Why I'm Building a Longevity Lab

By: Siobhan Gray, MD

Over the past year, the back room at PEAKMD has served many purposes. It has been a recovery space where members could use the brain tap, red light therapy, compression boots, and other tools designed to support recovery and resilience. Those tools are valuable, and they are not going anywhere.

But as I watched people use the space, I realized I wanted it to do more.

One of the things that drew me away from traditional medicine and toward longevity medicine was the recognition that health is not simply the absence of disease. Most of us do not wake up one day suddenly frail, weak, or unable to do the things we love. Those changes occur gradually, often over decades, as we lose strength, balance, cardiovascular fitness, mobility, power, and resilience.

The challenge is that our healthcare system does a much better job measuring disease than measuring capacity.

We routinely check cholesterol, blood pressure, glucose, kidney function, and liver enzymes. Those numbers matter. They help us identify risk and detect disease. What they do not tell us is whether we can get off the floor without assistance, catch ourselves when we trip, recover quickly after exertion, or continue doing the activities that give our lives meaning.

When I think about longevity, I do not think primarily about lifespan. I think about healthspan. I think about preserving the physical and mental capacity to participate fully in life for as long as possible.

That idea became the foundation for the PEAKMD Longevity Lab.

The Longevity Lab is part assessment center, part mobility studio, and part recovery space. It is designed to help people understand where they are today, identify opportunities for improvement, and build the capacities that support long-term independence and vitality. The recovery tools remain an important part of the space, but they are now complemented by assessments and movement practices that help answer a different question:

How well are you actually aging?

That question is more difficult to answer than most people realize. Fortunately, research over the past two decades has given us important clues. While no single test can predict the future, several physical capacities consistently emerge as powerful indicators of healthspan, independence, and mortality risk. These capacities form the foundation of the PEAKMD Longevity Lab.

From Disease Prevention to Capacity Building

Much of modern medicine is focused on preventing disease, and for good reason. We want to reduce the risk of heart attacks, strokes, cancer, diabetes, fractures, and dementia. The challenge is that most people do not experience those outcomes as diagnoses. They experience them as losses of function.

Long before someone develops frailty, they often notice that they no longer trust their balance.

Long before they become dependent on others, they begin avoiding activities that once felt effortless. They stop getting down on the floor with grandchildren because getting back up has become difficult. They stop hiking steeper trails because their endurance is fading. They begin planning life around limitations rather than possibilities.

These changes are often dismissed as a normal part of aging. In reality, many represent declining capacity that can be measured, trained, and often improved.

One of the most important shifts in longevity medicine is moving beyond the question, "How do we prevent disease?" and asking, "How do we preserve function?"

The answer is not found in a single lab test or imaging study. It is found in the physical capacities that allow us to navigate the world with confidence. These capacities influence whether we remain independent, resilient, and capable as we age.

The Longevity Lab focuses on five of those capacities: stability, strength, power, cardiovascular recovery, and autonomic resilience. Together, they provide a more complete picture of healthspan than weight, BMI, or even many traditional biomarkers.

Stability & Neurological Integrity

The first question on the Longevity Lab scorecard is deceptively simple: Can you stand on one leg?

Most people assume balance is primarily a function of strength. In reality, balance represents an ongoing conversation between the brain, inner ear, eyes, joints, muscles, and nervous system. Every second you remain upright, thousands of small adjustments occur beneath conscious awareness.

Because balance relies on so many systems simultaneously, it serves as an excellent window into overall neurological function.

Research has shown that poor single-leg balance is associated with increased mortality risk, even after adjusting for age and other health factors. While balance itself is not causing mortality, it appears to reflect the integrity of multiple physiological systems that support healthy aging.

Balance also matters for a much more practical reason. Falls remain one of the leading causes of injury, hospitalization, and loss of independence among older adults. Yet the goal is not simply preventing falls. The goal is maintaining the confidence and physical capacity to move through the world without fear.

