A man in his early sixties came to see me about something unrelated, and mentioned almost in passing that he had started using his hands to push himself up out of low chairs. He had assumed it was just age. What he was describing was not his knees or his back. It was strength, quietly leaving, the way it does for most of us long before we notice.
We tend to think of muscle as something for athletes, or for looking a certain way. In a consulting room it is something far more practical. Muscle is what gets you off the floor, carries the shopping up a flight of stairs, and keeps you steady when you trip on a gutter. It is, in a real sense, the organ of independence. And from your thirties onward, you slowly start losing it.
Not all health claims are equally proven. Throughout this piece I have tagged the main ideas so you can see how solid the evidence behind each one really is.
- Strong Backed by randomised trials or large, consistent reviews.
- Moderate Good evidence overall, with some questions still open.
- Emerging Biologically promising, with long-term outcome data still developing.
- Popular · weak evidence Widely believed, but not well supported when you look closely.
Muscle does more than move you Emerging
Muscle is not only for movement. It is the largest site in the body for clearing sugar out of the bloodstream, which is part of why people with more muscle tend to handle blood sugar better. Working muscle also releases signalling molecules that talk to the brain, the bones and the immune system. This idea of muscle as a metabolic and hormonal organ, not just tissue on a frame, is genuinely exciting, and the science linking it to long-term outcomes is still catching up to the biology. That is why I have badged it Emerging rather than Strong.
What is beyond doubt is the everyday version of this. Muscle and strength are what let you stay independent: rising from a chair, carrying a grandchild, getting up off the floor, recovering your balance before a stumble becomes a fall. When people picture ageing well, this is usually what they mean, even if they have never thought of it as being about muscle.
What happens to muscle as we age Strong
The numbers are gentler than the headlines suggest, but they add up. Most people lose somewhere around 3 to 5 percent of their muscle each decade after 30, and the loss speeds up after about 60. Here is the part most people miss: strength fades faster than size. You can lose strength two to five times more quickly than you lose actual muscle bulk, and it is the strength, not the bulk, that most closely tracks with falls, frailty and how long people live.
That last point deserves care, because it is easy to overstate. Researchers can measure something as simple as grip strength and use it, across very large groups of people, to predict who is more likely to become unwell or die in the years ahead. The weakest tend to fare worse than the strongest by a clear margin. This is a strong and repeatable association. It does not prove that building muscle will make you live longer, and anyone who tells you it does is going beyond what the evidence shows. What it does tell us is that muscle and strength are a window into how well the whole body is ageing, and that they are one of the few parts of that picture you can directly change.
Illustrative only, drawn from general population patterns rather than any one person. The exact slope varies from person to person, but the shape is consistent: strength declines gradually and then faster with age, and regular resistance training flattens the curve at any age you start.
What your grip can reveal Strong
One of the simplest measures of whole-body muscle health is something your GP can check in under a minute: grip strength, measured by squeezing a small device called a hand dynamometer. It sounds almost too basic to matter. The evidence says otherwise.
In 2015, a study published in The Lancet followed close to 140,000 people across 17 countries. After accounting for other risk factors, every 5 kilogram drop in grip strength was associated with around a 16 percent higher risk of dying from any cause, and a 17 percent higher risk of dying from heart disease. In that data, grip strength predicted death more closely than blood pressure did. It is worth reading that carefully: this is an association, not proof that squeezing harder makes you live longer. Grip strength is a window into the health of muscle throughout the body, and muscle, as the rest of this article describes, is quietly doing a great deal of work.
Typical grip strength by age
Approximate ranges for one strong squeeze of the dominant hand. These are general population figures that vary with body size, sex and how the test is done. They are context, not a diagnostic threshold: your GP reads grip strength alongside everything else.
Choose an age group to see a rough typical range.
General information only, not a diagnosis. If you are curious where you sit, or you have noticed your grip, your walking pace or how easily you rise from a chair changing, that is worth raising at your next appointment.
The good news: muscle responds at any age Strong
Muscle is one of the most responsive tissues in the body, and that does not stop in later life. Trials of resistance training in adults in their seventies, eighties and beyond consistently show real gains in strength and everyday function. You are not too old, and it is not too late. As exercise evidence goes, this is about as solid as it gets.
There is one popular belief worth correcting here, because so many people hold it. Popular · weak evidence The idea is that walking, or general daily activity, is enough on its own to hold on to muscle. Walking is wonderful, and it protects your heart, your mood and a great deal else. But keeping muscle specifically takes resistance work, meaning anything that makes your muscles push or pull against a load. The Australian guidelines reflect this, recommending muscle-strengthening activity on at least two days a week. Most older Australians do none at all: only around one in six does enough strengthening activity, even though falls send tens of thousands to hospital every year and cost the health system billions.
