Muscle Loss and Aging: Mayo Clinic Expert Discusses Strategies, Therapies to Restore Muscle Health
Nov 15, 2013 - 11:19:40 AM
Video of Dr. LeBrasseur is available for download from the Mayo Clinic News Network.
What is the significance of muscle for overall health?
Dr. LeBrasseur: "We achieve peak muscle mass by our early 40s, and have a progressive deterioration from that point on, resulting in as much as a 50 percent loss by the time we are in our 80s or 90s. Most of us will lose approximately 30 percent over our lifetime. Muscle is a fundamental organ as we age, helping to maintain physical function, including the ability to walk, climb stairs, get out of a chair, or lift objects. These are things that determine our autonomy and independence as we age.
"Muscle is also critically important for metabolism in the context of type 2 diabetes, because it is the primary site where we store sugars and a primary determinant of our metabolic rate. It is also able to improve our resiliency to various stressors as we age, both physical and psychological, and as a result, fends off frailty. Interestingly, we and others are increasingly looking at muscle as an endocrine organ, and examining how it interacts with other organs, such as the brain. Therefore, by maintaining muscle health as we age, we can have a better overall quality of life."
What types of therapies are available to mitigate muscle loss?
Dr. LeBrasseur: "We are looking at promising therapies, including inhibiting the protein myostatin for those who require therapeutic intervention. Muscles naturally produce myostatin and its role is to prevent the growth of and cause the degradation of muscle. By administering a myostatin blocker, we and other researchers have demonstrated robust increases in muscle mass in mice and other animals. Our goal is to find ways to combine pharmacological and behavioral strategies to enhance muscle health to improve musculoskeletal function and metabolism, and reduce frailty as people age."
What can people do to maintain muscle as they age?
Dr. LeBrasseur: "Sixty percent of people over the age of 65 are insufficiently active or overtly inactive. Sitting is the new smoking. Physical activity remains the single best way most people can limit muscle loss as they age. Exercise may conjure images of young people in the gym, but what I'm recommending is that individuals remain physically active, including walking, gardening, and performing daily household tasks."
Dr. LeBrasseur directs the Muscle Performance and Physical Function Laboratory and the Healthy Aging and Independent Living Initiative at Mayo Clinic.
Mayo Clinic is the first and largest integrated, not-for-profit group practice in the world. Doctors from every medical specialty work together to care for patients, joined by common systems and a philosophy of "the needs of the patient come first." More than 3,700 physicians, scientists and researchers, and 50,100 allied health staff work at Mayo Clinic, which has campuses in Rochester, Minn; Jacksonville, Fla; and Scottsdale/Phoenix, Ariz.; and community-based providers in more than 70 locations in southern Minnesota., western Wisconsin and northeast Iowa. These locations treat more than half a million people each year. To obtain the latest news releases from Mayo Clinic, go to www.mayoclinic.org/news. For information about research and education, visitwww.mayo.edu.
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