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Part two of this dive into the science of longevity explores lifestyle strategies that support healthspan through metabolic, cardiovascular, cognitive and functional aging risk reduction
By Joe DeLoach, OD
August 17, 2026
Quick summary:
- Reviews evidence-based lifestyle interventions commonly emphasized in longevity medicine, including exercise, resistance training, nutrition, sleep and stress regulation.
- Connects modifiable behaviors to chronic disease risk, with attention to cardiovascular, metabolic, neurocognitive and inflammatory pathways.
- Frames prevention as part of clinical counseling, offering practical talking points for supporting patients’ long-term health and functional aging.
We can’t control our genes or random bad luck. But modern science is clear: day-to-day choices can meaningfully extend your healthspan, your years lived in good health.
Longevity experts focus on slowing the aging process itself by targeting mechanisms like chronic inflammation (the master disease etiology), mitochondrial decline and epigenetic dysfunction. This includes attempted prevention of the “big four killer”: cardiovascular disease, cancer, metabolic disease (diabetes) and neurodegeneration.
Here are 12 fundamental strategies that align with new ideas popular among today’s longevity scientists. It’s good personal advice, and it’s also valuable to share with patients. It shows you’re invested in their overall wellbeing and health. Your own preventative approach to health care as a trusted eye care provider could make a positive impact on their healthspan, as well.
1: Move Your Body Every Day
Longevity and even most traditional doctors agree on this one. Physical activity remains the single strongest lifestyle lever for longevity. To quote Neil Young, “rust never sleeps.”
What we know:
- 150-300 minutes/week of moderate exercise (even just brisk walking) lowers risk of heart disease, stroke, diabetes, cancer and early death. That’s as little as 20 minutes a day.
- “Moving” as little as 5-10 minutes helps offset long periods of sitting, a common human position.
Longevity scientists add the following advice:
- Practice “Zone 2” training, exercise at a pace where you can still talk but not sing (about 60-70% of maximum heart rate).
- Try short, high-intensity bursts (4 repetitions of 30 seconds of hard work) improve cardiovascular fitness, a cornerstone of healthspan.
2: Build and Preserve Muscle as a “Longevity Organ”
Muscle is viewed as a central organ of longevity.
Low muscle mass, poor grip strength both strongly predict frailty, falls, disability and mortality as we age. Muscle is a “glucose sink,” improving sugar control and lowering risk of diabetes. Do not shy away from protein!
Longevity clinics treat resistance training as non-negotiable, especially after age 40.
Why this kind of movement is important:
- Contracting muscles (movement) releases myokines that benefit the brain, immune function and overall metabolism.
- Strength training wins out. Aim for 2-4 sets of 8-15 repetitions using a resistance that feels challenging but safe.
- Emphasize movements that promote healthy aging including squats, deadlifts, push-ups and pull-ups.
3: Eat in a Way That Calms, Not Accelerates Aging and Disease
When it comes to optimal health, “you are what you eat” has never been truer.
Practical nutrition advice
- Eat high percentages of plant-based foods such as vegetables, fruits, beans, whole grains and nuts.
- Limit, but do not eliminate, lean meat. And, of course, some fish are great!
- Limit, better eliminate, processed foods, refined carbs (most all are), processed meats and especially all artificial sweeteners.
- Emphasize unsaturated fats (olive oil, nuts, fish) over saturated fats. Keep in mind that all natural fats have certain health benefits.
- Avoid food additives like MSG, carrageenan, preservatives, dyes, BHT, BHA, TBHQ, sodium nitrite or anything “fat free.”
- Look for organic, grass-fed and pasture-raised options, which are all much healthier.
2026 food is just not what it used to be. Read up on vitamins, minerals and other supplements that fill in the current nutritional voids.
Longevity researchers are studying:
- Protein optimization: Higher protein levels in mid-life and older individuals to preserve muscle function
- Time-restricted eating: All meals within a restricted and consistent window (8-10 hours) helps improve metabolic health, weight loss. and circadian rhythm
- Skipping some meals: 24-48 hour fasts are healthy, eliminate toxic wastes and stress metabolic function in a positive way.
4: Prioritize Sleep
Sleep isn’t just rest. Sleep is active maintenance. Longevity experts are strict on sleep.
- Short (regularly under 6 hours), erratic sleep or excessively extended sleep (over 10 hours) both correlate with higher risk for obesity, heart disease, diabetes, depression and even early death.
- Strive for 7-9 hours a night.
- Short afternoon naps are a great “re-set” mechanism.
- Deep and REM sleep support long-term memory, brain detoxification (boost glymphatic system – brain waste disposal) and immune function.
5: Live Leaner
Obesity is likely the most complex and devastating component of disease and aging. Excess body fat produces massive, chronic inflammation, which is the cornerstone for most chronic diseases.
