Cognitive function and cognitive reserve are two terms that are often used interchangeably. However, cognitive function is a more specific term than cognitive reserve. Cognitive function refers to the brain's ability to process information, whereas cognitive reserve refers to the brain's ability to adapt to damage from degenerative diseases and other stressors.

The brain is a complex organ that relies on neural connections for communication and coordination between different parts of the body. As people age, these connections deteriorate over time because of factors such as lack of physical activity, poor diet, sleep habits, exposure to toxins, and chronic illness. When this occurs, it can affect how your brain functions and how well you perform daily tasks like walking or talking.
When you're physically active, your brain receives more oxygen-rich blood flow which helps improve its overall health by reducing inflammation in the brain. This can also help protect against dementia by encouraging new neuron growth.

Even if you don't have any symptoms of dementia right now, there are plenty of other ways that physical activity can benefit your mind as you get older!