Why Strength Matters as We Age

What happens to muscle as we age?

Ageing is associated with gradual changes in skeletal muscle.

These can include reductions in:

• —muscle mass
• —muscle strength
• —muscle power
• —neuromuscular function.

Importantly, strength can decline faster than muscle size alone would suggest.

This means that somebody may not look dramatically different but can gradually find everyday tasks harder.

What is sarcopenia?

Sarcopenia describes an age-associated disorder characterised by low muscle strength, with reduced muscle quantity or quality also contributing to the diagnosis.

It is more than simply “having small muscles”.

Sarcopenia can affect:

• —mobility
• —falls risk
• —physical independence
• —recovery from illness
• —quality of life.

Not everyone develops clinically significant sarcopenia as they age, and ageing does not mean that major weakness is inevitable.

Physical activity — particularly resistance exercise — can help counter many of these changes.

Why does strength matter in everyday life?

Think about ordinary movements.

Getting out of a chair requires force from the muscles around the hips and knees.

Climbing stairs requires strength and balance.

Carrying bags requires grip, shoulder, arm and trunk strength.

Getting up after a fall requires coordinated whole-body strength.

When somebody has a large reserve of strength, these tasks require only a fraction of their maximum capacity.

As that reserve declines, ordinary activities start consuming a much greater proportion of what the body can produce.

This is why maintaining strength can be so important for independence.

Does strength training actually work in older adults?

Yes.

Resistance training remains effective well into later life.

A 2024 systematic review and meta-analysis examining different volumes of resistance training in older adults found significant improvements in muscle strength and physical function.^[2]

Another large network meta-analysis incorporating more than 150 resistance-training trials found that even relatively low training volumes can improve several measures of physical function, muscle size and lean body mass in healthy older adults.^[3]

The message is reassuring:

You do not need an extreme bodybuilding programme to benefit from resistance exercise.

What counts as strength training?

Strength training means working muscles against resistance.

That resistance might come from:

• —free weights
• —resistance machines
• —resistance bands
• —body weight
• —weighted household objects
• —certain forms of Pilates
• —heavy gardening
• —carrying loads.

Exercises might include:

• —squats
• —sit-to-stands
• —lunges
• —step-ups
• —rows
• —presses
• —deadlift-type movements
• —calf raises
• —loaded carries.

The appropriate exercises depend on the person's ability, medical history and experience.

Do I need to go to a gym?

No.

A gym provides convenient equipment and allows resistance to be progressively increased, but it is not essential.

At home, somebody might begin with:

• —repeated chair stands
• —wall or elevated push-ups
• —resistance-band rows
• —step-ups
• —calf raises
• —carrying manageable loads.

The important principle is that the muscles encounter enough resistance to adapt over time.

What is progressive overload?

For strength to continue improving, exercise usually needs to become progressively challenging.

This is called progressive overload.

It might mean gradually increasing:

• —weight
• —repetitions
• —sets
• —resistance-band tension
• —movement difficulty.

You do not need to increase something every workout.

The principle simply means that doing exactly the same easy activity indefinitely is unlikely to continue producing the same adaptation.

How often should I train?

UK Chief Medical Officers' guidance recommends muscle-strengthening activity involving the major muscle groups on at least 2 days each week.^[1]

That is a useful public-health target.

The optimal programme varies according to:

• —age
• —experience
• —health
• —recovery
• —goals
• —training intensity.

Someone completely new to resistance exercise does not need a complicated six-day programme.

Consistency matters far more.

Do I need heavy weights?

Not necessarily.

Different resistance-training approaches can improve strength and muscle.

Heavier resistance can be particularly effective for maximising strength, while lighter resistance can still stimulate muscle when performed with sufficient effort.

For older people who are new to training, good technique and gradually increasing resistance are more important than trying to lift maximal loads.

What about muscle power?

Strength is the ability to produce force.

Power relates to producing that force quickly.

This matters because many everyday situations — catching your balance, stepping quickly or recovering from a stumble — happen rapidly.

Ageing can affect power substantially.

Once a good strength foundation is established, appropriately supervised faster movements may be useful for selected older adults.

They are not suitable for everyone and should be introduced according to ability.

Does strength training help prevent falls?

Falls are multifactorial.

Strength alone cannot prevent every fall.

But poor lower-limb strength and impaired balance can contribute to instability.

For older adults, UK guidance therefore specifically recommends activities aimed at maintaining or improving:

• —strength
• —balance
• —flexibility

on at least 2 days each week.^[1]

People at increased falls risk may benefit from targeted programmes supervised by appropriately trained healthcare or exercise professionals.

