Health and Fitness
Exercise is an important part of nearly everyone’s everyday health. This is true for older adults, too.
Experts say adults should aim to be as active as possible. If you are an older adult, exercise can help you live a longer, healthier life.
When elderly people stay active, their brains have more of a class of proteins that enhances the connections between neurons to maintain healthy cognition, a UC San Francisco study has found.
It is safe for most adults older than 40 years of age to exercise. Even patients who have chronic illnesses can exercise safely. These include heart disease, high blood pressure, diabetes, and arthritis.
In fact, many of these conditions are improved with exercise. If you are not sure if exercise is safe for you or if you are currently inactive, ask your doctor.
There are many benefits of exercise to adult in their 40’s and above, not limited to older adults only but to all age grades.
- It improves your strength. This helps you stay independent.
- It improves your balance. This prevents falls.
- It gives you more energy.
- It prevents or delays diseases, such as heart disease, diabetes, or osteoporosis.
- It can improve your mood and fight off depression.
- It may improve cognitive function (how your brain works)
Hear What Health Experts Are Saying
This protective impact was found even in people whose brains at autopsy were riddled with toxic proteins associated with Alzheimer’s and other neurodegenerative diseases.
“Our work is the first that uses human data to show that synaptic protein regulation is related to physical activity and may drive the beneficial cognitive outcomes we see,” said Kaitlin Casaletto, PhD, an assistant professor of neurology and lead author on the study, which appears in the January 7 issue of Alzheimer’s & Dementia:
The Journal of the Alzheimer’s Association.
The beneficial effects of physical activity on cognition have been shown in mice but have been much harder to demonstrate in people.
Casaletto, a neuropsychologist and member of the Weill Institute for Neurosciences, worked with William Honer, MD, a professor of psychiatry at the University of British Columbia and senior author of the study, to leverage data from the Memory and Aging Project at Rush University in Chicago.
That project tracked the late-life physical activity of elderly participants, who also agreed to donate their brains when they died.
“Maintaining the integrity of these connections between neurons may be vital to fending off dementia, since the synapse is really the site where cognition happens,” Casaletto said. “Physical activity — a readily available tool — may help boost this synaptic functioning.”
More Proteins Mean Better Nerve Signals
Honer and Casaletto found that elderly people who remained active had higher levels of proteins that facilitate the exchange of information between neurons.
This result dovetailed with Honer’s earlier finding that people who had more of these proteins in their brains when they died were better able to maintain their cognition late in life.
To their surprise, Honer said, the researchers found that the effects ranged beyond the hippocampus, the brain’s seat of memory, to encompass other brain regions associated with cognitive function.
“It may be that physical activity exerts a global sustaining effect, supporting and stimulating healthy function of proteins that facilitate synaptic transmission throughout the brain,” Honer said.
Synapses Safeguard Brains Showing Signs of Dementia
The brains of most older adults accumulate amyloid and tau, toxic proteins that are the hallmarks of Alzheimer’s disease pathology. Many scientists believe amyloid accumulates first, then tau, causing synapses and neurons to fall apart.
Casaletto previously found that synaptic integrity, whether measured in the spinal fluid of living adults or the brain tissue of autopsied adults, appeared to dampen the relationship between amyloid and tau, and between tau and neurodegeneration.
“In older adults with higher levels of the proteins associated with synaptic integrity, this cascade of neurotoxicity that leads to Alzheimer’s disease appears to be attenuated,” she said. “Taken together, these two studies show the potential importance of maintaining synaptic health to support the brain against Alzheimer’s disease.” (Source; Sciencedaily.com)
