| 英文摘要 |
Introduction: Majority of studies have supported the positive effects of acute exercise on cognitive function; however, the relationship between acute exercise and cognition may be modulated by type of cognitive function. Stoop test is a widely used neuropsychological test to assess different types of cognition. ERP, a neuroelectric index, provide covert brain processes during cognitive test administration. Brain-derived neurotropic factor (BDNF) is a neurotrophic factor which plays an important role for maintenance of neuron function. Animal studies have shown that exercise increase BDNF concentration; however, mechanisms underlying cognitive improvement in response to acute exercise remind unknown. Therefore, the purpose of the present study was to examine the effects of acute exercise on Stoop test performance and to explore the potential mechanisms underlying exercise-induced cognitive change using neuroelectric and biochemical approaches. Methods: Nineteen collegiate students participated in the study. Participants came to laboratory at the same time in two separate days for exercise and reading control conditions. The two experimental conditions were counterbalanced. Exercise condition consisted of 5-minute warm-up, 20-minute moderate intensity cycling (around 65 % HRR), and 5-minute cool-down. In reading control condition, participants read an exercise-related book for the same duration as exercise condition. Blood samples were obtained immediately following each experimental condition. Results: Shorter response time was found following acute exercise for both Stroop congruent and incongruent conditions compared to reading control condition. Additionally, greater beneficial effects of acute exercise were observed in incongruent condition compared to congruent condition. As for electrophysiological measures, greater P3 amplitude was found after acute exercise compared to reading control condition while changes in P3 latency and concentration of BDNF did not reach significance. Conclusion: acute moderate intensity exercise resulted in improvement in cognitive function. Importantly, more gained has been observed for executive function relative to information processing. Increased allocation of attentional resource may explain why acute exercise benefits cognitive performance. However, BDNF may not be the underlying mechanism for exercise-induced cognitive function improvement, at least for the current exercise protocol. Therefore, future research on exploring the role of other neurotrophic factors in acute exercise-cognition relationship is warranted. |
