Why use a framework instead of treating symptoms?

Fishtown Medicine uses a framework instead of treating symptoms because chronic symptoms (fatigue, brain fog, weight gain) almost always come from more than one system. A framework prevents chasing one issue while missing the upstream cause.

How is the GER·O·SPAN framework different from a regular physical?

A regular physical is one snapshot of basic labs and vitals. GER·O·SPAN is a longitudinal plan that pairs advanced labs with wearable data, genetics where useful, environment design, and an honest read on the relationships shaping your day. The goal is to find risk early and improve trends over months and years, not to clear a single visit.

How long does the GER·O·SPAN framework take to show results?

Most patients see meaningful changes in 8 to 12 weeks: better sleep scores, lower fasting insulin, improved energy. Bigger structural changes (weight, ApoB, VO2 Max) usually take 3 to 12 months of consistent work. Fishtown Medicine tracks all of it through repeat labs and wearable trends.

Is a wearable required to benefit from the GER·O·SPAN framework?

A wearable is not required, although many patients find that a basic ring or watch (like Oura, Whoop, or Apple Watch) makes the sleep and environment work much easier. Even simple tracking (sleep time, steps, weight) is enough to start.

Is genetic testing required to benefit from the GER·O·SPAN framework?

No. Genetic testing is an option, not a requirement. Fishtown Medicine uses it when the result will change the plan, like guiding statin choice when Lp(a) is elevated, picking an antidepressant by pharmacogenomic data, or screening for inherited cancer risk in the right family history. Patients cautious about genetic data are accommodated without it. See the Genetics page for the full picture.

Are supplements required in the GER·O·SPAN framework?

Supplements are only added when lab work shows a clear gap. Fishtown Medicine does not prescribe a generic supplement stack. Common gaps include vitamin D, omega-3, magnesium, and B12, but recommendations are personalized to each patient's numbers.

Is the GER·O·SPAN framework only for healthy people?

The GER·O·SPAN framework is for anyone who wants better long-term outcomes, including people with existing chronic illness. Fishtown Medicine uses it for patients with hypertension, diabetes, autoimmune disease, and complex symptoms, not just elite optimizers.

How does Fishtown Medicine use the GER·O·SPAN framework day to day?

Fishtown Medicine uses the framework as the structure for every visit and follow-up. Each visit reviews where each side of the seesaw is strong and where its breaking down, then adjusts one or two levers at a time so changes stick.

What are the most important biomarkers in the GER·O·SPAN framework?

The most important biomarkers in the framework usually include ApoB (a cholesterol particle count), fasting insulin (a marker of metabolic health), hs-CRP (an inflammation marker), Lp(a) (a one-time genetic cholesterol marker), HbA1c (90-day average blood sugar), and a full thyroid and vitamin D panel. Fishtown Medicine adjusts the panel based on age, sex, family history, and genetics.

How does the GER·O·SPAN framework approach insulin resistance?

The framework approaches insulin resistance by combining nutrition changes (more fiber and protein, fewer fast carbs), strength training, sleep optimization, and, when appropriate, medications like metformin or GLP-1s. Fishtown Medicine tracks fasting insulin and CGM data to confirm progress.

Why is VO2 Max so important for longevity?

VO2 Max is important for longevity because it is one of the strongest predictors of all-cause mortality. People in the top 25% of VO2 Max for their age have dramatically lower rates of heart disease and metabolic disease than people in the bottom 25%.

How does the GER·O·SPAN framework address sleep apnea?

The framework addresses sleep apnea by screening with home tests when there are red flags: snoring, daytime fatigue, large neck size, hypertension, or low overnight oxygen on a wearable. Treating sleep apnea improves blood pressure, hormone levels, and recovery scores.

Does the GER·O·SPAN framework include mental health?

Yes, the framework includes mental health. It shows up in two Modulators at once: Environment (light, air, digital inputs, substances) and Relationships (close ties, work role, self-narrative). Fishtown Medicine coordinates with therapists and psychiatrists when medication or specialized therapy is needed.

How do relationships actually show up in lab work?

