MEASURE WHAT YOUR BODY CAN DO.

Health isn't defined only by what we find in your blood.

Routine medical care measures blood pressure, cholesterol, glucose and dozens of other biomarkers.

But we rarely measure something equally important:

Your physical capacity.

How efficiently can your body use oxygen?

How much aerobic reserve do you have?

How strong are you?

And are you preserving the physical capacity you'll need 10, 20 or 30 years from now?

For longevity, these aren't simply measures of athletic performance.

They are measures of functional reserve.

It is one of the most powerful tools we have for longevity.

Higher levels of cardiorespiratory fitness and muscular strength are consistently associated with better long-term health and lower mortality.

Exercise also affects many of the systems involved in chronic disease:

Cardiovascular Health

Glucose Regulation & Insulin Sensitivity

Skeletal Muscle

Bone

Brain Health

Body Composition

Mobility & Independence

That's why LYVYNG treats Exercise as the #1 foundational longevity tactic.

But before deciding what to improve, it helps to know where you're starting.

MEASURE → TRAIN → TRACK → REASSESS

AEROBIC FITNESS + STRENGTH

A complete picture of physical capacity requires more than one measurement.

AEROBIC CAPACITY

How effectively can your cardiovascular and respiratory systems deliver oxygen—and how effectively can your muscles use it?

One of the best objective measurements is:

VO₂ MAX

STRENGTH

How effectively can your muscles generate force and help you perform the activities required for everyday life?

One simple and useful objective measurement is:

GRIP STRENGTH

Neither tells the entire story.

Together with body composition and other measures of physical function, they help us understand something routine blood testing cannot:

What can your body actually do?

VO₂ MAX

MEASURE YOUR AEROBIC CAPACITY.

VO₂ max represents the maximum rate at which your body can take in, transport and utilize oxygen during intense exercise.

It reflects the combined performance of your:

Heart

Lungs

Circulation

Skeletal Muscle

It is generally expressed as milliliters of oxygen used per kilogram of body weight per minute:

mL/kg/min

The higher your cardiorespiratory fitness, the greater your aerobic capacity and reserve.

FITNESS IS STRONGLY ASSOCIATED WITH SURVIVAL.

Large observational studies have consistently found a strong relationship between cardiorespiratory fitness and long-term mortality.

The relationship is particularly important because fitness isn't fixed.

VO₂ max can be trained.

And that makes it different from many risk factors we cannot change.

Aerobic capacity generally declines with age. Building and maintaining greater aerobic reserve earlier in life may help preserve physical function later.

Think of it as creating a larger physiological reserve:

Build capacity now so you have more capacity to preserve later.

THEY MEASURE AND TRAIN DIFFERENT ASPECTS OF AEROBIC FITNESS.

This distinction is important.

VO₂ MAX

Represents your maximum aerobic capacity—your upper limit for oxygen utilization during intense exercise.

ZONE 2

Represents sustained moderate-intensity aerobic work that helps develop aerobic endurance, metabolic efficiency and mitochondrial function.

You need both.

Within LYVYNG Exercise, we separate them into:

Aerobic Endurance / Efficiency → Zone 2

Aerobic Capacity / Output → VO₂ Max

The test tells us where you are.

The exercise strategy helps determine how to improve it.

[ EXPLORE LYVYNG EXERCISE → ]

FROM ESTIMATES TO DIRECT TESTING.

Wearable devices can provide estimates of VO₂ max based on heart rate, pace, power and other information.

These estimates can be useful for following trends.

For a more direct measurement, exercise testing can measure oxygen consumption while workload progressively increases, typically using a treadmill or stationary bicycle with respiratory gas analysis.

The goal is to establish a baseline that can be followed over time.

Whether measured directly or estimated consistently with the same device, the most useful question becomes:

Is my aerobic capacity improving, stable or declining?

MUSCLE MASS ISN'T ENOUGH.

DEXA can tell us how much lean mass you have.

But muscle quantity and muscle function are not the same thing.

As we age, we can lose:

Muscle Mass

Strength

Power

And declines in strength and power can occur faster than the loss of muscle mass itself.

For longevity, the objective isn't simply to look muscular.

It is to preserve the ability to generate force, move safely and remain physically capable.

GRIP STRENGTH

A SIMPLE MEASUREMENT WITH IMPORTANT INFORMATION.

Grip strength is measured using a handheld device called a dynamometer.

The test is simple:

Squeeze the device as strongly as possible.

