The effect of acute aerobic exercise on central arterial stiffness,wave reflections,and hemodynamics in adults with diabetes: A randomized cross-over design

BackgroundIndividuals with diabetes have greater central arterial stiffness, wave reflections, and hemodynamics, all of which promote the accelerated cardiovascular pathology seen in this population. Acute aerobic exercise has been shown to be an effective strategy for reducing central arterial stiffness, wave reflections, and hemodynamics in healthy individuals; however, the effects of acute aerobic exercise in reducing these outcomes is not well established in people with diabetes. Recently, implementation of high-intensity interval exercise (HIIE) has shown superior improvements in cardiovascular health outcomes when compared to traditional aerobic exercise. Yet, the effect of HIIE on the aforementioned outcomes in people with diabetes is not known. The purpose of this study was to (i) describe the central arterial stiffness, wave reflections, and hemodynamic responses to a bout of HIIE and moderate-intensity continuous exercise (MICE) in adults with diabetes; and (ii) compare the effects of HIIE and MICE on the aforementioned outcomes.MethodsA total of 24 adult men and women (aged 29–59 years old) with type 1 (n = 12) and type 2 (n = 12) diabetes participated in a randomized cross-over study. All participants completed the following protocols: (i) HIIE: cycling for 4 × 4 min at 85%–95% of heart rate peak (HR_peak), interspersed with 3 min of active recovery at 60%–70%HR_peak; (ii) MICE: 33 min of continuous cycling at 60%–70%HR_peak; and (iii) control (CON): lying quietly in a supine position for 30 min.ResultsA significant group × time effect was found for changes in central systolic blood pressure (F = 3.20, p = 0.01) with a transient reduction for the HIIE group but not for the MICE or CON groups. There was a significant group × time effect for changes in augmentation index at a heart rate of 75 beats/min (F = 2.32, p = 0.04) with a decrease following for HIIE and MICE but not for CON. For all other measures of central arterial stiffness and hemodynamics, no significant changes were observed (p > 0.05).ConclusionA bout of HIIE appears to lead to a greater transient reduction in central systolic blood pressure than the reduction observed following MICE; however, both HIIE and MICE improved augmentation index at a heart rate of 75 beats/min in people with diabetes. There was no significant difference in response to HIIE and MICE in all outcomes. This provides preliminary evidence on the role of HIIE on such outcomes in people with diabetes.     

主流话语与民间话语的互动与融合——遵义《红军坟的故事》叙述

《红军坟的故事》是由一个真实的事件转化的民间传说,但在其流传过程中,意义发生了流变,由一个真实的红色历史故事演变为灵异类的"红军菩萨"。这一演变,虽然从形式上与主流意识形态的观念有一定的抵牾,但其内在实质则彰显了广大民众对共产党执政合法性的心理认同。由此,使国家意志与民众内在心理情感需求形成了一种契合。     

太极拳、练功十八法锻炼对老年人血浆t—PA、PAI活性的影响

对26名坚持太极拳和练功十八法锻炼的老年人,进行了血浆t—PA、PAI活性的测定,并与正常老年人对照组和 CHD组进行了比较。结果显示,坚持太极拳和练功十八法锻炼的老年人,血浆PAI活性明显低于对照组和CHD组。这对防治AS、CHD等疾病有积极的意义。     

不同位置男篮运动员血乳酸与心率的测定

通过对体育学院篮球专项学生比赛时血乳酸和心率的测定,发现运动员血乳酸值的增加具有显著的统计学意义,且不同位置的运动员血乳酸值并不相同,其比赛时能量供应的特征也不一样。     

金钗世界的一彪英风豪气--《红楼梦》闲笔艺术论

《红楼梦》两场府外宴席描写属于"闲笔",除有"接引"过渡"宝黛爱情主线、调节叙事章法疏密张弛的结构作用外,还凸现了众多人物的形质气性,冯紫英"擦边球"式的出场,一派英气扑面而来,为《红楼梦》群钗世界熔冶了几许刚性;所截取的宝玉园外生活断面,还为主体情节的演进增补了丰富的社会生活内涵,强化了作品的写实性。     

1.6一二磷酸果糖对疲劳性游泳大鼠自由基和血尿酸、血肌酐代谢的影响

通过测定游泳运动前后大鼠血HL、肾皮质MDA含量、SOD活性及血浆尿酸和肌配含量,发现运动后即刻肾皮质MDA含量、血浆尿酸及肌酥含量显著增高,SOD活性轻度下降。运动后2h肾皮质MDA含量、血浆尿酸及肌研含量仍处于较高水平。提示运动中及恢复期存在肾组织缺血／再灌注引起的自由基损伤,由此对运动中肾小球滤过机能及运动后肾功能的恢复产生不良影响。在运动前后均喂服FDP可有效促进运动后2h肾功能的恢复,减少脂质过氧化造成的损伤,降低血尿酸、血肌研含量。     

我国优秀体操运动员血循环动力学研究

应用CF-Ⅱ型心血管功能智能检诊议,对我国136名优秀体操运动员,进行血流动力学检测。从心脏功能、血管功能、末梢和内脏循环功能比较了优秀体操运动员和对照组之间血流动力学指标的差别。为高级体操运动员选材、训练水平的综合评定等提供了血循环动力学指标的重要参数。     

红水河流域少数民族传统体育与高校体育校本课程开发

基础教育新一轮课程改革实行三级课程管理体制,地方和学校对课程的决策权进一步加大,其中,体育与健康课程改革对课程开发提出了较高要求。文章对利用红水河流域少数民族传统体育资源对校本课程的开发进行了探讨,认为红水河流域少数民族传统体育资源具有较高的校本课程开发价值和开发潜力,并且对红水河流域高校进行少数民族传统体育校本课程开发具有重要的现实意义。     

银杏口服液配合太极拳对高血压患者血压和血脂的影响

目的:研究银杏口服液配合太极拳对高血压患者血压和血脂的影响的效果.方法:50名患者随机分为两组,运动组和对照组.运动组引用银杏口服液配合太极拳运动,对照组服用西药.记录其治疗前后血压和血脂.结果:银杏口服液配合太极拳能够有效的降低高血压患者的血压,能够改善其血脂含量.     

机械牵拉刺激对大鼠骨骼肌卫星细胞增殖的影响

目的：探讨机械拉伸刺激对骨骼肌卫星细胞增殖能力的影响。方法：通过Flexercell细胞拉伸力学装置对骨骼肌卫星细胞施加5％、15％和25％拉伸应变加载实验，用CCK-8法检测细胞受机械刺激后的增殖变化，采用BCA蛋白测定试剂盒测定细胞总蛋白含量。结果：骨骼肌卫星细胞受机械张力刺激后，发现卫星细胞增殖能力增强，蛋白含量增加，其中，15％拉伸应变率的促增殖与对照组有显著性差异（P〈0．01）。结论：机械刺激可以促进体外卫星细胞的增殖能力，细胞增殖能力与细胞所受刺激的负荷大小有关。