyday quality of life.

This story was produced by Sleeping.com and reviewed and distributed by Stacker.