Sleep Archive

Social media influencers blame “high cortisol” for an array of problems, from stubborn belly fat to poor sleep. But true cortisol disorders are rare and most people have no evidence that abnormal cortisol levels are driving such problems.

People on levothyroxine sometimes notice trouble sleeping, raising concerns about how long it will persist and whether dose changes could improve rest.

The term “longevity” encompasses both living longer and staying in good health. Research consistently indicates that five lifestyle pillars promote longevity: movement, nutrition, sleep, stress reduction, and socialization. But it’s impossible to gauge which pillar counts most toward longevity.

Gray divorce—which involves couples ages 50 and older ending their marriage—has become more common over the past 30 years. While divorce increases the odds of mental and physical health problems at any age, older adults face heightened health risks during a stage when many people already have chronic conditions.

Longevity (or healthspan) specialists focus on preventing age-related disease and extending people’s healthy years, rather than waiting to treat illness once it appears. Ideally, a longevity specialist focuses on proven health fundamentals before supplements and experimental therapies.

A 2026 study suggested that feeling lonely was consistently linked to worsening cognitive health and a shorter life among older adults, even after accounting for social isolation.

There are things our bodies do so often and so automatically that we barely notice them. Yawning, growling stomachs, and runny noses are good examples. Each is a universal part of our daily human experience — but did you ever wonder why?

A small, short-term 2026 study suggests that people who schedule their exercise to align with their chronotype—the body’s natural sleep and wake cycle—may lower their heart risk factors more than those who exercise at times that don’t align with their chronotype.

Sleep comes in two different forms: REM (dreaming) and non‑REM (quiet) sleep. In quiet sleep, your brain shifts from chaotic awake activity into calm, rhythmic waves as if a switch has been flipped. In a healthy night, you glide through three deepening stages of non‑REM (N1, N2, N3 slow‑wave sleep) before diving into vivid REM dreams.

People’s energy levels typically decrease later in life as a result of aging, illness, or other factors. Fortunately, a healthier lifestyle can boost energy. That involves eating a diet low in added sugars and processed foods, getting seven to nine hours of sleep each night, managing stress, getting lots of aerobic exercise, and strengthening the muscles. Using physical energy frugally is another useful strategy. For example, it helps to perform activities at a slow, steady pace instead of a fast pace; to break activities into small tasks instead of one large job; and to rest between tasks.