Sarcopenia is the age-related loss of skeletal muscle mass, muscle strength, and physical performance. It becomes more common with increasing age, but it can also occur earlier because of inactivity, inadequate nutrition, chronic diseases, or prolonged hospitalization.
Practical explanation of sarcopenia in older adults, including how to recognize it, test for it, exercise safely, and understand the relationship with diabetes.
1. Sarcopenia and ageing
As we age, muscle tissue tends to decline, but substantial loss of strength is not something that simply has to be accepted as inevitable.
The important distinction is:
Muscle mass ↓ + muscle strength ↓ + physical performance ↓ → possible sarcopenia
Muscle strength is particularly important because it is closely related to independence, falls and ability to perform daily activities.
Warning signs
Look for:
- Difficulty getting up from a chair without using the arms
- Difficulty climbing stairs
- Walking more slowly than previously
- Difficulty carrying groceries or other objects
- Increasing difficulty with household activities
- Reduced balance
- Repeated falls
- Noticeable reduction in muscle size or strength
2. Simple tests that can be discussed with a doctor
A. Five-times chair-stand test
Sit in a normal chair and stand up and sit down five times, preferably under appropriate supervision if there is a fall risk.
A noticeably slow performance can indicate reduced lower-limb strength.
B. Hand-grip strength
A hand dynamometer can measure grip strength. This is one of the commonly used measures of muscle strength.
C. Walking speed
A clinician may measure how quickly you walk a specified distance.
D. Muscle-mass measurement
A DEXA/DXA scan or sometimes bioimpedance analysis can estimate skeletal muscle mass.
Importantly, one test alone does not establish sarcopenia. Clinicians generally combine strength, physical performance and muscle-mass measurements.
3. Exercise: the most important treatment
For sarcopenia, simply walking is useful for general health, but resistance/strength training is particularly important.
A typical program might include:
| Exercise | Main muscles |
|---|---|
| Sit-to-stand | Thighs, hips |
| Supported squat | Legs, hips |
| Heel raises | Calves |
| Step-ups | Legs, hips |
| Resistance-band row | Back, arms |
| Wall push-up | Chest, shoulders, arms |
| Light shoulder press | Shoulders, arms |
A common approach is 2–3 strength-training sessions per week, with gradual progression.
Start conservatively
The goal isn't to exhaust yourself. Start with a resistance that allows controlled movement and good technique, then gradually increase the challenge.
If balance is poor, exercises such as squats and step-ups should initially be performed with appropriate support or supervision.
4. Protein and muscle
Adequate protein is important because muscle requires amino acids to repair and maintain itself.
Good protein sources include:
- Lentils
- Chickpeas
- Beans
- Soy/tofu
- Milk
- Yogurt/curd
- Eggs
- Fish
- Nuts and seeds
For older adults, many clinical nutrition guidelines use approximately 1.0–1.2 g of protein/kg body weight/day as a general target, with higher amounts sometimes considered during illness or malnutrition.
However, protein intake should be individualised if there is kidney disease or another medical condition.
It is also useful to spread protein across meals rather than consuming almost all of it in one meal.
5. Sarcopenia and diabetes
There is an important relationship between type 2 diabetes and muscle loss.
Diabetes can contribute to poorer muscle quality and reduced physical performance through metabolic abnormalities, inflammation, reduced physical activity and other mechanisms. At the same time, having less healthy muscle can make glucose regulation more difficult because skeletal muscle is a major site for glucose disposal.
This can create a cycle:
Diabetes/metabolic problems → poorer muscle function → reduced activity → further loss of muscle function → poorer glucose control
Breaking that cycle with appropriate resistance exercise, adequate nutrition and good diabetes management can be very beneficial.
6. Sarcopenia is different from simply losing weight
This is important.
Someone can lose weight but still have relatively poor muscle strength.
Conversely, someone can have a relatively high body weight while having inadequate muscle mass and strength.
Therefore:
Don't use body weight alone to determine whether someone has sarcopenia.
Strength and physical function are much more informative.
7. Vitamin D and other nutritional factors
Doctors may consider nutritional contributors when evaluating muscle weakness, including:
- Vitamin D
- Vitamin B12
- Iron status where appropriate
- Adequate total calories
- Adequate protein
But supplements should not automatically be taken simply because sarcopenia is suspected. Testing and individualised advice are preferable.
8. A practical weekly structure
A reasonable general framework for an older adult is:
Monday – Strength
- Sit-to-stand
- Supported squat
- Heel raises
- Wall push-ups
- Resistance-band row
Tuesday – Walking / light activity
Wednesday – Strength
Thursday – Walking / balance activities
Friday – Strength
Saturday – Light activity
Sunday – Recovery
The exact exercises and intensity should be adapted to the person's strength, balance, joint problems and other medical conditions.
9. When medical assessment is particularly important
Seek professional assessment if there is:
- Rapid or unexplained muscle loss
- Repeated falls
- Significant weakness
- Difficulty walking
- Difficulty getting out of a chair
- Unexplained weight loss
- Persistent fatigue
- New difficulty performing normal daily activities
A doctor or physiotherapist can assess strength and function and determine whether the problem is actually sarcopenia or another cause of weakness.
One important distinction
Sarcopenia ≠ diabetic neuropathy.
Neuropathy can affect sensation, balance and muscle function, while sarcopenia primarily concerns muscle strength, muscle quantity/quality and physical performance. They can occur together, and when they do, fall risk and mobility problems can be greater.
