Is It Working? New Ways to Know If You Are Making a Difference

Last November, I got a comprehensive blood biomarker test — the kind that analyzes over 100 different markers and uses them to calculate your biological age.

The result was some welcome news: my biological age clocked in at 55.7. Sixteen years younger than my actual age.

Yes, I’ll admit, I did a little happy dance.

Then I got tested again in early February. Biological age: 59.5. Still 11.7 years younger than my chronological age, which was good, if I viewed the glass as half full. But on the flip side, I had aged five years, biologically speaking, in ten weeks.

Boohoo.

Okay, there was a perfectly good explanation. I’d spent most of January flat on my back with a bad case of COVID. My body had been in full battle mode — inflammation surging, immune resources depleted, recovery demanding everything my cells had.

And the blood biomarker test, which draws from markers like CRP (inflammation), glucose, albumin, and immune function, had captured all of it in one unsparing number. That’s actually what these tests are supposed to do — reflect your current biological state with honesty.

But the experience raised a bigger question, one that anyone working to impact their aging trajectory is quietly asking:

Am I actually making a difference? And if so, how much?

You do the strength training. You practice yoga. You walk regularly. You may be playing a sport, swim, or jog – or “simply” gardening or playing with your grandkids.

But are you actually building muscle? Are you really making a difference in how well you are aging? Are you staying ahead of the curve?

Not just in a good month, not just when everything goes right — but as a trend, over time, in the actual biology of how you are aging. Is the yoga working? Is the strength training working? Is any of it measurable, or am I just hoping?

The answer — and I mean this with full scientific backing — is yes. Your efforts are making a difference. And we have better tools than ever to see it.

Your Body Is Rebuilding Itself Right Now

Here’s a fact that tends to get lost in all the fear-based messaging around aging: your body is not a fixed object in slow decline. It is, right now, in a constant state of renewal.

Bone tissue completely replaces itself every 10 years. Muscle fibers repair and remodel after every strength challenge you give them. Even the chemical “switches” on your DNA — the epigenetic markers that scientists now use to measure biological age — shift in response to how you move, sleep, breathe, and eat. Your body is listening to everything you do.

This is the heart of the biological age concept. Unlike chronological age, which simply counts the years since your birth, biological age reflects how well your cells and organ systems are actually functioning right now. Two people born the same year can have biological ages more than a decade apart — and the research is clear that lifestyle choices drive that gap.

Like a garden in bloom, how often you water, and often and how well you fertilize, how well your prepare the soil your plants grow in makes all the difference in how well this process unfolds.

That is the lifestyle difference. And the exciting news: We can now measure that difference, and we can watch how it impacts our aging trajectory.

Why “I Feel Better” Isn’t Enough — And What Your Old DEXA Is Missing

My February blood test taught me something important about the limitations of any single measurement. Blood biomarker-based biological age tools are genuinely useful and actionable — each marker ties directly to something you can change.

But because they reflect your current physiological state, they’re sensitive to short-term disruptions: illness, a poor night of sleep before the draw, unusual stress, or an unusually good stretch. That’s not a flaw; it’s a feature. But it means a single data point can mislead, and context matters enormously.

The same caution applies to the bone density DEXA scan most of us receive through our doctors. It tells you your T-score and Z-score — how your bone density compares to a 30-year-old’s, and how it compares to others your age.

What it doesn’t tell you is how much muscle you have, how fast you’re aging at the cellular level, how your inflammatory load has shifted, or how your body is actually functioning in real life. For a long time, that bone-only snapshot was the primary feedback tool available to people managing osteoporosis or osteopenia.

It doesn’t have to be anymore.

The Full Body Composition DEXA: Your Best Starting Point

Here’s something most people don’t know: the same DEXA machine used for bone density scans can — when run as a full-body composition scan — also measure your lean muscle mass in detail.

Total muscle across your whole body. Muscle in each arm and each leg. Muscle in your trunk. All broken out by region, alongside fat distribution and bone density data, in a single 15-minute scan.

This is the full-body composition DEXA, and it’s a completely different report from the bone-only scan most doctors order.

Why does this matter so much? Because muscle mass is the other half of the fracture prevention story — the half that rarely gets talked about. Muscle mass naturally begins to decline around age 30, at a rate of 3–5% per decade.

