Muscle Power and Longevity: Being Strong Isn’t Enough

We talk a lot about strength as we get older.

And rightly so.

Maintaining muscle mass and strength is one of the most important things we can do to preserve physical capability, independence and resilience as we age.

But there is another physical quality that receives far less attention.

Power.

A study published in Mayo Clinic Proceedings compared muscle strength and muscle power as predictors of mortality in middle-aged and older adults.

The findings were striking.

Being strong mattered.

But being able to produce force quickly appeared to tell us considerably more.

Strength and Power Aren’t the Same Thing

These terms are often used interchangeably, but physiologically they describe different qualities.

Strength is your ability to produce force.

Power incorporates how quickly that force can be produced.

In simplified terms:

Power = force × velocity.

Imagine two people who can both lift the same weight.

One moves it slowly.

The other can accelerate it rapidly.

Their maximum strength may be similar, but their ability to produce power is very different.

And as we get older, that distinction becomes increasingly important.

Getting out of a chair quickly.

Taking a rapid step when you lose your balance.

Climbing stairs.

Catching yourself during a stumble.

Moving rapidly to avoid an obstacle.

These aren’t simply strength tasks.

They require you to generate sufficient force quickly enough for it to matter.

What Did the Study Find?

Researchers examined 3,889 men and women aged 46–75 from the CLINIMEX Exercise prospective cohort.

Participants had measurements of both muscle strength and muscle power, adjusted relative to body weight, and were followed for a median of 10.8 years.

During that period, 373 of 2,636 men and 111 of 1,253 women died.

Researchers then examined how relative strength and relative power related to mortality.

The difference was substantial.

After adjustment for other relevant factors, men in the lowest category of relative muscle power had approximately 5.9 times the mortality hazard of those in the highest category.

For women, it was approximately 6.9 times.

The equivalent associations for relative muscle strength were much smaller and were not statistically significant in the fully adjusted comparison between the lowest and highest groups.

That doesn’t mean strength suddenly doesn’t matter.

It means muscle power provided considerably stronger prognostic information in this particular cohort.

Why Might Power Matter So Much as We Age?

One reason is that ageing doesn’t affect every component of physical performance equally.

You can retain a reasonable amount of maximum strength while gradually losing the ability to express that strength rapidly.

And daily life rarely gives us unlimited time to produce force.

If you trip, you don’t have five seconds to produce enough force to recover your balance.

You need it now.

If you’re rising from a chair, negotiating stairs or reacting to an unexpected movement, the nervous system and muscular system need to produce and coordinate force rapidly.

That’s why somebody can still appear reasonably strong but become noticeably slower and less reactive as they age.

The issue isn’t simply:

Can you produce force?

It’s also:

How quickly can you access it?

Strength Is Still the Foundation

This is where I would be careful with headlines claiming that power is simply “better than strength”.

You cannot produce meaningful power without the ability to produce force in the first place.

Strength provides the foundation.

If someone is profoundly weak, our first priority probably isn’t sophisticated velocity-based training.

We need to build their basic capacity.

Can they squat?

Can they hinge?

Can they push?

Can they pull?

Can they carry?

Can they repeatedly stand from a chair?

Once sufficient strength exists, however, we shouldn’t assume that simply making somebody stronger indefinitely addresses every aspect of physical ageing.

At some point, we also want them to retain the ability to use that strength quickly.

What Does Power Training Actually Mean?

Mention explosive training and many people immediately imagine Olympic weightlifting, maximal sprinting or depth jumps.

It doesn’t have to mean any of those things.

Power training is relative to the individual.

For a trained athlete, it might include jumps, throws, Olympic-lifting derivatives, dynamic-effort resistance training or sprint work.

For someone in their seventies, it might simply mean performing a sit-to-stand with the intention of rising quickly rather than slowly grinding out every repetition.

The exercise needs to match the person.

The underlying principle is the same:

Produce force with intent and speed.

This distinction matters because training older adults doesn’t mean treating them as fragile.

We scale the exercise.

We scale the load.

We scale the range.

We scale the complexity.

But where appropriate, we can still train the nervous and muscular systems to move with intent.

Why “Slow and Controlled” Isn’t the Whole Answer

“Slow and controlled” is one of the most common instructions given to older adults in exercise settings.

Sometimes that’s exactly what is required.

