The Big O | April 2026 Newsletter
Power Up Your Cells: Mitochondria and Longevity
At Optispan, we don’t think small; we aim for exponential impact. The Big O notation* represents the growth of complexity in algorithms. At Optispan, we take a similar approach to scaling opportunities for optimal healthspans for everyone. Our mission is to redefine what’s possible in health, creating meaningful change on a global scale.
Clinic Updates
Mitocondria and Aging: What's really happening?
By Nicole Byrne, M.D.
Mitochondria are often called the "powerhouses" of our cells, but they are also central regulators of how we age.
As we get older, mitochondria produce less energy (ATP) while generating more "exhaust" in the form of oxidative stress. Like an aging engine, they become less efficient and create more wear and tear. At the same time, damage builds up in their DNA, which further reduces how well they function.
This creates a vicious cycle. As mitochondria become less efficient, they produce more oxidative stress, which damages cells - and the mitochondria themselves - even more. Over time, this cycle contributes to many of the changes we associate with aging.
In many ways, mitochondria sit at the center of the aging process. When they begin to fail, it doesn't just affect energy, it sets off a chain reaction that touches nearly every system in the body.
This Is Why Mitochondrial Decline Shows Up as Aging
Because mitochondria are involved in so many essential processes, their decline helps drive several of the core features of aging:
· Chronic inflammation. Damaged mitochondria can release signals that trigger ongoing, low-grade inflammation, gradually accelerating tissue damage over time.
· Impaired cellular cleanup. Your body normally clears out and recycles damaged components through a process called autophagy. When mitochondria aren't functioning well, this cleanup system slows down, allowing cellular "debris" to build up.
· Cellular senescence. As damage accumulates, more cells enter a "zombie-like" state (called cellular senescence). These cells are still alive, but no longer function properly—and they release signals that can harm nearby healthy cells.
· Reduced repair capacity. Stem cells rely on mitochondrial energy to repair and regenerate tissues. When that energy supply declines, the body's ability to heal and recover slows down.
· Metabolic dysregulation. Mitochondria help regulate blood sugar, hormone signaling, and key growth and repair pathways. When they underperform, these systems begin to fall out of balance.
Why This Matters
When your mitochondria are functioning well, your cells have the energy and flexibility to repair, adapt, and respond to stress.
When they're not, the opposite happens: recovery slows, inflammation rises, and systems across the body begin to lose efficiency.
How to Support Your Mitochondria
The good news is that mitochondria are highly adaptable and responsive to your environment. That means the way you live day to day can directly influence how well your cells age. Small, consistent habits can make a meaningful difference in how your cells produce and manage energy over time.
Head to our Coach's Corner, where we break down simple, practical ways to support your mitochondria through lifestyle.
Healthspan Coach Corner
How to Support Your Mitochondira Through Lifestyle
By Nick Arapis, ACE-CMES, CSCS
Dr. Byrne laid out why mitochondrial health is central to how well you age. Now let's dive into some of the tactics you can do to improve it.
Mitochondria are responsive to the inputs you give them every day. That is both the problem and the opportunity. The same cellular machinery that breaks down under chronic stress, poor sleep, and metabolic dysfunction can be trained and protected through deliberate lifestyle choices. Here are some tips on how to approach optimizing your mitochondria through our pillars of health.
Eat: Diet is often where people have the greatest opportunity to improve mitochondrial health. A pattern built around whole foods, adequate protein, and healthy fats provides the raw materials needed for efficient energy production and overall cellular function. Nutrients involved in energy metabolism, including magnesium, B vitamins, and CoQ10, are also important, especially when poor intake, impaired absorption, medication use, or higher physiological demands increase the risk of deficiency. In contrast, ultra-processed foods are associated with greater oxidative and inflammatory stress and may impair mitochondrial function over time. Time-restricted eating may also support metabolic health and cellular cleanup pathways, including the removal of damaged mitochondria.
Move: Exercise is one of the strongest lifestyle signals for mitochondrial adaptation. Moderate-intensity cardio is a practical foundation. This is steady-state aerobic work at a conversational pace, roughly 60 to 70 percent of max heart rate, three to four sessions per week at 30 to 45 minutes each. It drives meaningful adaptation in mitochondrial density and metabolic flexibility. Adding some higher-intensity interval work can broaden that benefit further. Resistance training matters here too. Muscle tissue is mitochondria-dense, and it helps preserve muscle mass and metabolic health while appearing compatible with mitochondrial remodeling.
Sleep: Sleep deprivation drives up oxidative stress, impairs mitophagy, and accelerates mitochondrial DNA damage. Even one or two nights of poor sleep can alter molecular pathways involved in metabolic signaling, oxidative balance, and inflammation, and this is not fully reversed by weekend catch-up sleep. Seven to nine hours of consistent, quality sleep is a non-negotiable input. The basics hold: cool dark room, consistent sleep and wake times, no stimulants after early afternoon.
Connect: Chronic stress is one of the more underappreciated drivers of mitochondrial dysfunction. Elevated cortisol increases oxidative burden and suppresses the cellular cleanup processes your mitochondria depend on. The distinction worth making here is between acute stress and chronic stress. Acute, controlled stress like exercise is beneficial and promotes cellular resilience. What damages mitochondria is unremitting, unresolved stress with no recovery built in. Consistent practices, whether breathwork, meditation, time in nature, or quality social connection, can improve stress regulation and recovery, which likely supports mitochondrial function indirectly.
Every pillar of the Optispan framework maps directly onto mitochondrial health, and that is not a coincidence. These are the same foundational levers that drive how well your cells produce energy, manage inflammation, and repair themselves over time. Pick one area where you are consistently underperforming and close that gap first. Mitochondrial health is not about doing everything at once. It is about consistent inputs over time.