In the Longevity Lab, we assess balance both with eyes open and eyes closed. Removing vision forces the body to rely more heavily on proprioception and vestibular input, revealing weaknesses that may otherwise remain hidden. These tests require no special equipment, but they provide valuable information about neurological health and future resilience.

Strength

If I could choose only one physical quality to preserve with age, strength would be near the top of the list.

Strength influences nearly every aspect of daily life. It allows us to rise from a chair, carry groceries, climb stairs, lift luggage into an overhead bin, and remain independent during illness or injury. Strength is also one of the body's most important reserves. When health challenges arise, stronger individuals tend to recover faster and maintain function longer.

One of the most powerful measurements we include in the Longevity Lab is grip strength. It sounds almost too simple to matter, yet grip strength has emerged as one of the strongest predictors of future health outcomes. In the large international PURE study, grip strength predicted all-cause mortality and cardiovascular mortality more strongly than systolic blood pressure.

We also assess sit-to-stand performance, a practical measure of lower body strength and functional independence. The ability to repeatedly stand from a chair without using your hands reflects the strength needed for many everyday activities and often reveals early declines before people notice them in daily life.

Strength training remains one of the most effective interventions we have for healthy aging. It improves muscle mass, bone density, metabolic health, insulin sensitivity, and physical function. The encouraging news is that meaningful improvements can occur at any age.

Power

Power is often overlooked because it sounds like something reserved for athletes. In reality, it may be one of the most important capacities for aging well.

Power is simply the ability to produce force quickly. While strength tends to decline gradually with age, power declines earlier and more rapidly. This matters because many of the movements that protect us in everyday life require speed, not just force.

When you trip on a curb, your ability to catch yourself depends on power. When you need to step quickly to avoid a fall, your ability to react depends on power. When you rise from a chair or climb stairs, power contributes more than many people realize.

The standing broad jump and kneeling-to-feet transition included in the Longevity Lab provide a window into lower body power, coordination, and movement confidence. These tests often surprise people. Individuals who appear strong may discover that power has become a limiting factor.

Fortunately, power is trainable. Appropriately scaled jumping, stepping, carrying, and explosive movements can improve power across the lifespan. Preserving this capacity may be one of the most effective ways to maintain independence and reduce fall risk as we age.

Cardiovascular Capacity & Recovery

When researchers look for the strongest predictors of longevity, cardiorespiratory fitness consistently rises to the top.

Cardiovascular capacity reflects the body's ability to deliver oxygen to working muscles and organs. It influences endurance, energy levels, cognitive function, metabolic health, and overall resilience. Individuals with higher levels of cardiorespiratory fitness experience substantially lower rates of cardiovascular disease and all-cause mortality.

At PEAKMD, I often tell patients that fitness is one of the closest things we have to a longevity drug.

The Longevity Lab includes a simple heart rate recovery assessment. After a brief period of exertion, we measure how quickly the heart rate declines. This recovery reflects the ability of the autonomic nervous system to shift from stress back into recovery mode.

A slower heart rate recovery has been associated with increased mortality risk in multiple studies. In many ways, recovery tells us as much about physiological resilience as performance itself.

The goal is not becoming an elite endurance athlete. The goal is maintaining the cardiovascular reserve that allows us to participate fully in life. ***for more complete assessment in this domain, we also offer Vo2 max testing ***

Recovery & Autonomic Health

Many people think recovery happens when they sleep, sit still, or take a day off from exercise. While those things matter, recovery is really a function of adaptability.

Our nervous systems are constantly responding to physical stress, emotional stress, illness, exercise, travel, poor sleep, and the countless demands of daily life. A healthy nervous system can respond to challenges and then return to baseline. An unhealthy nervous system often remains stuck in a state of chronic activation.

Heart rate variability, or HRV, provides one window into this process.

