Which of the following is NOT a potential benefit from exercise that can be seen in the brain and mental health?

Increased levels of anxiety is not a potential benefit from exercise related to brain health and mental well-being. Engaging in regular physical activity has been widely shown to have positive effects on mental health by decreasing levels of anxiety, rather than increasing them. Exercise promotes the release of endorphins, often referred to as "feel-good" hormones, which can help alleviate feelings of tension and anxiety.

Improved mood regulation, enhanced cognitive function, and reduced stress levels are all well-established benefits associated with regular physical activity. Exercise helps in regulating neurotransmitters, improving blood flow to the brain, and reducing the physiological markers of stress, which collectively contribute to better mental health outcomes. Therefore, the presence of increased anxiety as an option highlights a misunderstanding of how exercise generally affects mental health.