As we age, the brain starts to change. By the age of 60, the frontal lobe and hippocampus, areas involved in cognitive function and encoding new memories, start to shrink, as does the white matter, the bundles of nerves that carry signals between brain cells.The brain also produces fewer chemical messengers, including the feel-good hormones dopamine and serotonin, which can hasten and cognitive decline. We’re also at growing risk of diseases of the brain, such as Alzheimer’s.However, regular exercise is beneficial because it seems to work at a cellular level to increase the number of mitochondria (power houses) in brain cells.
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