Relationships show up in lab work through stress physiology. Chronic relational stress raises cortisol, fasting glucose, and inflammatory markers like hs-CRP. It also fragments sleep, lowers HRV, and raises blood pressure. When the numbers wont move despite a solid plan, Fishtown Medicine asks about the people, the work, and the relationship the patient has with themselves.

What role does muscle mass play in longevity?

Muscle mass plays a major role in longevity because muscle is the largest disposal site for blood sugar and a key buffer against frailty. Higher muscle mass is linked to lower risk of falls, better metabolic health, and longer healthspan.

How does the GER·O·SPAN framework handle medications?

The framework handles medications as one tool among many. Lifestyle changes come first when they are realistic. When medication will speed safe progress (for example, ApoB-lowering therapy or GLP-1s), Fishtown Medicine uses it strategically and pairs it with the other Fundamentals.

Is the GER·O·SPAN framework compatible with insurance-based care?

Yes, the framework is compatible with insurance-based care for patients who want to integrate it with an outside primary care doctor. The Fishtown Medicine care model is structured for Direct Primary Care (DPC), but the framework concepts apply to anyone working on long-term health.

How does the GER·O·SPAN framework evolve over time?

The framework evolves as new evidence and tools emerge. Fishtown Medicine updates biomarkers, training advice, genetic interpretation, environment design, and the read on relational health as the science changes. The six domains stay constant; the specific tactics inside each one keep improving.

What if I am already doing many of these things?

If you are already doing many of these things, the framework helps you measure and refine. Driven people often miss small but high-impact gaps, like elevated ApoB despite a clean diet, or chronic short sleep that limits recovery. Data turns "doing things" into measurable progress.

GER·O·SPAN: Our Clinical Framework for Healthspan

Q: What is the GER·O·SPAN framework?

GER·O·SPAN is the clinical model Fishtown Medicine uses to organize care. GER stands for the three Modulators that shape you: Genetics, Environment, Relationships. SPAN stands for the three Fundamentals you control: Sleep, Physical Activity, Nutrition. The O in the middle is Our work as your physician, the fulcrum that turns your data into a coherent picture and the right next action.

TL;DR30-second take

GER·O·SPAN is our clinical framework for healthspan. GER stands for the three Modulators that shape you: Genetics, Environment, Relationships. SPAN stands for the three Fundamentals you control: Sleep, Physical Activity, Nutrition. The O in the middle is Our work as your physician, the fulcrum that turns your data into a coherent picture and the picture into the right next action.

Healthspan is not decided by one variable. Its decided by a balance.

GER·O·SPAN is the framework we use to keep that balance. The acronym nests three pieces in one word, with the O standing alone in the middle as the fulcrum:

GER for the things that shape you. Genetics, Environment, Relationships.
·O· for the fulcrum. Our work as your physician, sitting between the two sides.
SPAN for the levers you control. Sleep, Physical Activity, Nutrition.

Picture a seesaw. On one side sit the three Modulators that shape how every Fundamental actually shows up in your body. On the other side sit the three Fundamentals you control day to day. In the middle, the fulcrum is our job as your physician. We translate your data into a coherent picture, and the picture into the right next action.

This page walks through all seven elements (Modulators first, then the fulcrum, then Fundamentals) and answers the questions patients ask us most often.

The Three Modulators: What Shapes You

You did not choose these the way you choose what to eat for lunch. They are the conditions you live inside. Ignoring them is why two people on the "same plan" land in completely different places. We lead with the Modulators because they set the ceiling for what the Fundamentals can do.

1. Genetics (Inherit)

Your blueprint is not your destiny, but its your starting point. Your DNA shapes how you metabolize food, drugs, and stress, and how susceptible you are to specific risks. Within this Modulator we look at:

Pharmacogenomics: How your body processes specific medications, so we prescribe what actually works for you.
Risk Markers: Targeted tests like Lp(a), APOE, and pharmacogenomics when the result will change the plan.
Family History: A free, powerful data source most clinics never sit with long enough.

We dont push genetic testing on anyone. When the result will change what we do, we offer it. When it wont, we skip it. The full clinical picture is on the Genetics page.

