‘Muscle mass loss may raise dementia risk’

Emerging research underscores the significant link between low muscle mass and an elevated risk of cognitive decline, including dementia, in older adults. Studies conducted by institutions such as McGill University and findings published in JAMA Network Open reveal that individuals with reduced muscle mass experience accelerated cognitive decline, particularly in executive functions like decision-making and attention​.
Key findings:
Independent risk factor: Low muscle mass impacts cognitive health independently of physical activity levels and muscle strength. This highlights the critical role of maintaining muscle mass, beyond just staying active.
Mechanisms at play: Muscles are vital for overall health, acting as protein reservoirs and producing molecules that interact with the brain. Exercise, especially resistance training, boosts brain health by enhancing blood flow and supporting cognitive functions​.
Modifiable risk: Unlike some dementia risk factors, muscle mass is modifiable. Regular resistance exercises and adequate protein intake can help sustain or increase muscle mass, potentially delaying or preventing cognitive decline.
Recent data: Using data from the Canadian Longitudinal Study on Aging, researchers observed that individuals with low muscle mass faced significant deterioration in executive functions over three years, while memory and psychomotor skills remained less affected​.
Implications for public health:
The studies suggest that routine assessment of muscle mass in clinical settings could help identify at-risk individuals earlier. Furthermore, integrating strength training and nutrition plans into older adults’ healthcare routines may serve as preventive strategies against dementia.
This growing body of evidence calls for heightened awareness and practical interventions to address muscle loss as a key factor in cognitive health.