Department of Kinesiology and Community Health, University of Illinois, Urbana, IL 61801, USA.
Department of Psychology, Eastern Illinois University, Charleston, IL 61920, USA.
Int J Psychophysiol. 2022 Dec;182:200-210. doi: 10.1016/j.ijpsycho.2022.10.013. Epub 2022 Oct 28.
Previous work has demonstrated that physical activity and weight status are associated with attentional inhibition (indexed with the P3 component of event-related potentials). However, there is limited knowledge on the neural underpinnings of motor response planning and activation. This study investigated the effect of weight status on relationships between moderate-to-vigorous physical activity (MVPA) and the lateralized readiness potential (LRP), a neuroelectric index of motor response planning and activation. Adults (N = 165 [98 females]) wore ActiGraph wGT3X+ accelerometers to measure physical activity. Behavioral outcomes were recorded during the modified Eriksen Flanker task to assess attentional inhibition. EEG recordings were taken to elucidate response- (LRP-R) and stimulus-locked (LRP-S) LRPs, and P3. Participants were separated into groups based on the BMI cutoff of 30 kg/m (i.e., non-obese [n = 88], obese [n = 77]). Independent t-tests and ANCOVA were conducted to determine differences between groups. Regression analyses within each group were conducted to determine relationships between MVPA and LRP and P3 amplitude and latencies. There was no difference in MVPA between weight groups after adjustment for age and sex, although the non-obese group had significantly higher incongruent accuracy (p = 0.007). Only in the obese group, MVPA was positively associated with LRP-R incongruent (β = 0.014, p = 0.029) and LRP-S congruent (β = 0.013, p = 0.008) amplitude, and inversely associated with LRP-S incongruent (β = -0.488, p = 0.017) and P3 congruent (β = 0.013, p = 0.008) fractional area latency. MVPA was associated with pre-motor planning and activation only among persons with obesity. Future work should study the impact of physical activity on neuroelectric indices of motor responses in people with obesity.
先前的工作表明，体力活动和体重状况与注意力抑制（以事件相关电位的 P3 成分来衡量）有关。然而，对于运动反应规划和激活的神经基础知之甚少。本研究调查了体重状况对中等至剧烈体力活动（MVPA）与侧化准备电位（LRP）之间关系的影响，LRP 是运动反应规划和激活的神经电指标。成年人（N=165[98 名女性]）佩戴 ActiGraph wGT3X+加速度计来测量体力活动。在修改后的 Eriksen 侧翼任务中记录行为结果，以评估注意力抑制。进行 EEG 记录以阐明反应（LRP-R）和刺激锁定（LRP-S）LRP 以及 P3。参与者根据 BMI 截止值 30kg/m（即非肥胖[ n=88]，肥胖[ n=77]）分组。进行独立 t 检验和协方差分析以确定组间差异。在每个组内进行回归分析，以确定 MVPA 与 LRP 和 P3 幅度和潜伏期之间的关系。在调整年龄和性别后，体重组之间的 MVPA 没有差异，尽管非肥胖组的不一致准确性显着更高（p=0.007）。仅在肥胖组中，MVPA 与 LRP-R 不一致呈正相关（β=0.014，p=0.029）和 LRP-S 一致（β=0.013，p=0.008）幅度，与 LRP-S 不一致呈负相关（β=-0.488，p=0.017）和 P3 一致（β=0.013，p=0.008）分数区域潜伏期。MVPA 仅与肥胖者的运动前规划和激活有关。未来的工作应该研究体力活动对肥胖人群运动反应的神经电指标的影响。
