Asano R Y, Browne R A V, Sales M M, Arsa G, Moraes J F V N, Coelho-Júnior H J, Moraes M R, Oliveira-Silva I, Atlas S E, Lewis J E, Simões H G
Curso de Educação Física, Universidade Ibirapuera, São Paulo, SP, Brasil.
Curso de Educação Física, Fundação Municipal de Educação Superior de Bragança Paulista, SP, Brasil.
Braz J Med Biol Res. 2017 Sep 12;50(11):e6400. doi: 10.1590/1414-431X20176400.
The aim of this study was to analyze the acute responses of bradykinin, insulin, and glycemia to exercise performed above and below lactate threshold (LT) in individuals with type 2 diabetes mellitus (T2D). Eleven participants with a diagnosis of T2D randomly underwent three experimental sessions 72 h apart: 1) 20 min of exercise performed at 120% of LT (120%LT), 2) 20 min of exercise performed at 80% of LT (80%LT), and 3) 20 min of control session. Blood glucose was analyzed before, during, and at 45 min post-exercise. Bradykinin and insulin were analyzed before and at 45 min post-exercise. Both exercise sessions elicited a parallel decrease in glucose level during exercise (P≤0.002), with a greater decrease being observed for 120%LT (P=0.005). Glucose decreased 22.7 mg/dL (95%CI=10.3 to 35, P=0.001) at the 45 min post-exercise recovery period for 80%LT and decreased 31.2 mg/dL (95%CI=18.1 to 44.4, P<0.001) for 120%LT (P=0.004). Insulin decreased at post-exercise for 80%LT (P=0.001) and control (P≤0.035). Bradykinin increased at 45 min post-exercise only for 80%LT (P=0.013), but was unrelated to the decrease in glucose (r=-0.16, P=0.642). In conclusion, exercise performed above and below LT reduced glycemia independently of insulin, but exercise above LT was more effective in individuals with T2D. However, these changes were unrelated to the increase in circulating bradykinin.
本研究旨在分析2型糖尿病(T2D)患者在高于和低于乳酸阈值(LT)进行运动时缓激肽、胰岛素和血糖的急性反应。11名确诊为T2D的参与者每隔72小时随机进行三次实验:1)以LT的120%(120%LT)进行20分钟运动;2)以LT的80%(80%LT)进行20分钟运动;3)20分钟的对照实验。在运动前、运动期间和运动后45分钟分析血糖。在运动前和运动后45分钟分析缓激肽和胰岛素。两次运动实验在运动期间均引起血糖水平平行下降(P≤0.002),120%LT时下降幅度更大(P=0.005)。在运动后45分钟恢复期,80%LT时血糖下降22.7mg/dL(95%CI=10.3至35,P=0.001),120%LT时下降31.2mg/dL(95%CI=18.1至44.4,P<0.001)(P=0.004)。80%LT运动后胰岛素下降(P=0.001),对照实验也下降(P≤0.035)。仅80%LT运动后45分钟缓激肽升高(P=0.013),但与血糖下降无关(r=-0.16,P=0.642)。总之,高于和低于LT的运动均可独立于胰岛素降低血糖,但高于LT的运动对T2D患者更有效。然而,这些变化与循环缓激肽的增加无关。