The result provides an objective measurement of force.

But grip strength reflects more than the muscles of the hand.

Effective grip involves the forearm, upper arm, shoulder and back and is influenced by overall neuromuscular function.

For this reason, grip strength is commonly used as a practical indicator of overall strength and physical function.

It gives us a repeatable number that we can measure—and follow over time.

STRENGTH IS PART OF YOUR PHYSICAL RESERVE.

Research has repeatedly associated lower grip strength with poorer health outcomes, functional decline and increased mortality risk.

That doesn't mean grip strength itself determines how long you will live.

Rather, it can serve as a useful marker of overall strength, robustness and physical capacity.

And unlike many traditional risk factors:

Strength can be trained.

The objective isn't to achieve one universal number.

It is to understand your current level, compare it appropriately for age and sex, and—most importantly—follow the trajectory.

QUANTITY + FUNCTION.

This is why we separate body composition from physical capacity—but use them together.

DEXA

Helps answer:

How much lean mass do I have?

GRIP STRENGTH

Helps answer:

What can that muscle do?

A person can have adequate muscle mass but relatively poor strength.

Another person may have less muscle mass but retain meaningful functional strength.

Looking at both provides a more complete picture than either measurement alone.

[ EXPLORE BODY COMPOSITION → ]

FUNCTION MATTERS.

Grip strength is useful because it is objective, inexpensive, repeatable and easy to track.

But it isn't a complete assessment of strength.

Long-term physical capacity also depends on the ability to:

Carry

Pull

Push

Squat

Hinge

Climb

Control your body through movement

And as we age, power—the ability to generate force quickly—becomes increasingly important for many everyday activities.

Grip strength gives us one useful measurement.

The larger goal is preserving whole-body strength and physical capability.

STAYING STRONG ONLY HELPS IF YOU CAN KEEP MOVING.

Physical capacity isn't simply aerobic fitness plus strength.

Movement quality, balance, coordination and stability also matter.

An injury can interrupt exercise, reduce activity and accelerate loss of strength and conditioning.

That is why LYVYNG's Exercise framework considers four complementary capacities:

AEROBIC ENDURANCE

Zone 2

AEROBIC CAPACITY

VO₂ Max

STRENGTH

Muscle · Strength · Power

STABILITY

Movement · Balance · Control

The objective is not simply to become fitter.

It is to remain capable.

Exercise affects virtually every part of the longevity equation.

CARDIOVASCULAR DISEASE

Cardiorespiratory fitness, physical activity and exercise influence cardiovascular health and many associated risk factors.

METABOLIC DYSFUNCTION

Skeletal muscle is an important site for glucose disposal, while regular aerobic and resistance exercise can improve metabolic health and insulin sensitivity.

NEURODEGENERATIVE DISEASE

Physical activity and cardiorespiratory fitness are associated with brain health and preservation of cognitive function.

CANCER

Regular physical activity is associated with lower risk for several cancers and contributes to healthier body composition and metabolic health.

EXERCISE ISN'T A SINGLE-DISEASE INTERVENTION.

IT AFFECTS THE ENTIRE HEALTH PROFILE.

TRACK THE TRAJECTORY.

A VO₂ max result tells us where your aerobic capacity is today.

A grip-strength measurement tells us something about your strength today.

The real value comes when we use those measurements as baselines.

Is VO₂ max improving?

Is grip strength increasing?

Are you preserving strength as you age?

Is your physical reserve increasing—or declining?

MEASURE → TRAIN → TRACK → REASSESS

KNOWING YOUR NUMBER ISN'T THE ENDPOINT.

Testing tells us where you are.

Exercise determines what you do about it.

Within LYVYNG, Exercise is organized around the four physical capacities:

Zone 2 → build aerobic endurance and efficiency

VO₂ Max → build aerobic capacity

Strength → build and preserve muscle, strength and power

Stability → preserve movement quality and reduce limitations from injury

Your baseline measurements can then become targets that are followed over time.

WHY → BASELINE → TACTIC → TARGET → TRACK → REASSESS

[ EXPLORE LYVYNG → ]

BUILD CAPACITY.

Improve your aerobic fitness.

Build and preserve strength.

Maintain stability.

Create the physical reserve you'll need for the decades ahead.

MEASURE WHAT YOUR BODY CAN DO.

[ FIND VO₂ MAX TESTING → ]

[ MEASURE GRIP STRENGTH → ]