By the time most people are diagnosed with osteoporosis, they have been quietly losing muscle for decades. And that loss matters enormously: when you lose muscle, you lose the structural support around your bones, your balance becomes less reliable, and your fracture risk climbs — independently of bone density alone. Researchers now know that the combination of bone loss and muscle loss, called osteosarcopenia, creates greater fracture risk than either condition alone.

The full-body DEXA catches both. It answers the question your strength practice is always quietly asking: Is this building muscle? Not just how you feel, but in actual grams of lean tissue, tracked over time.

One Important Takeway:

Losing muscle mass (sarcopenia) and losing muscle strength and power (dynapenia) are not the same.

Research now shows that muscle loss alone explains less than 10% of age-related strength losses. What matters equally — or more — is neuromuscular integration: how effectively your nervous system fires and recruits muscle fibers when you need them.

This is precisely why yoga’s emphasis on balance, coordination, proprioception, and controlled movement is so valuable alongside strength training. The DEXA measures the mass; your practice builds the neural efficiency that determines what you can actually do with it.

How to access it and what it costs:

Ask specifically for a “full-body composition DEXA” or “body composition scan” — not just a bone density scan. Dedicated wellness providers like BodySpec and DexaBody offer these scans starting at $45–$75 per scan, with membership packages bringing the cost as low as $40 per scan. Hospital or radiology-based imaging tends to run $150–$300+.

Note: your doctor-ordered bone density DEXA may be covered by Medicare or insurance for osteoporosis screening — but the full-body composition version that includes the muscle data is typically an out-of-pocket expense, since insurers classify it as wellness rather than medical diagnosis. HSA and FSA funds can generally be used for both.

Recommended retesting: annually for general tracking, every 3–6 months if you’re actively building strength.

Beyond Bones: New Tests That Measure Your Cellular Age

If the full-body DEXA answers “how is my body composition changing,” a new generation of biological age tests answers the deeper question: “how is my biology aging at the cellular level?”

Epigenetic Clocks: Reading the Molecular Switches on Your DNA

Every cell in your body contains the same DNA. But tiny chemical tags called methyl groups attach to your DNA at specific sites and influence how your genes are expressed. These patterns shift predictably with age — and with stress, inflammation, lifestyle, and movement.

Scientists can now analyze hundreds of thousands of these sites and calculate your biological age based on the patterns. This is called an epigenetic clock, and it’s currently considered the most scientifically validated measure of biological aging available. Crucially, unlike blood biomarkers (which can swing dramatically with acute illness — as my February results showed), epigenetic clock readings are more stable and reflect longer-term biological trends rather than last week’s health status.

A breakthrough tool called DunedinPACE takes this one step further. Rather than giving you a single biological age number, it measures the speed at which you’re currently aging — like a speedometer for your biology. A score of 1.0 means aging at the average pace. A score of 0.85 means aging 15% slower than average. Validated in more than 65 research cohorts across 17 countries, it’s sensitive enough to detect whether lifestyle interventions — including yoga, strength training, and stress management — are working, often within 3–6 months.

Cost: The most comprehensive epigenetic test available to consumers analyzes over 900,000 DNA methylation sites and runs $499 for a single test, or approximately $250 per test on a quarterly retesting subscription.

A more accessible entry point — a cheek-swab based epigenetic test co-founded by Harvard longevity researcher Dr. David Sinclair — starts at $229 for a single test, the lowest single-test entry price among major epigenetic testing providers. These tests are generally HSA/FSA eligible.

Blood Biomarker Analysis: Actionable and Immediate

Despite my February humbling, blood-based biological age tools remain one of the most powerful feedback systems available — precisely because each number connects directly to a specific action.

Elevated fasting glucose responds to dietary changes. High CRP (inflammation) responds to anti-inflammatory practices including yoga, breathwork, and stress reduction. Albumin — a marker of nutritional status — responds to dietary protein and overall health.

The key is context and consistency. One test after a month of COVID tells you something accurate: your body is recovering. Tracked across multiple tests over time, the trend line tells you something far more meaningful: how your biology is responding to everything you’re doing to care for yourself.

Cost: There are numerous blood biomarker platforms with biological age analysis – and costs range from $149 a year for just platform access (you upload your own blood test results that you get via a doctor prescription) and $497 for platform access plus blood.

Some of the more well-known ones include Functionhealth, Inside Tracker, SuperPower, Empirical Health, Hundred, Lifeforce, and more. The list is long and new services are coming out almost every month.

GlycanAge: A Window Into Inflammation and Immune Aging

Chronic, low-grade inflammation is one of the biggest drivers of faster aging — and the encouraging news is that it’s deeply influenced by how you live.

