| Summary: | 博士 === 國立體育大學 === 競技與教練科學研究所 === 106 === This study aims to investigate the difference of executive functions between a young population suffering from obesity and a normal population, in relation to task-switching, regarding both behavioral performances and electrophysiological activation. 140 young adults aged 18-25 years that met the criteria for body mass index (BMI) and predictability of the maximal oxygen uptake (VO2max) were recruited. Participants were categorized into four groups: 35 obese with high cardiorespiratory fitness (OH), 35 obese with low cardiorespiratory fitness (OL), 35 normal-weight with high cardiorespiratory fitness (NH), and 35 weight-weight with low cardiorespiratory fitness (NL). The N1 and P3 event-related potential (ERP) components were recorded while the groups were performing the task-switching task. The indices of the task-switching task included the global switch (i.e., heterogeneous and homogeneous block) and the local switch (i.e., switch and non-switch trials). Behavioral results revealed that NH group had superior performance on the global switch compared to the OH, NL and OL groups. Regarding to the local switch, NH group had superior performance compared to the OH, NL and OL groups. Finally, OH group had superior local switch performance than the OL group did. Analyses of ERP components further revealed that NH had larger mean P3 amplitudes during both the global and local switch, compared to the other three groups. Finally, larger N1 amplitude was observed in the NH group during the local switch compared to the OH group. These data suggested that individuals with normal-weight and high cardiorespiratory fitness demonstrated better cognitive functioning, and attentional resource allocation. Furthermore, among those obese individuals, cardiorespiratory fitness might selectively benefit the executive function, as represented by the superior performance in the local switch observed in the OH than in the OL.
|
|---|
