How to Prevent Muscle Loss with Age: A Sports Nutritionist’s Guide

By Barbara Lewin, RDN, LDN
Board-Certified Sports Nutritionist and Functional Dietitian

As we age, maintaining muscle mass becomes increasingly important for health, mobility, metabolism, and quality of life. Research suggests that healthy adults can lose up to 8% of their muscle mass per decade after age 30, with the rate of decline accelerating after age 60.

While some muscle loss is a natural part of aging, it is not inevitable. Nutrition, exercise, sleep, and lifestyle habits play a powerful role in preserving muscle and maintaining strength throughout life.

As a sports nutritionist, I often remind clients that building and preserving muscle isn’t just about athletic performance. Muscle is essential for healthy aging, reducing the risk of falls, supporting metabolism, maintaining independence, and improving overall quality of life.

Concerned About Losing Muscle as You Age?

Muscle loss isn’t just about appearance-it’s about maintaining strength, mobility, independence, and quality of life. If you’re over 40 and wondering whether you’re getting enough protein, building enough muscle, or fueling your body correctly, my Intro Nutrition Strategy Session can help.

During this one-on-one consultation, we’ll review your current eating habits, activity level, goals, and any nutrition challenges you’re facing. You’ll leave with practical recommendations tailored to your lifestyle and a clear plan to support healthy aging and muscle preservation.

Ready to take a proactive approach to aging well? Schedule your Intro Nutrition Strategy Session today. (Click here) 

What Is Age-Related Muscle Loss?

Age-related muscle loss, known as sarcopenia, refers to the gradual decline in muscle mass, strength, and physical function that occurs as we get older.

Several factors contribute to this process, including:

• Reduced physical activity
• Lower protein intake
• Hormonal changes
• Chronic inflammation
• Illness or injury
• Decreased muscle protein synthesis

The good news is that many of these factors are modifiable.

Why Muscle Matters More Than You Think

Most people focus on weight, but body composition is often a more meaningful measure of health.

Muscle tissue helps:

• Support metabolism
• Improve blood sugar regulation
• Enhance mobility and balance
• Reduce injury risk
• Maintain bone health
• Promote independence later in life

Losing muscle can make everyday activities more difficult and increase the risk of falls, frailty, and chronic disease.

Nutrition Strategy #1: Prioritize Protein at Every Meal

Protein provides the amino acids needed to build and repair muscle tissue.

Unfortunately, many adults consume most of their protein at dinner and very little at breakfast or lunch.

For optimal muscle maintenance, aim to include high-quality protein throughout the day.

Examples include:

• Eggs
• Greek yogurt
• Cottage cheese
• Fish
• Poultry
• Lean meats
• Tofu and tempeh
• Protein powders when needed

Most active adults benefit from spreading protein intake evenly across meals rather than consuming the majority in a single sitting.

Nutrition Strategy #2: Don’t Fear Carbohydrates

Carbohydrates provide the fuel needed to support resistance training and physical activity.

When carbohydrate intake is too low, training quality often suffers, making it more difficult to stimulate muscle growth and maintenance.

Choose primarily:

• Fruits
• Vegetables
• Whole grains
• Potatoes
• Sweet potatoes
• Beans and legumes

Strategic carbohydrate intake around exercise can help support performance and recovery.

Nutrition Strategy #3: Include Strength-Promoting Nutrients

Several nutrients support muscle function and healthy aging.

Vitamin D

Vitamin D plays an important role in muscle function and may help support strength, particularly in individuals with low levels.

Omega-3 Fatty Acids

Omega-3 fats may help support muscle protein synthesis and reduce inflammation.

Sources include:

• Salmon
• Sardines
• Trout
• Herring
• Fish oil supplements when appropriate

Magnesium

Magnesium is involved in muscle contraction, recovery, and energy production.

Good sources include:

• Nuts
• Seeds
• Legumes
• Whole grains
• Dark leafy greens

Nutrition Strategy #4: Stay Hydrated

Even mild dehydration can negatively impact physical performance and muscle function.

Many older adults experience a reduced sense of thirst, making hydration especially important.

Aim to drink fluids consistently throughout the day and increase intake during exercise and hot weather.

Nutrition Strategy #5: Consider Creatine

Creatine is one of the most researched supplements available and may help support strength, muscle mass, and exercise performance.

Emerging research suggests creatine may be particularly beneficial for older adults participating in resistance training programs.

As with any supplement, individualized guidance is recommended. For more information on this hot topic, check out Is Creatine Right For Me and Is Creatine Safe for Women.

The Missing Piece: Resistance Training

No nutrition plan can fully compensate for a lack of strength training.

Resistance exercise provides the stimulus that tells the body to maintain and build muscle tissue.

Effective options include:

• Free weights
• Resistance bands
• Weight machines
• Bodyweight exercises

For most adults, two to four strength-training sessions per week can significantly improve muscle health.

A Sports Nutritionist’s Perspective

One of the biggest myths I hear is that muscle loss is simply something we must accept as we age.

While aging does influence muscle mass, lifestyle habits have a tremendous impact on how much muscle we maintain throughout life.

The combination of adequate protein, strategic nutrition, resistance training, quality sleep, and consistent physical activity can help preserve strength, support metabolism, and improve long-term health.

Final Takeaway

Muscle loss with age may be common, but it is far from inevitable.

By prioritizing protein, maintaining an active lifestyle, engaging in regular strength training, and supporting recovery with proper nutrition, adults can preserve muscle, maintain independence, and continue enjoying an active life for years to come.

The earlier you begin investing in muscle health, the greater the benefits you’ll experience throughout the aging process.

Ready for Personalized Guidance?

Every person ages differently, and there is no one-size-fits-all nutrition plan for preserving muscle. Whether you’re looking to maintain strength, improve body composition, support healthy aging, or optimize athletic performance, individualized guidance can make all the difference.

Schedule an Intro Nutrition Strategy Session to receive personalized recommendations based on your goals, lifestyle, training program, and nutritional needs.