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Nutrition et vieillissement

Sarcopenia Prevention

Strategies to prevent age-related muscle loss through nutrition and exercise.

Definition

A nutritional and exercise strategy to prevent age-related muscle loss, characterized by progressive decline in muscle mass, strength, and function starting around age 30. Effective prevention requires adequate protein intake, resistance training, and optimized nutrient status.

How it works

Sarcopenia represents an accelerated loss of skeletal muscle mass and strength that becomes more pronounced after age 65, significantly impacting mobility, independence, and fall risk. Protein synthesis becomes less efficient with age, requiring higher protein intake and better distribution throughout the day to stimulate muscle protein synthesis. Resistance exercise remains the most effective intervention, but must be combined with adequate protein, vitamin D, and antioxidants to maximize muscle preservation. Nutritional deficiencies in key micronutrients like B vitamins, iron, and zinc further accelerate muscle loss. Early intervention in midlife can substantially reduce sarcopenia risk and maintain functional capacity.

Role

Preserves muscle mass, strength, and functional mobility essential for independence and fall prevention in aging.

Examples

  • Whey protein
  • Creatine monohydrate
  • Leucine
  • Vitamin D
  • Resistance training

Recommendations

Aim for 1.2-1.6 grams of protein per kilogram of body weight daily, distributed evenly across meals (25-30g per meal). Combine resistance training 2-3 times weekly with cardiovascular activity and ensure adequate vitamin D status (1000-2000 IU daily). Include foods rich in leucine such as dairy, eggs, and legumes.

Key takeaway

Adequate protein intake combined with resistance exercise is the cornerstone of sarcopenia prevention.

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