2. Environment (Design)

Willpower is finite. Design is permanent. Environment is the physical world that shapes your biology, hour by hour, whether you notice it or not. We shape it deliberately:

Home and Work: Light exposure, air quality, food at arm's reach, the friction (or ease) of healthy choices.
Place and Geography: Philadelphia air quality, walkability, the room temperature you sleep in, water you drink.
Chemical Exposure: Microplastics, endocrine disruptors, occupational exposures, household products.
Digital Environment: The inputs driving anxiety, attention fragmentation, and sleep disruption.

The full clinical picture, including what we actually screen for in Philadelphia and the design moves that pay back the fastest, is on the Environment page.

3. Relationships (Connect)

The people in your life are pulling on your biology, all day, every day. Loneliness is associated with mortality at rates comparable to smoking. The quality of your close relationships, your work relationships, and the relationship you have with yourself shows up in cortisol, blood pressure, sleep architecture, and the durability of every other change you make. Within this Modulator we look at:

Close Ties: Partner, family, friendships. The connections that buffer stress and the conflicts that drive HPA-axis activation.
Work and Role: The middle-management squeeze, autonomy loss, and chronic vigilance that show up as elevated cortisol and blood pressure.
Community: The presence of people who actually know you, and the loneliness that costs years.
Relationship with Self: Self-compassion and the inner narrative that determines whether you act on a plan or abandon it after a hard week.

We name Relationships separately because its too important to fold inside "stress" or "lifestyle." For many of our patients in their 30s, 40s, and 50s, this is the Modulator doing the most damage and the one with the most leverage.

The Fulcrum: Our Work in the Middle (the O)

The seesaw doesnt balance itself. Between the Modulators that shape you and the Fundamentals you control sits Our work as your physician, the O in GER·O·SPAN. We treat it with the same rigor as a Fundamental:

Data: Advanced biomarkers, wearable trends, imaging, and continuous monitoring interpreted longitudinally, not as one-off snapshots. We work with fasting insulin, ApoB, hs-CRP (high-sensitivity C-reactive protein, an inflammation marker), Lp(a), HbA1c, full thyroid panels, micronutrients, and more.
Coherent Understanding: Pulling every signal into a single picture of your biology. Reviewing your old records ourselves, with a preventive lens, to find the patterns earlier specialists were not asked to look for.
Right Action: One or two adjustments at a time, paced to actually stick. The data shows us where the lever is. The fulcrum is how we move it.

This is what we mean when we say we are your medical quarterback. The Modulators and Fundamentals are the playing field. The fulcrum is the play-calling.

The Three Fundamentals: What You Control

These are the levers you move every day. Most plans stop here. Ours starts here, but only after the Modulators and the fulcrum are accounted for. We lead with Sleep inside this group because fixing sleep multiplies the value of every other change.

4. Sleep (Restore)

Adaptation happens during rest, not during stress. Sleep is where the body repairs and the brain consolidates. We pay attention to:

Sleep Architecture: Not just hours in bed, but the quality of your deep and REM (Rapid Eye Movement) cycles.
Nervous System Regulation: Using tools like HRV (Heart Rate Variability) tracking to manage the modern "fight or flight" baseline. HRV is the small variation between heartbeats; higher numbers usually mean better recovery.
Hormetic Stress: Short, deliberate doses of heat (sauna) and cold (plunge) to trigger cellular repair. Hormesis is a small stress that triggers a strengthening response.

5. Physical Activity (Train)

The body is the vehicle for the life. Strength and cardiorespiratory fitness are among the strongest predictors of how long, and how well, you live. We focus on:

VO2 Max: Raising the horsepower of your cardiovascular system. VO2 Max is the maximum amount of oxygen your body can use during hard exercise.
Zone 2 Training: Building the mitochondrial base under everything else. Zone 2 is steady, conversational-effort cardio. Mitochondria are the energy factories inside your cells.
Strength and Stability: Muscle as the buffer against frailty, falls, and metabolic decline over the next 40 years.

