There is a condition affecting the majority of adults over 60, contributing significantly to falls, fractures, diabetes, cardiovascular disease, cognitive decline, and premature death. It has a name, sarcopenia, and almost nobody talks about it.
More importantly, it is largely preventable and partially reversible. Yet it is barely addressed in routine clinical care.
What is sarcopenia?
Sarcopenia is the progressive, age-related loss of skeletal muscle mass, strength, and function. The term comes from the Greek sarx meaning flesh and penia meaning poverty. Literally, poverty of flesh.
It is not just about looking less muscular. Skeletal muscle is the largest organ in the body by mass. It is the primary site of glucose disposal, a major driver of metabolic rate, and a critical component of every movement you make. When muscle is lost, the consequences extend far beyond physical weakness.
How common is it?
Very. Adults begin losing skeletal muscle mass from approximately their mid-30s, at a rate of 3 to 8% per decade. After the age of 60, that rate approximately doubles. By age 80, many people have lost 30 to 40% of the muscle mass they had at their peak.
Conservative estimates suggest sarcopenia affects 10 to 20% of adults over 60. In older adults in aged care facilities, the prevalence exceeds 50%.
In Australia, where the population over 65 is projected to reach 8 million by 2058, this is not a niche clinical problem. It is a public health crisis that receives a fraction of the attention given to conditions it directly causes.
Why does sarcopenia happen?
Several factors drive age-related muscle loss.
Hormonal changes. Declining levels of testosterone, oestrogen, growth hormone, and IGF-1 reduce the anabolic signals that drive muscle protein synthesis. This is not a disease. It is a normal part of ageing. But its effects are modifiable.
Reduced physical activity. Many adults become less active as they age, often gradually and without noticing. Less loading means less stimulus for muscle maintenance. Muscle is metabolically expensive tissue and the body only maintains what it needs to use.
Impaired protein synthesis. Older adults have a blunted muscle protein synthetic response to both exercise and dietary protein, called anabolic resistance. This means that older adults need more dietary protein and more resistance exercise stimulus to achieve the same muscle maintenance effect as younger adults.
Chronic low-grade inflammation. Ageing is associated with a state of chronic low-grade inflammation, sometimes called inflammaging, that promotes muscle breakdown. This is worsened by conditions like obesity, diabetes, and cardiovascular disease, which are more common in older adults.
Inadequate dietary protein. Many older adults eat less total protein than they need for muscle maintenance, partly due to reduced appetite, partly due to outdated dietary advice, and partly because protein requirements genuinely increase with age.
What are the consequences?
The consequences of sarcopenia extend across almost every dimension of health.
Falls and fractures. Muscle weakness is the leading modifiable risk factor for falls in older adults. Falls are the leading cause of injury-related death in Australians over 65. Every 1% reduction in muscle strength is associated with a 3% increase in falls risk.
Metabolic disease. Skeletal muscle is responsible for approximately 75 to 85% of insulin-stimulated glucose uptake. Less muscle mass means less capacity to clear glucose from the bloodstream, a direct driver of insulin resistance and Type 2 diabetes. Sarcopenia and Type 2 diabetes are bidirectionally related.
Cardiovascular disease. Muscle mass is independently associated with cardiovascular risk. The mechanisms are multiple including reduced glucose disposal, chronic inflammation, and reduced functional capacity limiting physical activity. But the association is consistent across large population studies.
Cognitive decline. The relationship between muscle mass, physical function, and cognitive health is increasingly well supported. Physical activity and resistance training have direct neuroprotective effects. Sarcopenia is associated with higher rates of cognitive decline and dementia.
Frailty and loss of independence. Frailty, a state of reduced physiological reserve and increased vulnerability to adverse outcomes, is strongly driven by sarcopenia. Frail older adults are at dramatically higher risk of hospitalisation, institutionalisation, surgical complications, and death following health events that healthier adults would recover from.
Mortality. Muscle mass and grip strength are among the strongest predictors of longevity across large population studies, more predictive of all-cause mortality than many conventional biomarkers. Low muscle mass is not just a symptom of poor health. It is independently driving poor health outcomes.
What can be done about it?
The good news is that sarcopenia is not inevitable and not irreversible. Two interventions have strong evidence.
Progressive resistance training is the most powerful stimulus for muscle protein synthesis at any age. Studies consistently show that older adults including those in their 70s, 80s, and even 90s can increase muscle mass and strength with appropriately prescribed resistance training. The prescription needs to be progressive, increasing load over time, sufficient in volume, and specific to the individual’s current capacity and health status.
This is not light weights for many repetitions. Research shows that high repetition, low-load training in older adults produces inferior muscle hypertrophy compared to moderate-to-high loads. The program needs to be genuinely progressive and challenging within appropriate limits for the individual.
Adequate dietary protein is the other essential component. Current evidence supports protein intakes of 1.2 to 1.6 grams per kilogram of body weight per day for older adults, substantially higher than the general population recommendation of 0.8g/kg/day. Protein distribution also matters. Spreading intake across meals rather than consuming most protein in one sitting produces better muscle protein synthesis.
For older adults with diabetes, kidney disease, or other conditions that affect dietary requirements, protein intake needs to be calibrated against other clinical considerations. This is where the integrated team at Beachside EP, Exercise Physiology and Dietetics working together, is particularly valuable.
The clinical case for acting early
Sarcopenia is most effectively addressed before it becomes severe. Prevention is dramatically easier than reversal. An older adult in their mid-50s who begins a structured resistance training program is in a fundamentally different position a decade later than one who begins in their late 60s with significant existing muscle loss.
The window of greatest opportunity is roughly 50 to 65, a period when many people are still physiologically capable of making substantial gains, but when natural muscle loss is already underway and accelerating.
If you are over 50 and not doing structured progressive resistance training, this is the single most important thing you can add to your health routine. Not for aesthetics. Not for gym culture. For your metabolic health, your fracture risk, your independence at 80, and your longevity.
What does an Exercise Physiology program for sarcopenia look like?
At Beachside EP, we assess your current muscle mass, strength, and functional capacity. We design a progressive resistance training program appropriate for your health status, comorbidities, and starting point. We track your progress in objective measures, not just how you feel. And we integrate dietary guidance through our Dietitian where protein optimisation is part of the plan.
Sessions are conducted in our private clinical gym in Mordialloc, or via telehealth for review appointments and home program management.
Medicare CDM plans apply if you have a qualifying chronic condition. Private health insurance extras cover Exercise Physiology. And if you are funding privately, no referral is needed and you can book directly.
Learn more about healthy ageing Exercise Physiology at Beachside EP