基于单片机的语音心率检测仪的设计

语音心率检测仪是通过红外光电传感器采集手指动脉波信号，经过放大和整形处理，经可调分频器后送人单片机进行计算，快速地转换为一分钟心率，并将结果予以LCD显示，同时有语音播报心率以及警报功能。     

高校体育教师职业态度的调查研究

通过对浙江省20所高校体育教师就职业态度的问题进行了问卷调查，调查表明，高校体育教师的职业满意度较高，男女教师之间的职业态度无明显差异，但也较严重地存在职业心态的隐性流失的问题，而职业条件、个人发展、职业社会地位是影响高校体育教师的职业态度的主要因素，要使高校体育教师树立正确、向上的职业态度，就应该采取如下措施：加强政治思想教育；弘扬尊师之风与提高自身素质相结合；建立有效的激励机制。     

小教五年专科女生课余篮球训练探微

全课心率测定每间隔6分钟手测脉率的方法，学生进行五项素质测定方法。篮球的运球和投篮技术考核，用统计学原理分析的方法。     

童心母爱:永不熄灭的教育精神——纪念斯霞诞辰100周年

斯霞的童心母爱是关怀儿童的自然情感,是关乎儿童身心人格长远发展的情感教育。斯霞的童心母爱是深具小学教育专业特质的教育爱品质。斯霞的童心母爱是人性美善之爱、职业道德之爱、公民责任之爱的集合。斯霞的精神性大爱是当前中国社会迫切呼唤的教育文化。     

科技期刊编辑"走心"做好审稿工作

"审稿走心"是指科技期刊编辑不流于表面,用心分析稿件.短则在数分钟内充分调动记忆力与科学的思维,可发现内容前后不一致、细节描述错误、框架内容不符合逻辑等写作问题,甚至是实验设计相关问题;长则数天将稿件放在心上,在潜意识里进行思索.     

Metabolic optimisation of the basketball free throw

The free throw (FT) is a fundamental basketball skill used frequently during a match. Most of actual play occurs at about 85% of maximum heart rate (HR). Metabolic intensity, through fatigue, may influence a technically skilled move as the FT is. Twenty-eight under 17 basketball players were studied while shooting FTs on a regular indoor basketball court. We investigated FT accuracy in young male basketball players shooting at three different HRs: at rest, at 50% and at 80% of maximum experimentally obtained HR value. We found no significant FT percentage difference between rest and 50% of the maximum HR (FT percentage about 80%; P > 0.05). Differently, at 80% of the maximum HR the FT percentage decreased significantly by more than 20% (P < 0.001) down to about 60%. No preliminary warm-up is needed before entering game for the FT accuracy. Furthermore, we speculate that time-consuming, cooling-off routines usually performed by shooters before each FT may be functional to improve its accuracy.     

三相笼型异步电动机减压起动控制方法综述

三相笼型异步电动机由于具有结构简单,坚固耐用,适应性强,运行高效等良好性能,被广泛应用于工农业生产、国防建设、科学技术研究等各个领域。本论文从三相笼型异步电动机的减压起动控制综合分析了减压起动控制方法的控制过程中数量关系并阐述了其各自的特点及适用范围,且对电动机起动控制方法未来的发展趋势做了进一步探讨与展望,对高效利用电动机性能、延长其使用寿命及有效减弱对电网的冲击力等方面的探究具有重要的意义。     

健身体育运动对提高人体心肺功能的作用

文章系统地介绍了心肺功能的一些常识知识,论述了体育锻炼对心肺功能的重要性,分析了如何通过科学合理的、适合自身锻炼的运动项目来促进心肺功能的提高,以及怎样科学合理地制定提高心肺功能的体育运动处方,以期为健身体育运动对提高人体心肺功能作用的研究提供参考。     

中等强度运动对大鼠心室肌蛋白质组差异表达的影响

目的:探讨4周中等强度运动后大鼠左、右室肌蛋白质组的差异性表达,初步筛选出心脏在运动反应与适应过程中的目标蛋白质;方法:将18只雄性SD大鼠随机分为实验组和平行对照组(n=9)。实验组经4周中等负荷强度(70%V.O2max～80%V.O2max)跑台训练后,与对照组一起,提取左、右室肌组织的全蛋白样品。进行2-DE蛋白样品分离,采用PD-Quest软件进行图像分析和数据采集。选择运动后差异表达量≥10倍的备选目标蛋白点,进行胶內原位酶解与一、二级质谱鉴定;结果:运动后左、右心室差异表达量≥10倍的蛋白质点共24个,取其中9个点,经一、二级质谱鉴定出ATP合酶偶合因子6、葡萄糖调节蛋白78、烯酰辅酶A水合酶、ATP合酶α亚基、丙酮酸脱氢酶E1α1、硒联蛋白1、类似信号增殖关联蛋白1和丝氨酸精氨酸前体-mRNA拼接因子SR-A1以及一个分子量为116kDa的未知蛋白;结论:1)实验大鼠在心脏重塑过程中,左、右室肌蛋白质组发生了显著的变化。2)成功筛选出在运动医学领域中尚未涉足的8种目标蛋白,其表达量发生的适应性变化表明,在中等强度运动下,会引起心肌能量代谢水平的提高、心肌应激反应与适应能力的增强、血压调节能力的改善等一系列有益变化。     

Cardiac autonomic and haemodynamic recovery after a single session of aerobic exercise with and without blood flow restriction in older adults

This study investigated the autonomic and haemodynamic responses to different aerobic exercise loads, with and without blood flow restriction (BFR). In a crossover study, 21 older adults (8 males and 13 females) completed different aerobic exercise sessions: low load without BFR (LL) (40% VO_2max), low load with BFR (LL-BFR) (40% VO_2max + 50% BFR) and high load without BFR (HL) (70% VO_2max). Heart rate variability and haemodynamic responses were recorded during rest and throughout 30 min of recovery. HL reduced R–R interval, the root mean square of successive difference of R–R intervals and high frequency during 30 min of recovery at a greater magnitude compared with LL and LL-BFR. Sympathetic–vagal balance increased the values for HL during 30 min of recovery at a greater magnitude when compared with LL and LL-BFR. Post-exercise haemodynamic showed reduced values of double product at 30 min of recovery compared to rest in LL-BFR, while HL showed higher values compared to rest, LL-BFR and LL. Reduced systolic blood pressure was observed for LL-BFR (30 min) compared to rest. Autonomic and haemodynamic responses indicate lower cardiovascular stress after LL-BFR compared to HL, being this method, besides the functional adaptations, a potential choice to attenuate the cardiovascular stress after exercise in older adults.