How many pounds of lean muscle mass do Americans lose on average each decade of life?

The average individual loses approximately 6.6 pounds of lean muscle mass each decade as they age. This loss is part of a natural process known as sarcopenia, which typically begins in the third decade of life and accelerates with age, particularly after the age of 60. Maintaining muscle mass is crucial for overall health, influencing strength, metabolism, and functional capacity. Regular physical activity, particularly strength training, can help mitigate this muscle loss, emphasizing the importance of an active lifestyle as one ages.

Understanding the impact of age on muscle mass can also inform counseling practices related to nutrition and exercise, particularly for older populations who may be at higher risk of health complications due to diminished muscle mass.