Here are some traditional and longevity truths.
- Obesity increases the risk of hypertension, diabetes, heart disease, stroke, cancer, kidney disease, joint problems, respiratory conditions and mental health issues. All can lead to mortality.
- There is simply no evidence behind the concept of “healthy fat.”
- Fat can be isolated in organs, not just show up on the scales.
- Non-alcoholic fatty liver disease is a killer and associated with increased consumption of high fructose corn syrup. Alcoholic fatty liver disease is even worse.
6: Consider Alcohol a Recreational Device, Not a Health Supplement
The old belief that “a little alcohol is good for the heart” is being debated.
Current views among researchers are:
- Proposed benefits of light drinking seem unlikely.
- Heavy drinking clearly harms the brain, heart, liver and shortens life.
- Longevity goals do not include any rationale to start drinking.
- If you do drink, keep it intermittent and mindful. Build a social life that does not rely on excess alcohol.
7: Manage Chronic Stress and Support Emotional Resilience
Longevity science increasingly recognizes psychological health as an essential component of longevity and healthspan.
Factors to consider:
- Chronic stress floods the system with cortisol and adrenaline, raising blood pressure, blood sugar and inflammation.
- Chronic excess cortisol accelerates vascular disease, visceral fat and cognitive decline.
- Decrease stress with meditation, deep breathing, yoga, prayer, nature walks, a healthy sex life, fulfilling relationships—whatever works for you.
- Interact in community. People close to friends, family, social groups, faith groups and volunteer groups age better physically and mentally.
- Some longevity experts now promote “psychological fitness” (grit, optimism, happiness and social interaction) as a key pillar of healthspan.
8: Avoid Toxins, Like the Plague
Unfortunately, the list is long and sometimes difficult to avoid.
- Air pollution
- Heavy metals (especially lead and mercury)
- Pesticides
- BPA (plastics)
- Radon
- Mold
- Radiation
- Formaldehyde
- Microplastics
- Most city water supplies
- Unnecessary and overuse of antibiotics, statins and steroids
9: Keep Your Brain Busy
Aging brains with more “cognitive reserve” cope better with age-related factors.
Longevity and dementia experts agree on the following:
- Continual education, mentally engaging work and cognitively active lifestyles are associated with lower risk of dementia
- Bilingualism, complex hobbies, musical instruments, crafts and continuous learning all increase healthspan
- Focus on mentally demanding games requiring strategy, not mindless repetition
10: Align With Your Circadian Rhythm
Circadian health is your 24-hour biologic clock every cell in your body follows. Disruption through irregular sleep, erratic eating, toxins and stress are linked to higher risks of obesity, diabetes, heart disease and cancers.
Support circadian rhythm through:
- Natural light, especially from the sun, is good for you. Don’t live in a cave!
- Keep meals within a consistent daytime window. Late-night feasts are terrible for your health.
- Keep a regular sleep/wake schedule as much as your life allows.
- De-stress, turning to whatever method you prefer.
11: Stay Informed
Longevity science is rapidly exploring drugs and interventions aimed at slowing the biologic aging process. Aging is often considered the master or universal disease. These are promising but not yet completely proven concepts.
- Metformin: a botanical compound that appears to be a natural aptagen
- Rapamycin and rapalogs: mimic mTOR, a key anti-aging pathway
- Senolytics: clear senescent, toxic scavenger cells
- NAD+ boosters (NMN): support normal cellular repair
- Stress challenges: fasting, ice baths, high output exercise – all designed to improve cellular function and repair
Most longevity scientists agree:
- For now, most research or treatments is still in long-term clinical trials.
- Lifestyle changes—movement, nutrition, sleep, avoiding toxins and unnecessary pharmaceuticals, stress management and good relationships—are still the foundation for longevity and healthspan.
12: Focus on Preventative Medicine
Allopathic medicine focuses on pathogenesis, treatment of disease. Longevity science is focused on salutogenesis, the prevention of disease. It may seem tacky, but there is simply no money in a cure. Effective preventative care is everything in the prior eleven points. Robert Lufkin, MD, a renowned chronic disease and longevity expert, says it well: “You can prevent what traditional medicine can only treat. Every day, every meal, you have a choice to live better and live longer.”
Recommended Reading
If you want to learn more about longevity, I recommend these great reads.
- “Lifespan” by David Sinclair, PhD
- “Lies I Taught In Medical School” by Robert Lufkin, MD
- “The Silent Fire” by Shilpa Ravella, MD
Read part 1 on longevity from Dr. DeLoach here.
Read more on nutrition and aging here.
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Joe DeLoach, OD, FAAO, is chief compliance officer for Practice Performance Partners (PPP) and former Clinical Professor at the University of Houston College of Optometry. To contact: joe@practiceperformancepartners.com |
