Sarcopenia is the age-related loss of muscle mass, strength, and physical function. It becomes more common with aging, but it can also occur earlier due to inactivity, illness, poor nutrition, or certain medications. It increases the risk of falls, fractures, disability, and slower recovery from illness.
Common causes of sarcopenia
- Aging
- Muscle fibers gradually shrink and the body becomes less efficient at building and maintaining muscle.
- Hormonal changes (such as lower testosterone, estrogen, and growth hormone levels) can contribute.
- Physical inactivity
- Long periods of sitting, bed rest, or reduced activity accelerate muscle loss.
- Muscle responds to use; without resistance and movement, it declines.
- Low protein intake
- Older adults often need more protein to stimulate muscle repair.
- Poor appetite, dental problems, swallowing difficulties, or restrictive diets can reduce intake.
- Chronic diseases
Conditions linked with muscle loss include:- Diabetes
- Heart disease
- Chronic kidney or lung disease
- Cancer
- Inflammatory disorders
- Hormonal and metabolic changes
- Reduced muscle-building signals and increased inflammation can shift the body toward muscle breakdown.
- Certain medications or treatments
- Long-term use of some medicines (for example, high-dose corticosteroids) can contribute to muscle weakness.
Evidence-based ways to prevent or improve sarcopenia
1. Resistance training (most important)
- Strength exercises 2–4 times per week can help rebuild muscle and improve function.
- Examples:
- Squats or chair stands
- Resistance bands
- Weight machines
- Light dumbbells
- Push-ups (modified if needed)
2. Eat enough protein
Many older adults benefit from spreading protein across meals.
Protein-rich foods:
- Eggs
- Fish
- Chicken
- Dairy products (milk, yogurt, cottage cheese)
- Beans and lentils
- Tofu
- Nuts and seeds
A healthcare professional can help determine the right protein amount, especially for people with kidney disease.
3. Get enough vitamin D and nutrients
- Vitamin D deficiency is associated with muscle weakness.
- A balanced diet with adequate calories, minerals, and vitamins supports muscle health.
4. Stay active daily
- Walking, climbing stairs, balance exercises, and regular movement help preserve strength and independence.
5. Address medical causes
Treating underlying issues—such as thyroid problems, depression, poor nutrition, or chronic disease—can improve muscle function.
When to seek medical advice
Consider an evaluation if there is:
- Increasing difficulty getting up from a chair
- Frequent falls
- Noticeable muscle shrinking
- Trouble carrying groceries or climbing stairs
- Unintentional weight loss
A clinician can assess muscle strength, walking speed, and body composition to determine whether sarcopenia is present.
If you’d like, I can also provide a simple 7-day muscle-building plan for adults over 50 or 60 (exercise + protein targets).
