(Image credit: Jesse Wild)

The good news is that regular, vigorous endurance exercise such as cycling can help to slow down many of the negative physiological changes that occur due to aging, as well as reduce the risk of a number of degenerative diseases such as coronary heart disease and some types of cancers.

The bad news, however, is that the human brain can also undergo deterioration in later life, leading to conditions such as dementia.

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