Executive Performance Brief #003:  Strength training is often treated as something we do to look better, lift heavier, or stay fit...but after 40, it becomes something much more valuable.  The muscle, strength, and power you build today create the physical reserve you'll depend on decades from now.  In Executive Performance Brief #003, we explore why strength should be viewed like a retirement account.  Think of it as something you consistently invest in now so you can remain strong, capable, and independent later.  Because when it comes to longevity, the goal isn't simply to add more years to your life, it's to have the physical capacity to fully live them.

Executive Insight

Most successful executives understand the concept of compounding.

You don't build financial security at age 65 by beginning to invest at 64.  You make deposits over decades, protect what you've accumulated, and allow time and consistency to work in your favor.

I believe we should think about physical capacity in much the same way.

Strength is your retirement account.

Every intelligently programmed resistance-training session is a deposit.  Every year you preserve muscle, maintain strength, and continue developing your physical capacity adds something to the reserve you may eventually need.

And just like a financial portfolio, waiting until you desperately need that reserve isn't an ideal strategy.

In Executive Performance Brief #001, I introduced the Executive Performance Pyramid - the idea that sustainable performance isn't created by optimizing one variable.  Recovery, nutrition, strength, cardiovascular fitness, objective health metrics, and accountability work together as an interconnected system.

In Brief #002, we went deeper into the aerobic side of that system.  VO₂ max and cardiorespiratory fitness give us insight into the size and efficiency of your aerobic engine.

Now we need to address the other side of physical capacity:

• Can your body produce force
• Can you maintain muscle?
• Can you lift, carry, push, pull, climb, accelerate, decelerate, stabilize, and get yourself off the ground?

And perhaps most importantly:

Will you still be able to do those things 20 or 30 years from now?

These questions change the purpose of strength training.

We're no longer training simply to look fit.

We're training to remain capable.

Muscle Is More Than Aesthetics

For decades, resistance training was often associated with bodybuilding, athletics, or younger people trying to improve their appearance.

That perception has changed considerably.

Skeletal muscle is metabolically active tissue that contributes to glucose disposal, physical function, movement, energy expenditure, and metabolic health.  Muscular strength also reflects contributions from the nervous system, muscle quality, coordination, and the ability to generate force.

Resistance training therefore affects much more than the size of your biceps.

A systematic review and meta-analysis by Ashton et al. (2020) evaluated 173 randomized controlled trials examining resistance exercise and cardiometabolic health.  Resistance training was associated with improvements in outcomes including blood pressure, insulin regulation, insulin resistance, vascular function, and cardiorespiratory fitness, although the authors noted that the certainty of evidence varied across outcomes (Ashton et al., 2020).

That should change how we talk about strength training.

This isn't simply:

How much can you bench press?

It is:

How much physiological and functional capacity are you building?

The Problem After 40: Capacity Doesn't Automatically Stay With You

Aging is unavoidable.

Becoming weak is not entirely inevitable.

Changes in skeletal muscle mass, neuromuscular function, physical activity, recovery, and other biological factors can contribute to declining physical capacity as we get older.  What makes this especially important is that muscle mass and muscular strength are not identical.

You can lose strength for reasons beyond simply losing muscle tissue.

This distinction has led researchers to use terms such as sarcopenia, referring broadly to age-associated losses involving skeletal muscle and function, and dynapenia, describing age-related loss of muscular strength that cannot be explained solely by loss of muscle mass.

For the executive, the terminology is less important than the implication:

Maintaining body weight does not mean you are maintaining physical capacity.

A 55-year-old can weigh exactly what he or she weighed at 35 while possessing a very different body composition and very different levels of strength, power, aerobic fitness, and metabolic health.

The bathroom scale won't tell you that.

Your mirror may not tell you that.

Performance testing often will.

And that is why I increasingly believe adults should ask not only, "What do I weigh?"

They should ask:

"What can my body actually do?"

Research Summary: Strength Is Associated With Longevity

The relationship between muscular strength and long-term health is compelling.

García-Hermoso et al. (2018) conducted a systematic review and meta-analysis involving 38 studies and approximately 1.9 million participants.  Higher handgrip strength was associated with lower all-cause mortality risk, and greater knee-extension strength was also associated with lower mortality risk (García-Hermoso et al., 2018).

That doesn't mean grip strength itself is magically keeping someone alive.  Grip strength can serve as a practical marker reflecting broader physical capacity and health status.

But the association reinforces an important concept:

Strength tells us something meaningful about the organism.

The evidence for resistance training itself is also noteworthy.

Shailendra et al. (2022) conducted a systematic review and meta-analysis examining resistance training and mortality.  Compared with no resistance training, performing any resistance training was associated with a 15% lower risk of all-cause mortality, a 19% lower risk of cardiovascular mortality, and a 14% lower risk of cancer mortality in the included observational evidence (Shailendra et al., 2022).

Another systematic review and meta-analysis involving more than 370,000 participants found resistance training was associated with a 21% lower all-cause mortality risk compared with no exercise. When resistance and aerobic training were combined, the association was even stronger (Saeidifard et al., 2019).

That last point is particularly important within the Executive Performance Pyramid.

