Could Gym Time Help Maintain Brain Health in Old Age?
If you’re looking to stay healthy as you age, hitting the gym might be a wise choice. Recent research indicates that our body’s hidden characteristics could be crucial in keeping the brain youthful, and the potential impact is quite significant.
Dr. Silas Raji, a neuroimaging scientist and the lead author of this study, mentioned that “better brain health decreases the chances of developing future conditions like Alzheimer’s disease.”
To conduct this research, Raji and his team carried out whole-body MRI scans on 1,164 healthy adults, mostly around 55 years old. These advanced machines provided intricate details about muscle and brain tissue, along with two types of fat: the kind just under the skin and a more concealed visceral fat that surrounds organs in the abdomen.
Using AI, they assessed muscle and fat levels to estimate each individual’s “brain age.” A brain that appears older might suggest advanced aging, whereas a younger-looking brain could hint at better mental health.
This information can serve as a biomarker to help pinpoint individuals at risk of cognitive decline well before any signs appear, thus allowing for earlier intervention.
Through their analysis, the researchers found that the ratio of muscle to hidden belly fat significantly affects brain age.
Dr. Raji explained that while it’s well-known that aging often results in muscle loss and an increase in hidden belly fat, the study demonstrated that these health indicators are actually connected to how the brain ages.
Interestingly, individuals with more muscle tended to have younger-looking brains, whereas those with higher levels of hidden belly fat relative to muscle often had older-looking brains. Notably, fat just underneath the skin didn’t seem to correlate with brain aging.
Based on these findings, Raji recommended that anyone interested in bolstering their brain health should focus on building muscle and reducing visceral fat—goals which seem quite achievable.
He further commented that this study tested an established theory concerning the links between body composition markers and brain health, paving the way for these markers to be used in future trials exploring various metabolic treatments.
Among these potential treatments are GLP-1 medications like Ozempic and Wegovy, commonly prescribed for type 2 diabetes and obesity. These drugs work by mimicking natural hormones that help manage blood sugar and appetite, ultimately making you feel full for longer.
Recently, the use of GLP-1 has surged, with nearly 12% of Americans trying them to lose weight. While patients often see a drop of about 15% to 25% in body weight, they’re not just losing fat. Research indicates that nearly 40% of the weight loss attributed to GLP-1 could come from lean body mass, which includes muscle.
This can pose risks, like increased frailty and an unfavorable muscle-to-visceral fat ratio, potentially affecting brain age.
Raji suggested that these findings might inform future GLP-1 formulations aiming to target visceral fat specifically, hopefully with less impact on muscle mass.
“According to our research, focusing on reducing visceral fat while keeping muscle mass intact offers the most benefits for brain health and aging,” he stated. “Our study can help shape future treatments by facilitating assessments of body fat, muscle mass, and brain age through MRI, ultimately helping to refine dosing strategies of GLP-1 for optimal brain and body health.”
