Brayton Seth H, Bosch Tyler A, Bantle Anne E, Hodges James S, Dengel Donald R, Chow Lisa S
Division of Diabetes, Endocrinology and Metabolism, Department of Medicine, University of Minnesota, MMC 101, 420 Delaware St. SE, Minneapolis, MN 55455, 612-624-5150,
Division of Biostatistics, School of Public Health, University of Minnesota University of Minnesota, Room 200 University Office Plaza, 2702A, 2221 University Ave SE, Minneapolis, MN 55414, 612-624-5150,
Cogent Med. 2018;5(1). Epub 2018 Aug 5.
Although physical activity ameliorates the metabolic impact of high body mass index (BMI), runners with BMI≥25 kg/m are relatively understudied.This study had two goals: 1) Identify differences in body composition, as measured by dual X-ray absorptiometry (DXA), between overweight (BMI≥25 kg/m) runners (OWR) and normal weight (BMI<25 kg/m) runners (NWR) and 2) Examine whether an 90 minute run alters total or regional fat mass, as measured by DXA, in OWR and NWR. We hypothesized that OWR would have higher total body fat than NWR and OWR with greater changes in visceral fat after a prolonged run.
Body composition analysis before and after a supervised run.
We recruited NWR (n=16,F:n=7,28.1±1.4 years, BMI 22.0±0.4 kg/m, results as mean±SE) and OWR (n=11,F:n=7,32.0±1.6 years, BMI 30.5±1.4kg/m) participants. DXA based body composition was measured before and after a supervised, 90 minute run at 60% heart rate reserve.
OWR had higher body fat than NWR in all measured regions.. Both groups did not significantly reduce fat mass at any measured fat depots after the running exposure.
OWR had higher body fat in all measured regions than NWR. DXA could not demonstrate any acute fat mass changes after a prolonged run.
尽管体育活动可改善高体重指数（BMI）对代谢的影响，但对BMI≥25kg/m²的跑步者的研究相对较少。本研究有两个目标：1）通过双能X线吸收法（DXA）测量，确定超重（BMI≥25kg/m²）跑步者（OWR）和正常体重（BMI<25kg/m²）跑步者（NWR）之间身体成分的差异；2）研究90分钟跑步是否会改变OWR和NWR通过DXA测量的全身或局部脂肪量。我们假设OWR的全身脂肪含量会高于NWR，并且长时间跑步后OWR的内脏脂肪变化更大。
在有监督的跑步前后进行身体成分分析。
我们招募了NWR（n = 16，男性：n = 7，年龄28.1±1.4岁，BMI 22.0±0.4kg/m²，结果为平均值±标准误）和OWR（n = 11，男性：n = 7，年龄32.0±1.6岁，BMI 30.5±1.4kg/m²）参与者。在以心率储备的60%进行90分钟有监督跑步前后，测量基于DXA的身体成分。
在所有测量区域，OWR的体脂均高于NWR。跑步后，两组在任何测量的脂肪储存部位的脂肪量均未显著减少。
在所有测量区域，OWR的体脂均高于NWR。长时间跑步后，DXA未能显示出任何急性脂肪量变化。
