01/06/2026
MUSCLE'S ROLE IN HEALTH AND LONGEVITY
When people think about health, they often focus on the heart or brain, but muscle is just as critical. Muscle is a true longevity organ, influencing metabolism, blood sugar control, strength, and how well we age.
Muscle tissue is metabolically active. Unlike fat, which stores energy, muscle uses it, helping regulate blood sugar and insulin sensitivity. More muscle means a higher metabolic rate and better energy balance. This is why people with similar body weight can have very different metabolic health depending on their muscle mass.
As we age, we naturally lose muscle, a process called sarcopenia. This decline can begin in our 30s and accelerates after 50, contributing to slower metabolism, frailty, falls, and loss of independence. However, muscle loss is not inevitable. Regular strength training and adequate protein intake can preserve muscle well into older age.
Muscle also protects the body. It stabilizes joints, supports posture, reduces injury risk, and speeds recovery when injuries occur. Strong muscles help maintain balance, mobility, and independence—key factors in aging well.
In simple terms, fat is the body’s storage system, but muscle is the engine. It drives movement, burns energy, stabilizes blood sugar, and keeps the body resilient over time. Strength training isn’t just exercise; it’s a powerful longevity strategy.
Protein for Muscle and Healthy Aging
To build or maintain muscle, higher protein intake is essential. For most people, 0.8–1.2 grams of protein per pound of goal body weight (1.8–2.6 g/kg) supports muscle strength, metabolic health, and long-term vitality.
