BODY COMPOSITION

KNOW WHAT YOUR WEIGHT DOESN'T TELL YOU.

The number on the scale is only part of the story.

Two people can have the same height, the same weight and the same BMI—and have very different health profiles.

One may have more skeletal muscle, less visceral fat and stronger bones.

The other may have less muscle, more visceral fat and lower bone density.

The scale cannot tell the difference.

Neither can BMI.

A longevity-focused approach to body composition looks beyond body weight to understand what your body is actually made of—and how that composition is changing over time.

DON'T JUST MEASURE WEIGHT. MEASURE WHAT MATTERS.

Weight alone can hide important differences in health.

Body Mass Index uses height and weight to estimate whether someone's weight falls within a population-based range.

It can be useful for identifying broad trends, but it cannot distinguish between:

Muscle and fat

Visceral and subcutaneous fat

Strong and weak bones

Where fat is stored

Where lean mass is distributed

For longevity, those differences matter.

The question isn't simply:

“What do I weigh?”

It is:

“What is that weight made of?”

MUSCLE. VISCERAL FAT. BONE.

These are three of the most important components of body composition to understand as we age.

MUSCLE

Preserve your physical reserve.

Skeletal muscle is much more than something that makes us stronger.

It plays an important role in glucose metabolism, insulin sensitivity, physical function, mobility and our ability to remain independent as we age.

Muscle mass naturally tends to decline with age.

The objective of longevity isn't simply to prevent weight gain.

It is to preserve—and when appropriate, build—muscle.

VISCERAL FAT

WHERE FAT IS STORED MATTERS.

Not all body fat carries the same metabolic implications.

Subcutaneous fat is stored beneath the skin.

Visceral adipose tissue (VAT) accumulates deeper within the abdomen around internal organs.

Higher amounts of visceral fat are associated with metabolic dysfunction and increased cardiometabolic risk.

This is why two people with the same weight—or even the same body-fat percentage—can have very different metabolic profiles.

The amount of fat matters. Where it is stored matters too.

BONE

BUILD IT. PRESERVE IT.

Bone is living tissue.

Bone mineral density generally reaches its peak earlier in adulthood and can decline as we age, with particularly important changes occurring in women after menopause.

Loss of bone density increases the risk of osteoporosis and fracture.

And fractures later in life can have consequences far beyond the bone itself—affecting mobility, independence and overall health.

A longevity strategy should therefore consider not only muscle and fat, but also:

Are we preserving the skeleton that supports us?

DEXA

LOOK INSIDE YOUR BODY COMPOSITION.

A DEXA scan provides information that a bathroom scale and BMI cannot.

Depending on the scan and reporting system, DEXA can provide measurements of:

Lean Mass

Total Body Fat

Regional Body Fat

Visceral Adipose Tissue

Bone Mineral Density

Together, these measurements provide a much more useful picture of body composition than body weight alone.

WEIGHT TELLS YOU HOW HEAVY YOU ARE.

DEXA HELPS TELL YOU WHAT THAT WEIGHT IS MADE OF.

BODY COMPOSITION & THE FOUR HORSEMEN

Body composition intersects with each of the major threats to long-term health evaluated within LYVYNG.

CARDIOVASCULAR DISEASE

Excess visceral fat and metabolic dysfunction can contribute to cardiovascular risk.

Understanding body composition adds information that body weight alone may miss.

METABOLIC DYSFUNCTION

This is one of the strongest connections.

Visceral fat, skeletal muscle and insulin sensitivity are closely related.

Muscle provides an important site for glucose disposal, while excess visceral fat can be associated with insulin resistance and other metabolic abnormalities.

CANCER

Body composition and metabolic health can influence the risk and outcomes of several cancers.

Maintaining a healthy body composition is one component of a broader cancer-prevention strategy.

NEURODEGENERATIVE DISEASE

The relationship is more indirect, but maintaining physical activity, metabolic health, muscle and functional capacity supports many of the same factors associated with long-term brain health.

BODY COMPOSITION ISN'T A SEPARATE LONGEVITY ISSUE.

IT CONNECTS TO THE ENTIRE HEALTH PROFILE.

How much muscle you have and what that muscle can do are different questions.

DEXA can help measure lean mass.

But having muscle doesn't necessarily tell us how much strength or physical capacity a person has.

That's why we pair body-composition information with measurements of physical performance.

One simple example is grip strength, an objective measure that can provide useful information about overall strength and physical function.

DEXA helps tell us how much lean mass you have.

Grip strength helps tell us what that muscle can do.

Grip strength, VO₂ max and other measurements of physical capacity belong to a broader evaluation of Fitness & Physical Capacity.

[ EXPLORE FITNESS & PHYSICAL CAPACITY → ]

WEIGHT LOSS IS NOT ALWAYS THE SAME AS HEALTH IMPROVEMENT.

What you lose matters.

If someone loses 20 pounds, the scale tells us that body weight decreased.

It doesn't tell us what was lost.

Was it primarily fat?

Was visceral fat reduced?

Was lean muscle preserved?

Was muscle lost along with the weight?

This distinction becomes increasingly important when evaluating nutrition, exercise and weight-loss strategies.

The goal isn't simply weight loss.

The goal is improving body composition while preserving the tissue you want to keep.

THE TRAJECTORY MATTERS MORE.

A single DEXA establishes a baseline.

Repeating meaningful measurements over time allows us to ask better questions:

Is visceral fat decreasing?

Is lean muscle being preserved or increased?

Is bone density stable?

Is body composition improving even if body weight hasn't changed dramatically?

This transforms DEXA from a one-time test into a tool for understanding your trajectory.

MEASURE → ACT → TRACK → REASSESS

PUT THE MEASUREMENT INTO CONTEXT.

Body composition is one part of the larger health picture.

LYVYNG is designed to bring measurements such as DEXA together with:

Cardiovascular Risk

Metabolic Health

Cancer Risk & Screening

Brain Health

VO₂ Max & Aerobic Fitness

Strength & Physical Capacity

Biomarkers

Biological Aging

Lifestyle

Rather than viewing each result in isolation, the objective is to understand how these measurements interact—and whether your actions are changing your trajectory.

[ EXPLORE LYVYNG → ]

TRACK WHAT YOUR BODY IS MADE OF.

Preserve muscle.

Reduce excess visceral fat.

Protect your bones.

And follow how your body composition changes over time.

DON'T JUST MEASURE WEIGHT. MEASURE WHAT MATTERS.

[ FIND A DEXA SCAN → ]