Sarcopenia: What It Is and How to Prevent It

Sarcopenia is a medical term that means the loss of muscle mass, strength, and function due to aging. It is a common and serious condition that affects millions of older adults around the world. Sarcopenia can reduce your quality of life, increase your risk of falls, fractures, disability, and death, and make you more vulnerable to other diseases. In this blog post, I will explain what causes sarcopenia, how to diagnose it, and how to prevent or treat it.

What causes sarcopenia?

Sarcopenia is not an inevitable consequence of aging, but rather a result of multiple factors that interact with each other. Some of the main causes of sarcopenia are:

  • Physical inactivity: Lack of exercise or physical activity is the most common and modifiable risk factor for sarcopenia. When you don’t use your muscles, they shrink and weaken over time. This can also affect your balance, coordination, and posture.
  • Poor nutrition: Not eating enough calories and protein can lead to muscle loss, especially if you have a chronic disease or infection. Protein is essential for building and maintaining muscle tissue, and older adults may need more protein than younger ones to prevent sarcopenia.
  • Hormonal changes: As you age, your body produces less of certain hormones that are important for muscle growth and maintenance, such as testosterone, growth hormone, and insulin-like growth factor-1 (IGF-1). These hormones can also be affected by other conditions, such as obesity, diabetes, and hypothyroidism.
  • Inflammation: Chronic inflammation is a common feature of aging and many diseases, such as arthritis, cancer, and cardiovascular disease. Inflammation can damage your muscle cells and interfere with their repair and regeneration. It can also increase the production of molecules that break down muscle proteins, such as cytokines and cortisol.
  • Genetic factors: Some people may have a genetic predisposition to sarcopenia, due to variations in their genes that affect their muscle size, strength, and response to exercise and nutrition. However, genetic factors alone cannot explain sarcopenia, and environmental factors play a bigger role.

How is sarcopenia diagnosed?

There is no single test or criterion to diagnose sarcopenia, but rather a combination of methods that measure different aspects of muscle health. Some of the common methods are:

  • Muscle mass: This is the amount of muscle tissue in your body, usually measured by bioelectrical impedance analysis (BIA), dual-energy X-ray absorptiometry (DXA), or magnetic resonance imaging (MRI). A low muscle mass relative to your height or weight can indicate sarcopenia.
  • Muscle strength: This is the amount of force your muscles can produce, usually measured by handgrip strength or leg extension strength. A low muscle strength can indicate sarcopenia and predict your risk of falls and disability.
  • Physical performance: This is the ability to perform daily activities that require muscle power, such as walking, climbing stairs, or getting up from a chair. A low physical performance can indicate sarcopenia and affect your independence and quality of life.

How can you prevent or treat sarcopenia?

The good news is that sarcopenia is not irreversible, and you can prevent or slow down its progression by making some lifestyle changes. The two main strategies to prevent or treat sarcopenia are:

  • Exercise: Exercise is the most effective and proven way to combat sarcopenia. It can increase your muscle mass, strength, and function, as well as improve your balance, coordination, and posture. The best type of exercise for sarcopenia is resistance training, which involves lifting weights or using elastic bands or machines that create resistance. Resistance training can stimulate your muscle fibers, increase your protein synthesis, and boost your hormone levels. You should aim to do resistance training at least two to three times a week, targeting all major muscle groups, and gradually increasing the intensity and duration. You can also combine resistance training with aerobic exercise, such as walking, cycling, or swimming, which can improve your cardiovascular health and endurance. You should consult your doctor or a physical therapist before starting any exercise program, and get guidance on how to perform the exercises safely and effectively.
  • Nutrition: Nutrition is another key factor for preventing or treating sarcopenia. You should eat enough calories and protein to support your muscle health and prevent muscle loss. Protein is especially important for older adults, as they may need more protein than younger ones to prevent sarcopenia. The recommended protein intake for older adults is 1.2 to 1.5 grams per kilogram of body weight per day, or about 25 to 30 grams of protein per meal. You should choose high-quality protein sources, such as lean meat, poultry, fish, eggs, dairy, soy, nuts, and seeds. You should also eat a balanced diet that includes fruits, vegetables, whole grains, healthy fats, and fluids. You may also benefit from taking certain supplements, such as vitamin D, omega-3 fatty acids, creatine, or whey protein, but you should consult your doctor before taking any supplements.


Sarcopenia is a serious condition that affects many older adults and can have a negative impact on their health and well-being. However, sarcopenia is not inevitable, and you can prevent or treat it by staying physically active and eating a healthy diet. By doing so, you can preserve your muscle mass, strength, and function, and improve your quality of life as you age. I hope you found this blog post helpful and informative. If you have any questions or comments, please feel free to leave them below. Thank you for reading and stay healthy!

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