Muscle changes as we age, but the evidence is clear that it can still grow stronger well into later life. Here is what the research and public health guidance actually say.

Somewhere along the way, a stubborn idea took hold: once you pass a certain birthday, building muscle is off the table and decline is inevitable. It is one of the most discouraging myths in fitness, and it keeps people away from exercises that could genuinely help them stay strong and independent. The research and public health guidance tell a very different story. Here are the most common beliefs about muscle and ageing, and what the evidence actually shows.

Myth: Muscle building stops after middle age

There is a kernel of truth underneath this myth, which is partly why it spreads. Muscle mass does change with age. You naturally begin losing muscle gradually from about age 30, the pace picks up after 50, and in females it speeds up further with menopause. Health authorities in the United States put the typical decline at about 3 to 5 per cent of muscle mass per decade from around age 30, with changes often becoming more noticeable by 60.

But a natural slowdown is not the same as a hard stop, and it is not always ageing doing the damage. Ageing, inactivity and weight loss are common reasons for muscle loss, but health conditions and some medicines can be behind it too. That matters, because it means losing strength is not something to shrug off as “just getting older”. Healthdirect, Australia’s national health information service, is clear on this point: fading strength deserves a proper medical review rather than a wave of the hand.

Fact: Muscle responds to training at any age

Here is where the myth falls apart. Harvard Health ranks weight training above every other approach for holding on to the muscle you have as you age, and even for regaining some that has already been lost. It also reports that two full-body sessions a week can deliver measurable strength gains, with steady training often producing noticeable results between the fourth and sixth week.

The same message comes from the clinical side. A review of sarcopenia, the decline of skeletal muscle with age, found that good nutrition and the right kind of exercise remain the most effective way to manage the condition. Healthdirect likewise notes that eating plenty of protein, combined with an exercise program that includes resistance work, can address muscle loss. Basic physiology works in your favour too: at any age, regular movement helps your muscles hold their strength or build it.

None of this requires heroic effort. You do not need a bodybuilder’s program. If you are unsure how sets, repetitions and rest fit together, our guide to strength training for beginners: sets, reps and rest covers the structure in plain terms.

Myth: Walking alone is enough to keep muscle

Walking is a genuinely valuable habit. It builds aerobic fitness, it is free, and short sessions count, so even a 10-minute stroll or some stretching helps after sitting for most of the day. If walking is the movement you enjoy and actually do, that is worth a lot.

The gap appears when walking becomes the only plan. Aerobic exercise strengthens the heart and lungs, but it does not place the kind of load on muscles that prompts them to stay strong, and it does little for balance. Healthdirect points out that activities which load the muscles and bones improve their condition, and in doing so lower the chance of falls and thinning bones. It recommends strength training at least twice a week alongside regular stretching and balance exercises. Nutrition plays a role too: after 60, nutritional needs change, and strength or resistance training, if you can manage it, supports muscle strength and function and can even build both.

Fact: Resistance and balance exercises matter too

The World Health Organization is specific about this. Adults of all ages are advised to work their major muscle groups on two or more days each week. For adults aged 65 and above there is an extra recommendation: those with poor mobility should add balance-focused activity on three or more days a week to help prevent falls. WHO’s broader guidance adds that older adults should choose activities emphasising balance and coordination as well as strength work, because this combination helps prevent falls and supports overall health.

Putting it together, a typical week might look like this:

Activity	What the guidelines suggest
Aerobic activity	150 minutes of moderate activity a week, 75 minutes of vigorous activity, or an equivalent mix
Muscle strengthening	Major muscle groups worked on 2 or more days a week
Balance	For those with poor mobility, balance-focused activity on 3 or more days a week
Everyday movement	Move regularly through the day rather than sitting for long stretches; about 30 minutes of moderate activity on most days is a common aim

Our explainer on Australia’s 24-hour movement guidelines unpacks these targets in more detail. The encouraging part is that strength work can be simple: sit-to-stands from a chair, calf raises at the kitchen bench, resistance bands or light dumbbells all count.

Myth: Soreness means you have damaged something

New routines can leave muscles feeling tender, and for anyone starting later in life this can be alarming enough to abandon training altogether. The practical, evidence-based response is less dramatic than the fear. Guidelines are consistent on this point: ease in and increase the challenge gradually. Harvard Health recommends leaving at least 48 hours between strength sessions so muscles have time to recover, which is why rest days are part of the plan rather than a sign of weakness.

What deserves attention is pain that does not settle, or a genuine feeling of getting weaker. That is the point where the advice shifts from adjusting your routine to seeing your doctor, because strength loss has causes that are worth checking properly.

When to get individual advice about your own situation

The general picture is encouraging, but your own body, health conditions and medicines all shape what is safe and sensible for you. Healthdirect advises anyone living with a medical condition, or who has not been exercising much, to check in with their doctor before taking up a new kind of exercise program. If you are considering more intense exercise, it also suggests a medical check first. If you are over 60, it is worth asking about your diet too, because people in that age group need more of some nutrients, and a reduced appetite can mean packing more protein and other nutrients into less food.

And if your strength is fading, do not file it under “ageing” before a professional has looked at it. Doctors have straightforward tests that can show whether muscle loss may be happening and what is behind it.

The myths around muscle and ageing are persistent, but the evidence points one way: muscle responds to training throughout life, and the guidelines expect older adults to be doing it. If you are ready to start, our articles on what people get wrong about strength training after 60 and sore after exercise? What DOMS is and what helps will help you train sensibly from day one.

Questions we get

Can you build muscle after 60?

Yes. Harvard Health describes weight training as the most effective way to hold on to muscle as you age and to regain some that has been lost, and two full-body sessions a week can bring measurable strength gains.

How often should older adults do strength training?

Australian and World Health Organization guidance suggests working the major muscle groups on at least two days a week, alongside regular aerobic activity.

Is walking enough exercise for older adults?

Walking counts towards aerobic activity targets and has real health benefits, but guidelines also recommend strength training at least twice a week, plus stretching and balance exercises.

When should I talk to a doctor about muscle loss?

If you feel you are losing strength, do not assume it is just ageing. A doctor can run some straightforward tests to check whether muscle loss is happening, and it is not always related to age.

This article is general information, not personalised medical or fitness advice. Talk to your GP, a physiotherapist or an accredited exercise physiologist before starting a new exercise program if you have a health condition or injury, are pregnant or haven’t been active for a while. In an emergency, call 000.