Exercise may Help Battle Depression in Seniors

Regular physical activity may help fight depression in seniors by stimulating muscle-generated mood boosters, finds a new study.

New study finds that physical activity may help combat depression in seniors by stimulating muscle-generated mood boosters. The findings of the study are published in the American Journal of Physiology-Cell Physiology.

The findings reveal that the underlying mechanisms which make us feel good when we exercise persist into old age and highlight the importance of staying active.

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‘Muscle loss is a common problem among elderly which may restrict that pathway and therefore raise the risk for depression. But, a new study finds that exercise can be used as a preventative strategy to help fight depression in seniors.’
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"A previous study demonstrated these mechanisms in healthy young adults. However, it was unknown whether the muscle deterioration which accompanies aging would preclude older adults from achieving similar exercise-induced benefits," explains David Allison, lead author on the study and a postdoctoral fellow in McMaster's Department of Kinesiology.

"This could have important implications concerning the use of exercise as a treatment or a preventative strategy for depression in seniors," he says.

Little is known about the relationship between skeletal muscle and mental health, or how exercise impacts this relationship.

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Earlier research has shown that physical activity may help to 'turn on' genes within skeletal muscle which can then influence the key metabolic pathways that ultimately promote mood-enhancing chemicals, such as serotonin, within the brain.

Muscle loss is a common problem in the elderly which may restrict that pathway and therefore increase the risk for depression, says Allison.

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For the study, a group of healthy men, aged 65 and over, followed a 12-week protocol of high-intensity interval training (HIIT) on a stationary bike once a week combined with bi-weekly strength training sessions. Researchers analyzed blood samples and changes to muscle and determined that three months of the exercise was enough to enhance gene expression within the skeletal muscle.

"Even individuals who are already metabolically healthy with good weight, good blood pressure and blood sugar levels need to prioritize regular physical activity to maintain or improve upon their mental health," says Allison. "We have shown such benefits are still achievable in old age and further emphasize the importance of maintaining an active lifestyle."