You do not need a gym, special clothing, or heavy weights to start. Standing up from a chair without using your hands, carrying the groceries, climbing stairs, resistance bands and simple bodyweight movements all count. Two short sessions a week, working the major muscle groups, is enough to begin bending the curve. If you have painful joints, trouble with balance, or you have had a fall, an exercise physiologist or physiotherapist can build something safe around you, and that is a referral I am very happy to make.
The best time to start is now
Two beliefs stop people from ever beginning, and they sit at opposite ends of life. Younger adults tend to think this is a problem for later. Older adults tend to think the moment has passed. Both are mistaken.
If you are in your forties or fifties, you are in the most valuable window there is. The muscle and strength you build now is a reserve you draw on for decades, and it is far easier to keep muscle than to rebuild it from a low base later. Think of it as topping up an account before you need it. And if you are older, the trials are clear that you can still make real gains, even starting in your eighties. The strength you add translates directly into the things that matter: staying steady on your feet, staying out of hospital, staying in your own home. There is no age at which starting stops being worth it.
Feeding the muscle you want to keep Moderate
As we age, muscle becomes a little harder of hearing when it comes to protein. The technical name is anabolic resistance: it takes a bit more protein to send the same muscle-building signal. For many older adults that means aiming a little higher than the standard recommendation, in the region of 1.0 to 1.2 grams of protein per kilogram of body weight per day, and more again if you are active or losing weight. Spreading it across the day, roughly 25 to 40 grams a meal, works better than saving it all for dinner.
Food comes first here: eggs, dairy, fish, meat, legumes and tofu all do the job, and you do not need powders or supplements to get there. I have badged this Moderate rather than Strong because experts still debate the exact ideal amount. Your GP or a dietitian can tailor the numbers to you, which genuinely matters if you have kidney disease, where higher protein is not always appropriate.
Patients often ask about supplements for muscle. Emerging Some have been studied as an add-on to resistance training and enough protein, with results that vary a good deal between products and between people, and food remains the foundation. Quality, dose and safety differ widely, and a few can interact with medications or existing conditions. If you are considering one, it is worth raising with your GP first rather than relying on the claims on the label.
Protecting muscle while losing weight Moderate
More people than ever are losing meaningful amounts of weight, through changes to how they eat, and for some, with the help of newer weight-management medications. That raises a question worth answering plainly. Rapid weight loss of any kind, whether from dieting, surgery or medication, tends to take some muscle along with the fat. That is not unique to any one approach. It is simply how the body sheds weight. The reassuring part is that for most people the loss is mostly fat, the muscle change is modest, and strength and function generally hold up.
The way you protect muscle through weight loss is the same as the way you build it the rest of the time: resistance training on two or more days a week, and enough protein. If you are using any medication to manage your weight, that is a conversation to have with your GP, who can help you keep muscle as the weight comes down and make sure the wider plan suits you. Medication, where it is used at all, is one tool inside a much larger picture. It is never the whole plan, and the strength work and protein matter just as much.
It is also worth saying plainly that this is not about being thin. Muscle does its metabolic work at every body size. A pattern doctors call sarcopenic obesity, lower muscle paired with higher visceral fat (the fat stored around the organs rather than under the skin), can carry more metabolic risk than either feature alone, and it can sit behind a perfectly ordinary number on the scales. The weight-and-height sum behind BMI cannot tell muscle and fat apart, so two people at the same BMI can carry very different amounts of each. The goal here is not a smaller body. It is a stronger, better-muscled one, whatever your size.
The 30-second sit-to-stand check
A simple way to notice your own leg strength over time. Sit in a sturdy chair, arms crossed over your chest, and count how many times you can stand fully and sit back down in 30 seconds. This is general information to reflect on, not a diagnostic test.
This is general information only, not a diagnosis or a clinical assessment. Many things affect this number on any given day, including joint pain, recent illness and the chair you used. If your result is lower than you would like, or you have noticed it changing, it is well worth mentioning at your next appointment. Stop straight away if you feel unsteady or unwell, and check with your GP before starting if you are frail or at risk of falls.
Common questions about muscle and ageing
Evidence in this article draws on randomised controlled trial reviews of resistance training in older adults, pooled cohort studies on grip strength and mortality, the PROT-AGE Study Group position on protein intake in older people, reviews of muscle preservation during weight loss, and work on sarcopenic obesity and body composition. Australian participation and falls figures are from the Australian Institute of Health and Welfare physical activity and falls reporting. Evidence ratings reflect my reading of the current literature and are a guide, not a substitute for advice tailored to you. This is general information only. Your GP can advise on what is relevant to your individual situation.
