Bone health, muscle mass and ageing well: why strength matters more than you think

When most people think about ageing well, they think about staying slim, keeping their joints moving, or trying to avoid illness. What often gets missed is this: one of the biggest predictors of how well you age is not how light you are. It is how capable you are.

Can you carry your shopping? Can you get up from the floor? Can you catch yourself if you trip? Can you stay steady on your feet, remain independent, and keep doing the things you enjoy?

These are not just “fitness” questions. They are quality-of-life questions. And behind many of them sit two things that matter far more than most people realise: muscle mass and strength.

When most people think about ageing well, they think about staying slim, keeping their joints moving, or trying to avoid illness. What often gets missed is this: one of the biggest predictors of how well you age is not how light you are. It is how capable you are.

As we get older, muscle mass and strength naturally decline, and this loss contributes to reduced mobility and independence. The National Institute on Aging notes that muscle mass and strength typically peak around age 30 to 35, then gradually decline, with the rate of decline speeding up later in life. It also highlights that mobility limitations in older adults are linked with falls, chronic disease, nursing home admission and mortality. 

That is why strength training is not just about aesthetics, sport, or performance. It is about staying well for longer. Ageing well is not just about living longer Longevity is often talked about as though it only means adding more years to life. But most people do not just want a longer life. They want a life they can still live well. They want to remain active, independent and confident in their body. They want to be able to travel, garden, play with grandchildren, carry bags, walk upstairs, get down to the floor and back up again, and recover well when life throws something unexpected at them.

That is where strength becomes so important.

Muscle is protective. It helps you produce force, control movement, absorb load, stay balanced and manage everyday tasks. Stronger muscles also help support bone health and reduce fall risk, which matters more and more as we age. The NIAMS patient guidance states that exercise helps strengthen both muscles and bones, improves balance and coordination, and helps prevent falls and fractures. 

Why muscle mass matters:

You do not need to be a bodybuilder to benefit from muscle.

Muscle is part of the reserve your body draws on as you age. It supports metabolism, movement, balance, joint support and physical resilience. Losing too much of it can make everyday tasks harder and gradually shrink your world. This is one reason age-related muscle loss matters so much. The National Institute on Aging describes sarcopenia as the age-related loss of muscle mass and strength and explains that staying active, including strength training, can help slow this decline and preserve mobility and independence. 

Put simply, muscle gives you options.

It gives you more buffer when you are tired, unwell, stressed, or recovering from injury. It gives you more confidence in movement. And it gives you a better chance of remaining physically independent later in life.

The “longevity markers” people should pay more attention to:

There are a few simple physical markers that tell us a lot about how well your body is functioning. They are not perfect in isolation, but they are useful.

Grip strength:

Grip strength may sound small, but it has become one of the most widely used markers of overall health and function. A 2019 review described grip strength as an “indispensable biomarker” in older adults and noted links between lower grip strength and disability, morbidity, mortality, future function and even bone mineral density. A 2022 study also reported strong evidence that lower handgrip strength is associated with higher all-cause, cancer and cardiovascular mortality risk. 

That does not mean your hand strength alone determines your future. But it does tell us something important: strength is not cosmetic. It is deeply tied to health.

Getting up from the floor

Being able to get down to the floor and rise again without help is a powerful sign of whole-body function. It reflects a mix of strength, balance, coordination, mobility and confidence.

A well-known study found that the ability to sit and rise from the floor was associated with all-cause mortality, which is one reason the sitting-rising test gained so much attention. More recent work has continued to explore floor-rise ability because it reflects practical movement capacity that really matters in daily life. 

For patients, this matters in a very real way. If you trip, fall, play with children on the floor, or need to kneel and stand, this is not a theoretical skill. It is everyday independence.

Chair rises, walking speed and balance

Other simple markers such as how easily you can rise from a chair, how steadily you walk, and how well you balance are also strongly linked to function as you age. The National Institute on Aging highlights the Short Physical Performance Battery, which measures balance, walking speed and repeated chair stands, as a long-used way to track mobility and muscle performance in ageing research. 

