How does regular exercise benefit the nervous system?

• A. It increases the risk of injury
• B. It promotes better mental health
• C. It has no effect on the nervous system
• D. It decreases reaction times

Answer: (B)

Regular exercise significantly benefits the nervous system by promoting better mental health. Engaging in physical activity stimulates the release of various neurotransmitters, such as endorphins, serotonin, and dopamine, which are essential for mood regulation. This biochemical response can lead to reduced feelings of anxiety, depression, and stress, contributing to an overall improvement in mental well-being.

Additionally, exercise has been shown to enhance cognitive functions, including memory, attention, and problem-solving skills, by promoting neurogenesis—the creation of new neurons—especially in regions like the hippocampus. Furthermore, regular physical activity can improve sleep quality and decrease fatigue, leading to better emotional resilience and cognitive performance.

The other choices identify outcomes that do not align with the well-documented benefits of exercise. While increased injury risk may occur in certain situations, it is not a primary benefit of exercise. Furthermore, asserting that exercise has no effect on the nervous system overlooks the substantial evidence highlighting its positive impacts. Lastly, regular exercise does not decrease reaction times; in fact, it typically enhances them, leading to better physical coordination and response capacity.