浅析赛艇运动员的专项力量训练   总被引：7，自引：0，他引：7  

肖永霞  高建深 《安徽体育科技》2002,23(2):59-61

赛艇运动员的专项力量即为:赛艇运动员在完成划浆技术动作过程中,神经肌肉克服内外阻力的活动能力,由此可知,专项力量训练对赛艇运动的重要性.它是影响赛艇运动成绩的基本因素.所以,专项力量的训练,受到国内外教练的普遍重视.虽然他们的训练方法各有不同,但其训练原理是一致的.即发展肌肉克服外界对船的阻力而产生的能力.  相似文献   

农村中学素质教育的阻力及其消除     

孙立周 《安庆师范学院学报(社会科学版)》2001,20(1):83-84

农村中学推行素质教育 ,阻力较大。阻力来自两个方面 :传统的思想观念和滞后的客观条件。必须采取相应的有效措施 ,方方面面共同努力 ,真正使农村中学的素质教育扎扎实实地开展起来。  相似文献   

运动员膝关节损伤后的渐进抗阻康复训练     

诸剑英  马利华 《上海体育学院学报》1992,(1)

运动员膝关节损伤后,采用常规康复训练,效果不太理想。通过实验对比发现,在最大伸膝力量增长、大腿围度增加等方面,运动员膝关节损伤后如采用渐进抗阻康复训练手段,效果优于常规康复训练。  相似文献   

普通高校体育教学中创新教育的阻力与对策   总被引：2，自引：0，他引：2  

王永翔  赵宏 《南京体育学院学报(社会科学版)》2004,18(6):152-154

利用文献资料法从指导思想、教学内容、教学手段和评价方法四个方面分析了高校体育教学中实施创新教学的阻力,并提出了转变思想观念,实行个性化教育,改革体育教学模式,教学方法和教学评价体系,创造生动活泼的教学氛围,建立民工和谐的师生关系等对策。  相似文献   

双人赛艇兴波阻力特性分析   总被引：3，自引：2，他引：1  

郑伟涛  马勇  邹早建 《武汉体育学院学报》2002,36(6):153-156

采用Michell积分计算赛艇兴波阻力，得到了赛艇兴波阻力随航速的变化规律。将本文计算结果与用三维Rankine源面元法计算得到的赛艇兴波阻力相比较，结果表明Michell积分是一种计算赛艇高速下兴皮阻力的简单实用方法。还分析了双人赛艇兴波阻力和所需功率随体重的变化特性。  相似文献   

感染白粉病后不同葡萄品种的一些酶活性变化     

王立如  徐永江  方丽  房聪玲  高长达  王汉荣 《科技通报》2011,27(1):66-70

植物受到病原菌侵染或被诱导处理后能产生一些诱导型抗病物质的合成或直接作用于病原菌的酶类和抗病酚类物质,利用这特性研究葡萄对白粉病的抗性.16个不同的葡萄品种接种白粉病后,测定POD、PPO、PAL等三种酶的酶活性差异,结果发现,接种白粉病后葡萄叶片三种酶活性水平均有提高,其中POD酶活性变化较PPO和PAL明显,PPO...  相似文献   

阿维菌素的抗肿瘤及作用机制研究进展     

鲍玉杰  陆建卫  裘娟萍 《科技通报》2011,27(3):359-365

阿维菌素是一类大环内酯类抗生素,对寄生虫具有很高的杀虫活性.近年来研究发现阿维菌素类药物还具有抗肿瘤作用,可以抑制P-糖蛋白对其底物的外排作用及ATPase活性,同时可以抑制肿瘤的多药耐药性,提高肿瘤对抗癌药物的敏感性.阿维菌素类药物与P-糖蛋白结构亲和性关系对于提高大环内酯类抗生素的生物利用度和多药耐药性的逆转是非常...  相似文献   

Comparison Between Serum Insulin Levels and Its Resistance With Biochemical,Clinical and Anthropometric Parameters in South Indian Children and Adolescents     

Srinivasa Nageswara Rao G  Prema G  Priya G  Arumugam SB  Kirthivasan V  Saibabu R  Cherian KM 《Indian journal of clinical biochemistry : IJCB》2011,26(1):22-27

There is a rising trend in the prevalence of insulin resistance among obese, overweight children and adolescents. The serum insulin and its correlation with biochemical, clinical and anthropometric parameters were evaluated in 185 children and adolescents (59 control, 52 obese, 49 overweight, 25 congenital heart disease) of age group 10–17 years. The levels of serum insulin were measured by ELISA. Serum insulin levels were found to be significantly increased in children who were obese, overweight and had congenital heart disease, than controls. Serum insulin levels positively correlated with BMI, WHR, and serum C-peptide, serum leptin, total cholesterol, triglycerides, LDL-cholesterol, systolic and diastolic blood pressure. Fasting glucose levels were found to be negatively correlated with serum insulin levels. HDL-cholesterol levels were non-significant among the study groups. We identified nine obese children (five girls and four boys) with the features of metabolic syndrome and 69% of obese and overweight children were identified with insulin resistance. Insulin resistance was strongly associated with metabolic syndrome and its components, especially with central obesity and hypertriglyceridemia.  相似文献   

Correlation of Adiponectin and Leptin with Insulin Resistance: A Pilot Study in Healthy North Indian Population     

Yadav A  Jyoti P  Jain SK  Bhattacharjee J 《Indian journal of clinical biochemistry : IJCB》2011,26(2):193-196

The increasing incidence of obesity, leading to metabolic complications is now recognized as a major public-health problem. Insulin resistance is a central abnormality of the metabolic syndrome, or syndrome X, originally hypothesized by Reaven Insulin resistance is more strongly linked to intra abdominal fat than to fat in other depots. Adipose tissue secretes numerous factors (adipokines) known to markedly influence lipid and glucose/insulin metabolism, oxidative stress, and cardiovascular integrity. Some of these adipokines have been shown to directly or indirectly affect insulin sensitivity through modulation of insulin signaling and the molecules involved in glucose and lipid metabolism. A pilot study was conducted with 80 healthy subjects who were non diabetic, non hypertensive and having no family history of hypertension, the aim was to evaluate the correlation of adiponectin and leptin levels with obesity and insulin resistance markers in healthy north Indian adult population. Serum leptin, adiponectin and insulin was estimated by sandwich ELISA method. In our study, Leptin correlated significantly with BMI (P value of 0.0000), WC (P value = 0.007), and HC (P value = 0.000). leptin showed significant positive correlation with fasting insulin (P value 0.002), post prandial insulin (P value = 0.000) and HOMA-IR (P value = 0.002). Adiponectin showed significant positive correlation with triglycerides (P value = 0.038), strong negative correlation with HDL-cholesterol (P value = 0.017). Serum concentrations of leptin are associated with central body fat distribution. Insulin resistance and adiponectin is associated with dyslipidemia and these all disorders may ultimately lead to metabolic syndrome.  相似文献   

多重制度压力与企业合法性倾向选择:一个理论模型     

宋铁波  曾萍 《软科学》2011,25(4):112-116

在文献研究的基础上,构建了一个多重制度压力下企业合法性倾向选择模型。针对某种特定的制度压力,只有当企业本身对该种制度压力具有抵制动机、且具有相应的抵制能力的情形下,企业才能选择抵制程度较高的合法性倾向,而在其他情形下,企业将主动或者被动地选择顺从程度较高的合法性倾向。  相似文献