Main causes and risk factors
1. Aging-related changes
- The body naturally builds and maintains muscle less efficiently with age.
- Hormonal changes (such as lower levels of growth-related hormones and sex hormones) can affect muscle maintenance.
- Muscle fibers may decrease in number and size.
2. Lack of physical activity
- Long periods of sitting or bed rest accelerate muscle loss.
- Not using muscles regularly signals the body that less muscle is needed.
3. Inadequate protein intake
- Older adults may need enough high-quality protein to support muscle repair.
- Poor appetite, dental problems, or difficulty preparing meals can contribute to low intake.
4. Chronic health conditions
Conditions that can contribute include:
- Long-term inflammation
- Heart, lung, kidney, or liver disease
- Cancer and other serious illnesses
- Some medications or prolonged hospital stays
5. Vitamin and nutrient deficiencies
Low levels of certain nutrients, especially vitamin D, may be associated with weaker muscles in some people.
Ways to help prevent or slow sarcopenia
1. Strength training (most important)
Resistance exercise is one of the most effective approaches:
- Weight training
- Resistance bands
- Bodyweight exercises (such as squats or wall push-ups)
- Supervised exercise programs when needed
Aim for regular sessions appropriate to your fitness level.
2. Eat enough protein
Good protein sources include:
- Eggs
- Fish
- Poultry
- Dairy products
- Beans and lentils
- Tofu and other soy foods
A healthcare professional or dietitian can help determine the right amount, especially for people with kidney disease or other medical conditions.
3. Stay physically active
- Walking, balance exercises, and daily movement help maintain function.
- Combining aerobic activity with strength training is often beneficial.
4. Support bone and muscle health
- Ensure adequate vitamin D and calcium intake when appropriate.
- Get regular sunlight exposure where safe and practical.
- Address sleep problems and chronic stress.
5. Check for contributing medical issues
If muscle weakness, frequent falls, unexplained weight loss, or difficulty with everyday tasks develops, a medical evaluation can help identify treatable causes.
Key point: Muscle loss with aging is common, but significant sarcopenia is not something people simply have to accept. Regular resistance exercise, adequate nutrition, and addressing health conditions can make a meaningful difference.
