Biological research into aging and longevity

Scientific research into the biological mechanisms of aging has focused on cellular adaptations and the identification of biomarkers for longevity.

Initial findings from the University of Copenhagen identified a molecular mechanism in muscle aging involving cardiolipin, a lipid essential for mitochondrial stability. This process involves muscles shifting toward a slower, fatigue-resistant fiber configuration to mitigate oxidative damage. While muscle aging is a biological reality, studies indicate that resistance training can significantly increase muscular strength in individuals aged 75 and older, even without substantial increases in muscle mass.

Subsequent research has expanded to include cellular senescence, where cells remain metabolically active but stop dividing, releasing inflammatory molecules that contribute to age-related diseases. To improve the development of anti-aging therapies, scientists are investigating myosteatosis—the infiltration of fat into skeletal muscle—as a biomarker of biological age and metabolic decline. Establishing such biomarkers is viewed as essential for assessing the effectiveness of medical interventions.