Narimani Mohammad, Esmaeilzadeh Samad, Pesola Arto J, Azevedo Liane B, Moradi Akbar, Heidari Behrouz, Kashfi-Moghadam Malahat
Department of Psychology, University of Mohaghegh Ardabili, Ardabil, Iran.
University of Mohaghegh Ardabili, Ardabil, Iran.
Eat Weight Disord. 2019 Dec;24(6):1051-1061. doi: 10.1007/s40519-019-00752-2. Epub 2019 Jul 17.
The association between weight status with simple cognitive tasks such as reaction time (RT) may not be observed in young people as cognitive functioning development has reached its peak. In the present study, we aimed to examine the association between overall and central adiposity with overall and central processing of RT in a sample of young adult men with different weight status from Ardabil, Iran.
Eighty-six young males between June-July 2018 completed RT tests as well as premotor time (PMT) using surface electromyography changes in isometric contraction response to an audio stimulus.
No significant associations were observed between RT and PMT and different body mass index categories (underweight, normal weight, overweight and obese), as well as fat mass and fat to skeletal muscle mass ratio quartiles (Q). However, participants with greater waist to height ratio (WHtR) had longer PMT (but not RT) than their peers with lower WHtR (Q3 than Q2 and Q1 groups; p < 0.05, d = 1.23). Participants in the skeletal muscle mass quartile Q2 tended to have longer RT than participants in Q3 in an adjusted comparison model (p = 0.05, d = 0.72).
Although the association between weight status and RT might be elusive in young adults, our results show that higher central adiposity is negatively associated with PMT in young adults. Longitudinal studies are needed to explore the changes in obesity indexes and process speed in longer terms.
Level I, experimental study.
在年轻人中，由于认知功能发育已达到顶峰，可能无法观察到体重状况与简单认知任务（如反应时间，RT）之间的关联。在本研究中，我们旨在调查伊朗阿尔达比勒不同体重状况的年轻成年男性样本中，总体肥胖和中心性肥胖与RT的总体及中枢处理之间的关联。
2018年6月至7月期间，86名年轻男性完成了RT测试以及使用表面肌电图测量等长收缩对音频刺激反应变化的运动前时间（PMT）测试。
未观察到RT和PMT与不同体重指数类别（体重过轻、正常体重、超重和肥胖）以及脂肪量和脂肪与骨骼肌量比值四分位数（Q）之间存在显著关联。然而，腰高比（WHtR）较高的参与者比腰高比低的同龄人具有更长的PMT（但RT无差异）（Q3组比Q2和Q1组；p<0.05，d=1.23）。在调整后的比较模型中，骨骼肌量四分位数Q2的参与者的RT往往比Q3的参与者更长（p=0.05，d=0.72）。
尽管在年轻人中体重状况与RT之间的关联可能难以捉摸，但我们的结果表明，较高的中心性肥胖与年轻人的PMT呈负相关。需要进行纵向研究以长期探索肥胖指数和处理速度的变化。
I级，实验研究。