6. Nutrition (Fuel)

What you put in determines what you get out. Nutrition is not "dieting." It is the raw material your biology runs on. Within this Fundamental we work on:

Precision Nutrition: Matching protein, fat, and carbohydrate to your metabolic health and activity level.
Supplement Logic: Targeted molecules that fill gaps your bloodwork identifies, not a generic stack.
Strategic Medications: When food and behavior are not enough, we use pharmacology (like ApoB lowering agents or GLP-1s) as a precision tool, not a crutch.

Scientific References

Kodama S, et al. "Cardiorespiratory Fitness as a Quantitative Predictor of All-Cause Mortality and Cardiovascular Events in Healthy Men and Women." JAMA. 2009.
Kraus VB, et al. "Effects of Aerobic and Resistance Training on Hemoglobin A1c Levels in Patients With Type 2 Diabetes: A Randomized Controlled Trial." JAMA. 2010.
Walker MP. "Why We Sleep." Scribner. 2017.
Attia P. "Outlive: The Science and Art of Longevity." Harmony Books. 2023.
Khera AV, et al. "Genetic Risk, Adherence to a Healthy Lifestyle, and Coronary Disease." NEJM. 2016.
Holt-Lunstad J, et al. "Social Relationships and Mortality Risk: A Meta-Analytic Review." PLoS Medicine. 2010.
Holt-Lunstad J, et al. "Loneliness and Social Isolation as Risk Factors for Mortality: A Meta-Analytic Review." Perspectives on Psychological Science. 2015.

Fishtown Medicine | About

2418 E York St, Philadelphia, PA 19125(267) 360-7927 hello@fishtownmedicine.comHSA/FSA Eligible

Schedule Your Consult

Frequently Asked Questions

Common Questions

Genetics, Environment, and Relationships are Modulators because they are not levers you pull each morning. They are the conditions you act inside of. They shape how sleep, physical activity, and nutrition actually affect you. Two people with identical habits can land in different places because their genetics, their environments, or the people around them are pulling the seesaw in different directions. Naming them separately accounts for that, instead of pretending willpower and behavior alone explain results.

Relationships is a separate Modulator because the people in your life, the work you do, and the relationship you have with yourself shape your biology at the same level genetics and environment do. Loneliness predicts mortality at rates comparable to smoking. Chronic role stress raises blood pressure and disrupts sleep. A supportive partner makes hard changes stick; a hostile work environment unravels them. Naming Relationships explicitly keeps these forces from getting buried inside "lifestyle" or "stress."

Deep-Dive Questions

Environment design affects biology because the body responds to light, temperature, sound, and air quality continuously. Bright morning light supports circadian rhythm, good indoor air quality lowers respiratory inflammation, and consistent meal timing supports metabolic stability. The Environment page walks through what Fishtown Medicine actually screens for and the design moves that pay back the fastest.

Genetic data changes the plan when it points to a specific action. Pharmacogenomic data can guide which antidepressant or statin to try first. Elevated Lp(a) raises the threshold for intensive ApoB lowering. APOE status shapes how Fishtown Medicine approaches brain health and lipids. Genetic data is used when it changes management and ignored when it does not. The Genetics page walks through exactly what gets ordered and why.

Fishtown Medicine prioritizes by starting with the lever that enables the others. Inside the Fundamentals, that is usually sleep, then physical activity, then nutrition (which is why SPAN is ordered that way). When a Modulator is dominating the picture (a strong family history, a hostile work environment, a fraying relationship), the Modulator gets accounted for earlier rather than later. The fulcrum work, our judgment as your physician, is what decides where to start.

Ready when you are

Start your intake

Dr. Ash reads every intake himself, and answers questions personally - usually within a few hours.

TL;DR30-second take

Healthspan is not decided by one variable. Its decided by a balance.

GER·O·SPAN is the framework we use to keep that balance. The acronym nests three pieces in one word, with the O standing alone in the middle as the fulcrum:

GER for the things that shape you. Genetics, Environment, Relationships.
·O· for the fulcrum. Our work as your physician, sitting between the two sides.
SPAN for the levers you control. Sleep, Physical Activity, Nutrition.

This page walks through all seven elements (Modulators first, then the fulcrum, then Fundamentals) and answers the questions patients ask us most often.