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Flicker Stage of Aging: Kaplan & Riley’s New Theory

Stuart Kaplan & Marcus Riley introduce the 'flicker stage,' a revolutionary concept challenging linear aging. Discover how lifestyle and mindset can shift your functional age.

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Two adults ride bicycles with pannier bags along a tree-lined park path, wearing helmets and smiling at each other.

New book argues aging can “flicker” — can lifestyle and mindset briefly reverse your functional age?

In Your Aging Advantage, Stuart Kaplan and Marcus Riley propose a “flicker stage”—moments when functional or “feels-like” age shifts. They argue lifestyle changes and mindset can briefly reverse how young or old someone feels daily.

  • Flicker stage: Authors Stuart Kaplan and Marcus Riley describe a stage in which people move between younger- and older-feeling states driven by life events, habits and mindset; see the Fox News video interview with the authors.
  • Triggers matter: Physical, psychological, social or environmental “flicker triggers” — for example, exercise or renewed social connection — can reset someone’s pace of aging, the authors say.
  • Science vs. metaphor: Laboratory work on sensory flicker thresholds and epigenetic age markers suggests biological plasticity but does not directly validate the book’s seven-stage behavioral model; see linked studies below.

What the authors say: aging as a moving target

Kaplan and Riley present aging as less like a straight line and more like a series of shifting states. They name one of their seven stages the flicker stage, describing moments when people suddenly feel much younger or older than their chronological age.

Key idea: identify and leverage flicker triggers — actions or changes (exercise, social reconnection, mental shifts) that move a person back toward greater vitality. As Marcus Riley told the media, setbacks and stress can make people feel older, while positive interventions can allow someone to “flicker back” to a younger functional state; Stuart Kaplan compared it to weather, where humidity makes temperature feel different from the thermometer reading (Fox News video interview).

“Shift from ‘aging in place’ to ‘aging on pace’ — focus on personal goals rather than fixed retirement markers such as age 65,” the authors urge.

How the idea lines up with science

Important distinction: the book’s flicker stage is primarily behavioral and metaphorical, describing subjective and functional shifts. Scientific research points to related but distinct biological and sensory findings.

Sensory markers

Studies of visual function track flicker modulation thresholds — how well people detect flickering light. Those thresholds are relatively stable until about age 45 and then decline; researchers study them as markers for eye disease and aging. This work concerns sensory function rather than the lived-age shifts Kaplan and Riley describe. See the visual flicker research.

Cellular and epigenetic studies

Laboratory experiments have shown some cellular features of aging can be reversed in controlled settings. For example, partial epigenetic reprogramming has restored youthful gene-expression patterns in cells within days. These are early, laboratory-based findings and do not map directly onto the book’s behavioral seven-stage model; see work on epigenetic age reversal and broader biotech reporting from Life Biosciences.

Gaps between metaphor and mechanism

The flicker metaphor helps people notice what makes them feel younger or older. However, peer‑reviewed evidence that short-term lifestyle interventions reliably flip people between defined aging stages is limited. For now, laboratory science and lived experience run in parallel rather than fully overlapping.

What’s missing in outside reporting

Media coverage to date centers on the flicker stage summary provided by the authors in interviews and promotional material. A review finds the Fox News video and related appearances are the main public summaries; the full list of seven stages and their detailed descriptions are not widely available online. Readers and reporters should consult the book for fuller context.

Practical examples: How a flicker might look in daily life

Kaplan and Riley cite everyday scenarios. A person who loses a partner, confronts illness or faces job stress may suddenly feel much older. If that same person later begins walking daily, joins a club, or rediscovers purpose in a hobby, they may feel years younger — a brief flicker back toward vitality. The authors encourage readers to identify personal flicker triggers and use them intentionally.

Implications for San Diego, California

Economic impact

  • Workforce and retirement choices: An “aging on pace” mindset could keep San Diego’s older workers — in biotech, defense, education and tourism — employed longer or returning to work, affecting hiring, benefits and retirement planning.
  • Health and wellness market: Demand for age-friendly fitness, wellness programs and community classes may rise if residents pursue flicker triggers like exercise and social connection.

Political consequences

  • Policy and services: County policymakers might face calls to fund programs that promote functional health across ages — community centers, transit options, adult education and preventive health services.
  • Voter and civic engagement: If more residents feel younger and stay active longer, civic participation among older adults could remain high, shaping local elections and advocacy.

Social effects

  • Intergenerational ties: Emphasizing social connection could spur programs that mix ages — mentorships, shared workspaces and community learning.
  • Community resilience: Identifying personal flicker triggers may lead to greater volunteerism and neighborhood cohesion.

Cultural relevance

San Diego’s active outdoor lifestyle — beaches, parks and trails — makes physical activity accessible, a core flicker trigger. Programs pairing gentle exercise with social opportunities (walking clubs, beach yoga) might help residents “flicker back” to younger-feeling stages. The region’s innovation and military histories also align with phased retirement and purposeful work models.

Practical applications for residents

  • Personal action: Track what makes you feel younger or older; try increasing daily movement, reconnecting with friends, exploring new activities or seeking mental-health support after setbacks.
  • Employers and health systems: Pilot programs targeting flicker triggers — workplace wellness, social prescriptions, community-based exercise classes — and measure outcomes like felt age, mobility and job retention.

Reporting and source notes

This article draws on interviews and promotional material summarized in the Fox News video, which outlines the flicker stage and related concepts. Scientific context on sensory aging and epigenetic reversal comes from published research and biotech reporting: visual flicker research; epigenetic reprogramming study; and biotech information from Life Biosciences.

For San Diego readers: the primary source for the flicker stage concept is the book Your Aging Advantage. Reporters and residents who want to weigh the idea against scientific evidence should consult peer‑reviewed papers and local health professionals; the links above provide starting points.

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Kevin Morgan

Kevin Morgan is a veteran of the healthcare industry with decades of experience in science, research, and health innovation, including work as a government consultant. He covers health with an evidence-based, community-focused perspective while also following food and dining, politics, elections, and sports. An avid runner, Kevin values active, healthy living.

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