One newer kind of biological age test looks specifically at this, by measuring the tiny sugar “coats” (called glycans) attached to your immune antibodies.

These patterns act like a long-term diary of your inflammation levels over the past few months, rather than a snapshot of how you slept or what you ate yesterday. That makes them a very steady, reliable way to see whether your overall lifestyle is calming inflammation or quietly feeding it.

For postmenopausal women, this is especially important: persistent, low-grade inflammation is strongly linked to both bone loss and loss of muscle mass. The hopeful part is that many of the tools you already have — yoga, breathwork, stress management, and anti-inflammatory nutrition — can shift these glycan-based scores in a better direction within as little as three months.

Cost: Approximately $469–$499 for a single test at GlycanAge, which includes a personalized consultation with a health specialist. Because this test is most meaningful when used to track the effect of an intervention — before and after a dietary change, a new exercise program, or a yoga course — the two-test bundle is typically the most practical and economical choice.

A Free Test You Can Do Today

Okay, none of these are cheap, particularly when you consider that regular monitoring will give you the best idea of how you progress.

But the good news is that there are several easy and meaningful free tests that you can do on your own.

Some of the most powerful biological age markers require no lab, no blood draw, and no cost. They can be done in your living room, your yoga studio, or a park. And for this community, they carry special meaning — because they measure exactly what a safe, purposeful practice is designed to build. And, they can be as easy as simply going for a walk.

Walking Speed. Hands down, the most effective free test you can do on your own is how fast your walk.

Normal pace walking speed gives a surprisingly accurate picture of how your whole body is doing.

Large research studies consistently find that people who walk faster tend to live longer and stay more independent. On the other hand, very slow walkers have a higher chance of health problems and needing help with daily life.

In fact, doctors now say walking speed is like a “sixth vital sign” — as important to watch as things like blood pressure and heart rate.

Why? Walking speed reflects a number of parameters of that all affect your long-term functional health – it reflects your leg strength, balance, breathing, heart health, how coordinated your body is, how strong your core is, how steady and confident you feel when you move, and more..

You can check your own walking speed at home. Mark out about 30–35 feet (10 meters), walk it at your usual pace, and time yourself. Then you can use these simple benchmarks that many studies and clinics use:

• If your walking speed is about 1.0 meter per second or faster (you cover 10 meters in 10 seconds or less), that’s considered a healthy pace for most older adults.
• If your walking speed is slower than about 0.8 m/s (more than 12–13 seconds for 10 meters), doctors start to pay closer attention.
• If it’s slower than about 0.6 m/s (more than 16–17 seconds for 10 meters), research shows a much higher risk of health problems and early death, so this is a strong signal to get support and make changes.

If you enjoy tracking things, you can also play with simple tests like how many times you can stand up from a chair in 30 seconds, or how strong your grip is with a small hand device. But you don’t have to do them all. Even one number — your walking speed — can be enough to see that the work you’re doing is making a real difference.”

The best part is that this number can change. If your yoga, strength work, and walking practice are helping, you’ll often see that you move a little faster and feel a little steadier over time. Even small improvements in walking speed are a clear, easy-to-see sign that your body is aging in a healthier way.

The goal is not perfect numbers. It’s direction. Are your functional tests trending upward? Is your muscle mass holding or growing? Is your inflammatory load decreasing? Is your biological age moving younger — or at least, holding its ground while your chronological age advances?

The Answer Is Yes

My November result — 16 years younger biologically than my calendar age — didn’t come from luck. It came from years of consistent movement, strength work, attention to sleep and nutrition, and the kind of stress-reducing, breath-aware practice that regular yoga and meditation make possible. My February dip was an honest reflection of a month that would have taxed anyone’s biology.

But here’s what I know: the trend line is what matters, not any single point on it.

If you are moving consistently, building strength, working on balance and coordination, managing stress, breathing well, and sleeping intentionally — your biology is responding, whether you can measure it on any given Tuesday morning or not.

What’s changed is that we can now witness that response with tools that go far deeper than a scale or a single T-score. Biological age testing, full-body composition DEXA, functional movement assessments — these aren’t luxuries for elite biohackers. They’re feedback systems that every person serious about healthy aging deserves access to.

Your body is not passively aging. It is actively rebuilding, remodeling, and responding — right now, every day, in direct proportion to what you give it.

The good news is that now we can see the proof.