Brief #002 wasn't an argument to replace strength training with cardio.

And Brief #003 isn't an argument to stop developing your aerobic system so you can lift more weights.

The evidence increasingly supports the value of doing both.

Your aerobic engine and your muscular system solve different performance problems.

Develop both.

Strength, Muscle, and Power Are Not the Same Thing

There is another distinction executives should understand.

Muscle mass

This refers to the amount of skeletal muscle you possess.

Muscular strength

Strength refers to your ability to produce force.

Muscular power

Power incorporates how rapidly force can be produced.

In simplified terms:

Strength asks: Can you produce force?

Power asks: How quickly can you produce it?

That difference matters.

Consider getting out of a chair slowly versus quickly catching yourself when you stumble.

Or gradually lifting something from the floor versus reacting when an object suddenly shifts.

Or climbing stairs versus rapidly stepping up to regain balance.

Daily life requires more than maximal strength.

It requires the ability to produce force at the appropriate speed and time.

This is one reason a complete resistance-training program should eventually consider more than muscle size.

For appropriate individuals, training may include exercises designed to preserve the ability to produce force quickly by using carefully selected loads, medicine balls, faster concentric actions, jumps, step variations, or other movements appropriate to the person's age, experience, orthopedic history, and ability.

That does not mean every 60-year-old should start performing box jumps.

It means training should reflect the physical qualities we're trying to preserve.

Strength Is Also a Metabolic Asset

Muscle doesn't become valuable only when you're lifting something.

Skeletal muscle plays an important role in glucose metabolism.

After consuming carbohydrates, glucose enters the bloodstream.  Skeletal muscle represents an important site for glucose uptake and storage, and muscular contractions themselves stimulate mechanisms that facilitate glucose uptake.

This is one reason resistance exercise can play a meaningful role in metabolic health.

The meta-analysis by Ashton et al. (2020), for example, found improvements in fasting insulin and insulin resistance following medium-term resistance exercise interventions, particularly among individuals with elevated cardiometabolic risk.

This becomes increasingly relevant to the executive who spends much of the day sitting.

Think about the modern work environment:

• Eight or ten hours at a desk.
• Meals during meetings.
• Long flights.
• Business dinners.
• Poor sleep.
• High stress.
• Reduced movement.

Then perhaps three workouts per week.

The answer isn't simply "burn more calories."

Research Summary: Resistance Training Doesn't Require Living in the Gym

One misconception worth addressing is that meaningful strength training requires enormous amounts of time.

It doesn't.

The mortality literature should not be interpreted as establishing an exact "longevity dose" of resistance exercise—these are largely observational data and cannot establish cause and effect.

But the findings are still interesting.

In the Shailendra et al. (2022) meta-analysis, the relationship between weekly resistance-training duration and mortality was nonlinear, with the largest estimated risk reduction around roughly 60 minutes per week in the available studies.  The authors also emphasized that additional research is needed to understand the dose-response relationship more clearly.

The practical message isn't:

"Train exactly 60 minutes."

It's this:

You don't need to become a bodybuilder for resistance training to matter.

Consistency beats occasional extremes.

Two or three intelligently programmed strength sessions each week can represent an enormous shift for an adult who currently does none.

And the program can evolve as capacity improves.

Performance Metric: Strength Reserve

VO₂ max was the featured metric in Brief #002.

For Brief #003, I want to introduce something slightly different:

Strength Reserve

This isn't one standardized clinical number.

It's a coaching concept.

I think of strength reserve as the gap between the force required by your normal life and the maximum force your body can safely produce.

The larger that gap, the easier many everyday physical demands become.

There are several ways we can objectively monitor muscular capacity.

Grip strength is simple, quick, inexpensive, and has substantial epidemiological research behind it.

Lower-body strength can be assessed using appropriately selected squat, leg-press, sit-to-stand, or other standardized testing depending on the individual.

Upper-body pushing and pulling capacity can also be tracked.

And for experienced lifters, relative strength—strength in relation to body mass—can provide another useful performance marker.

The goal isn't to turn every executive into a powerlifter.

The goal is to stop guessing.

Establish a baseline.

Train.

Measure again.

If strength is increasing while movement quality, recovery, cardiovascular fitness, and overall health remain strong, we're probably moving in the right direction.

Your Strength Training Doesn't Need to Look Like It Did at 25

This is particularly important for people over 40.

Training hard still matters.

Progressive overload still matters.

Effort still matters.

But intelligent programming becomes increasingly valuable.

The goal isn't to prove that you can survive the workout.

The goal is to create the adaptation while managing unnecessary risk and fatigue.

That can mean manipulating:

Load.

Repetitions.

Tempo.

Range of motion.

Exercise selection.

Training frequency.

Rest periods.

Volume.

Proximity to muscular failure.

And recovery between sessions.

Some days heavy loading may make sense.

Other days moderate loads, unilateral exercises, slower tempos, machines, cables, dumbbells, or bodyweight exercises may provide exactly the stimulus we want.

Training should serve the objective.

The objective should never become surviving the training.

Executive Action Plan

So what should an executive over 40 actually do?

Start here.