HRV measures the variation between heartbeats and reflects the dynamic balance between the sympathetic and parasympathetic nervous systems. While there is no perfect HRV number, trends over time can offer insight into recovery, stress load, and resilience.

In the Longevity Lab, HRV is less about achieving a specific score and more about understanding patterns. Are you adapting well to training? Are you recovering adequately? Is your nervous system becoming more flexible over time?

The answers to those questions often reveal opportunities that traditional laboratory testing misses.

Why Mobility Matters

One addition to the Longevity Lab that I am particularly excited about is dedicated mobility space.

Many adults lose movement options long before they lose fitness. They stop squatting, sitting on the floor, reaching overhead, rotating through the spine, hanging, crawling, or moving through a full range of motion. Over time, those missing movements create limitations that affect everything from athletic performance to daily function.

Mobility is not about becoming more flexible for its own sake. Mobility is about maintaining access to movement.

A healthy body should be capable of getting down to the floor and back up again. It should be able to rotate, reach, bend, carry, and move confidently through the environments we encounter in everyday life.

The mobility area of the Longevity Lab is designed to help people reclaim those capacities through intentional movement practice.

The Missing Domains: Purpose and Connection

Although the Longevity Lab focuses heavily on physical capacity, I do not believe health can be fully understood through physical metrics alone.

The North Framework that guides my practice includes four domains: purpose and alignment, body and vitality, mind and presence, and connection and belonging.

The science increasingly supports what many of us already know intuitively. People with a strong sense of purpose tend to live longer and experience lower rates of chronic disease. Social connection predicts health outcomes as strongly as many traditional risk factors. Loneliness, on the other hand, has been associated with increased mortality, cardiovascular disease, depression, and cognitive decline.

The challenge is that purpose and connection are difficult to measure with a stopwatch or dynamometer.

That does not make them less important.

In many ways, they answer the most important question of all: What are you maintaining your health for?

What Are You Training For?

This may be my favorite question in all of longevity medicine.

Most people begin their health journey focused on outcomes. They want to lose weight, lower cholesterol, improve glucose, or gain muscle. Those goals are worthwhile, but they are rarely the deepest motivation.

Underneath those goals is usually something more meaningful.

• Someone wants the energy to travel.

• Someone wants to continue skiing with friends.

• Someone wants to hike with grandchildren.

• Someone wants to remain independent.

• Someone wants to keep saying yes to adventure.

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The Longevity Lab is ultimately not about scores, rankings, or perfect performance. It is about creating awareness and helping people identify the capacities that deserve attention today so they can continue living fully tomorrow.

The sauna, cold plunge, red light therapy, compression boots, mobility space, and assessments all serve the same purpose.

They are tools.

The goal is not optimizing biomarkers for the sake of optimization.

The goal is building a body and mind capable of supporting the life you want to live.

That is what the PEAKMD Longevity Lab is really about.

References

1. Araujo CGS, et al. Successful 10-second one-leg stance performance predicts survival in middle-aged and older individuals. Br J Sports Med. 2022.

2. Leong DP, et al. Prognostic value of grip strength: findings from the PURE study. Lancet. 2015.

3. Studenski S, et al. Gait speed and survival in older adults. JAMA. 2011.

4. Ross R, et al. Importance of assessing cardiorespiratory fitness in clinical practice. Circulation. 2016.

5. Cole CR, et al. Heart-rate recovery immediately after exercise as a predictor of mortality. NEJM. 1999.

6. Garber CE, et al. American College of Sports Medicine Position Stand: Exercise for healthy adults. Med Sci Sports Exerc. 2011.

7. McPhee JS, et al. Physical activity in older age: perspectives for healthy ageing. Ageing Research Reviews. 2016.

8. Holt-Lunstad J, et al. Social relationships and mortality risk. PLoS Medicine. 2010.

9. Hill PL, Turiano NA. Purpose in life and mortality among older adults. Psychological Science. 2014.