When somebody is learning an exercise, returning from injury or developing control, deliberately slowing the movement can be extremely useful.

But it shouldn’t automatically become the permanent destination.

If every exercise is always performed slowly, we’re primarily practising the ability to move slowly.

There are circumstances in everyday life where we need the opposite.

We need to react.

We need to accelerate.

We need to produce force rapidly.

A well-designed programme can therefore include both controlled strength work and appropriately prescribed faster movements.

The two aren’t competitors.

They develop complementary qualities.

Relative Power Matters Too

There is another important detail in this research.

The investigators didn’t simply compare how much absolute force or power participants could produce.

They assessed relative strength and power — performance in relation to body weight.

That makes intuitive sense when we’re talking about physical function.

In everyday life, the object you have to move most frequently is yourself.

Standing.

Walking.

Climbing.

Recovering balance.

Getting off the floor.

Your ability to generate force relative to the mass you need to move is highly relevant to all of them.

This is another reason why healthy ageing isn’t simply about becoming as large or as absolutely strong as possible.

The objective is usable physical capacity.

This Study Doesn’t Prove Power Training Makes You Live Longer

This distinction is important.

This was a prospective observational cohort study.

It found a strong association between relative muscle power and subsequent mortality.

It does not prove that adding power exercises to your programme will directly extend your lifespan.

People with greater muscle power may differ from people with low muscle power in many other ways related to health, disease burden, physical activity and overall physiological reserve.

The researchers adjusted statistically for important potential confounders, but observational research cannot remove every possible explanation.

So we shouldn’t turn the study into:

“Do explosive training and you’ll live longer.”

That’s not what the research demonstrated.

What it does suggest is that muscle power may be an important marker of physical ageing and a quality worth assessing and preserving. The authors themselves concluded that evaluating and training muscle power could have clinical and practical relevance.

And This Isn’t the Only Research Pointing in This Direction

The finding isn’t completely isolated.

Previous longitudinal research has also reported relationships between muscle power and mortality. A study of 993 men followed longitudinally found arm-cranking power to be a stronger mortality predictor than isometric arm strength.

Research in older adults has similarly associated very low relative lower-limb power with greater mortality and hospitalisation risk, although some associations weakened after adjustment for other health factors.

Taken together, the emerging picture is more interesting than simply saying:

“Get stronger as you age.”

We should probably be thinking about maintaining the ability to produce that strength rapidly as well.

What Should Training Look Like After 40, 50 or 60?

Not one magic exercise.

And certainly not a programme consisting entirely of explosive movements.

For long-term physical capability, I want people developing several qualities.

Strength to produce force.

Muscle mass to maintain physical reserve.

Cardiovascular fitness to sustain activity.

Balance and coordination to control movement.

Mobility sufficient for the tasks they need to perform.

And power — the ability to produce force quickly when life demands it.

Those qualities work together.

A well-designed programme should reflect that.

For one person, power training might involve a medicine-ball throw or jump.

For another, a fast concentric squat with a manageable load.

For someone older or less conditioned, it may simply begin with standing from a chair as quickly and safely as they can.

The method changes.

The physiological objective doesn’t.

Train for Capability

Strength remains enormously important.

I would rather have a 70-year-old who strength trains than one who doesn’t.

But strength isn’t the final destination.

The objective isn’t simply to create someone who can grind through a heavy repetition in the gym.

We want somebody who can move their body confidently.

Who can react when they stumble.

Who can get off the floor.

Who can climb stairs.

Who can carry things.

Who can continue participating in sport.

Who possesses enough physical reserve to tolerate the inevitable challenges that come with ageing.

Strength gives us the capacity to produce force.

Power gives us the ability to use that force quickly.

And this research suggests that the second quality may tell us considerably more about long-term health than we’ve traditionally appreciated.

So yes, get strong.

But don’t spend the rest of your life only practising how to move heavy things slowly.

Stay strong. Stay fast. Stay capable.

That’s a much better definition of training for longevity.

Reference: Araújo CGS, Kunutsor SK, Eijsvogels TMH, et al. Muscle Power Versus Strength as a Predictor of Mortality in Middle-Aged and Older Men and Women. Mayo Clinic Proceedings. 2025;100(8):1319–1331. doi:10.1016/j.mayocp.2025.02.015.