What about bones?

Bones respond to mechanical loading.

Weight-bearing and resistance exercise can help support bone health.

This becomes increasingly important with age, particularly after menopause and in people at risk of osteoporosis.

However, if someone has significant osteoporosis or previous fragility fractures, the exercise programme may need modification.

Does having more muscle improve metabolism?

Skeletal muscle plays an important role in glucose disposal and metabolic health.

Resistance exercise can improve:

• —insulin sensitivity
• —glucose handling
• —body composition
• —physical capacity.

Strength training therefore complements aerobic exercise rather than competing with it.

Cardio or weights: which matters more?

Ideally:

both.

Aerobic activity supports:

• —cardiovascular fitness
• —endurance
• —blood pressure
• —metabolic health.

Resistance exercise supports:

• —strength
• —muscle mass
• —function
• —bone health.

The UK guidelines recommend combining aerobic activity with strengthening work.^[1]

Is muscle strength linked with living longer?

Observational research consistently links higher levels of physical function and muscle-strengthening activity with better long-term health outcomes.

A systematic review and meta-analysis of cohort studies found muscle-strengthening activity was associated with lower risks of all-cause mortality and several major non-communicable diseases.^[4]

However, this requires careful interpretation.

These studies demonstrate associations. They do not prove that lifting a particular weight will add a specific number of years to somebody's life.

The stronger argument for resistance training is broader:

it improves strength and physical function — qualities that help preserve independence and capability as we age.

Does grip strength matter?

Grip strength is often used in research and clinical assessment because it is quick and relatively easy to measure.

Low grip strength can act as a marker of reduced overall physical capacity.

But you should not become obsessed with one grip-strength number.

The more meaningful question is whether you can maintain the strength required for everyday life.

What about protein?

Resistance exercise provides the stimulus for muscle adaptation.

Adequate nutrition provides the building blocks.

Protein intake therefore matters, particularly in older adults.

However, protein requirements vary according to:

• —body size
• —activity
• —overall diet
• —kidney function
• —medical conditions.

A future Live, Onward article will explore protein and healthy ageing separately.

Am I too old to start?

No.

Older adults can improve strength and physical function through resistance training.

Research includes participants well into later life.

The programme simply needs to reflect the person's starting point.

For somebody who has been inactive for years, the first goal might simply be:

• —controlled chair stands
• —light resistance work
• —regular walking
• —balance practice.

Progress can come later.

What if I have arthritis?

Having osteoarthritis does not automatically mean avoiding strength training.

Strengthening the muscles around a joint can form an important part of managing several musculoskeletal conditions.

However, exercise may need to be adapted according to:

• —pain
• —joint mobility
• —severity of disease
• —previous surgery
• —other health issues.

Persistent or severe symptoms deserve professional assessment.

What if I have heart disease?

Many people with stable cardiovascular disease benefit from exercise, including resistance training.

However, somebody with:

• —unstable chest symptoms
• —recent cardiac events
• —uncontrolled blood pressure
• —significant rhythm problems
• —other unstable medical conditions

may need individual advice before beginning vigorous training.

Cardiac rehabilitation can be particularly valuable after certain cardiovascular events.

How do I start?

A simple starting approach might involve training major muscle groups around twice per week.

For example:

Lower body

• —sit-to-stand
• —squat variation
• —step-up
• —calf raise

Push

• —wall push-up
• —machine chest press
• —dumbbell press

Pull

• —resistance-band row
• —cable row
• —supported dumbbell row

Carry and trunk

• —loaded carry
• —appropriate trunk-stability exercises.

The exact programme is less important than:

starting safely + progressing gradually + staying consistent.

Do I need to train until complete failure?

No.

Exercises need to be challenging enough to stimulate adaptation, but beginners do not need to push every set to the absolute limit.

Technique matters.

Leaving some capacity in reserve can be sensible, particularly when learning movements.

What about soreness?

Some muscular soreness after unfamiliar exercise is common.

It usually settles.

Severe pain, significant joint swelling, chest symptoms, fainting or other concerning symptoms should not simply be dismissed as normal exercise soreness.

The Live, Onward perspective

We often talk about longevity in terms of blood tests, supplements and new technologies.

But imagine yourself at 75 or 85.

Can you:

• —get out of a chair?
• —climb stairs?
• —carry your own shopping?
• —play with grandchildren?
• —travel?
• —get yourself off the floor?
• —continue doing the hobbies you love?

That is what strength is really protecting.

Muscle is not simply about how you look today. It is part of your reserve for the decades ahead.