These markers matter because they reflect whether your body can still do life well, not just whether your blood tests look acceptable on paper.

A 2019 review described grip strength as an “indispensable biomarker” in older adults and noted links between lower grip strength and disability, morbidity, mortality, future function and even bone mineral density.

Bone health and muscle health are linked:

Bone health and muscle health are often spoken about separately, but in real life they are closely connected. Stronger muscles help you tolerate loading, move with more confidence and reduce your fall risk. Bones also respond to loading, which is one reason exercise is so important for skeletal health. NIAMS notes that resistance training places stress on bones and can make them stronger, while weight-bearing activity also helps build and maintain healthy bones. 

That means bone health is not just about calcium, vitamin D and hoping for the best. It is also about giving your body a reason to stay strong. For many people, especially in midlife and beyond, this is where structured resistance training becomes one of the most valuable things they can do.

Why strength training matters more than most people think:

Many adults know they “should” exercise, but they often picture exercise as walking more, doing a class now and then, or trying to be generally active.

All of that is helpful. But it is not the full picture.

The World Health Organization recommends that adults do muscle-strengthening activities involving major muscle groups on two or more days per week, and for older adults with poorer mobility, balance-focused activity on three or more days per week as well.  That recommendation is there for a reason.

Strength training helps maintain muscle, support bone, preserve function and reduce the physical drop-off that many people wrongly assume is inevitable. The National Institute on Aging states that strength training can benefit older adults by maintaining muscle mass, improving mobility and increasing the healthy years of life. This does not mean you need to train like an athlete.

It means your body should probably be asked to do more than the bare minimum.

What this looks like in real life:

For you, strength training might mean learning how to squat to a chair more confidently. It might mean carrying heavier shopping without your back flaring up. It might mean being able to get off the floor without needing to grab onto furniture. It might mean feeling steadier on stairs. It might mean keeping enough strength and reserve to carry on doing the hobbies and routines that make you feel like yourself.

This is one of the reasons we care about testing and markers at Unity. Not because we want to reduce you to a score, but because practical markers can help show where your current capacity sits and where your biggest opportunities are.

If your grip strength is poor, your balance is limited, your chair rise is slow, or getting up from the floor feels impossible, that is not something to be ashamed of. It is useful information. It tells us where to start.

What we believe at Unity:

At Unity, we do not see ageing well as simply avoiding disease.

We see it as building and protecting capacity.

That means helping you keep the physical qualities that support independence: strength, balance, confidence, mobility, aerobic fitness and resilience. It means not waiting until someone is already frail, fearful or struggling before talking about muscle and function. It also means appreciating that “normal ageing” and “optimal ageing” are not the same thing. Some decline may be common. That does not mean it should be accepted without question.

The takeaway:

• If you want to age well, do not just ask whether you are active.

• Ask whether you are strong enough for the life you want to keep living.

• Can you grip well? Can you get up from the floor? Can you rise from a chair easily? Can you carry, climb, balance and recover?

• These are not minor details. They are meaningful signs of how well your body is coping with the demands of life, and they are things you can work on.

• Because ageing well is not just about adding years.

• It is about keeping your strength, your freedom and your options for as long as possible.

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References

Araújo, C.G.S. and colleagues, 2014. Ability to sit and rise from the floor as a predictor of all-cause mortality. European Journal of Preventive Cardiology. 

Bohannon, R.W., 2019. Grip strength: an indispensable biomarker for older adults. Clinical Interventions in Aging. 

López-Bueno, R. and colleagues, 2022. Thresholds of handgrip strength for all-cause, cancer, and cardiovascular mortality risk in adults. Journal of Cachexia, Sarcopenia and Muscle. 

National Institute on Aging, 2022. How can strength training build healthier bodies as we age? 

National Institute of Arthritis and Musculoskeletal and Skin Diseases, 2023. Exercise for your bone health. 

World Health Organization, 2026. Physical activity.