Certified Personal Trainer (NSCA) Practice Exam

All of the following describe how exercise provides cognitive benefits EXCEPT:

1. Enhanced oxygen supply to the brain

2. Greater genetic variation

3. Improved neurotransmitter function

4. Heightened neural efficiency

The correct answer is: Greater genetic variation

Exercise is known to provide various cognitive benefits, and the correct answer highlights an option that does not align with the established physiological mechanisms through which exercise contributes to cognitive function. When engaging in physical activity, one major benefit is the enhanced oxygen supply to the brain. Exercise increases heart rate and improves circulation, leading to a greater delivery of oxygen and nutrients to brain tissue, which supports cognitive processes. Moreover, improved neurotransmitter function is a significant outcome of regular exercise. Physical activity boosts the production and sensitivity of neurotransmitters like serotonin and dopamine, which are essential for mood regulation and cognitive clarity. Additionally, heightened neural efficiency refers to the brain's improved ability to process information quickly and effectively. Exercise can lead to neuroplastic changes, helping to strengthen neural connections and optimize brain functions, which benefits learning and memory. In contrast, greater genetic variation does not directly relate to cognitive benefits derived from exercise. While genetic factors can influence individual responses to training and overall fitness, they do not inherently enhance the cognitive benefits attributed to physical activity. Hence, this option does not reflect a mechanism through which exercise impacts cognitive function.