Etiology of Skeletal Muscle Injuries     

LU Dinghou 《北京体育大学学报》1995,(Z2)

Based on the results of our observation, the delayed alteration of contractile structures resulted from the delayed predominant degradation of contractile proteins of skeletal muscle constitute the background of the chronic or acute skeletal muscle injury. There fore,the arrangement of workload should be considered as the most important factor in preventing skeletal muscle injury.  相似文献   

肌肉疲劳的细胞机制及特征(综述)     

曾民 《山东体育学院学报》1997,(4)

通过对有关文献资料的综合分析讨论，对高强度训练时肌肉疲劳的细胞机制及特征进行探讨。发现肌肉疲劳的细胞机制主要与氢离子和磷酸盐有关，细胞特征主要表现为肌力下降，膜动作电位时间延长，幅度及传播速度下降，肌浆网对钙离子吸收延缓  相似文献   

骨骼肌纤维类型在不同的条件下的转化研究   总被引：3，自引：0，他引：3  

李江华  刘承宜 《首都体育学院学报》2008,20(2):50-54

随着研究条件与相关技术的发展,近年来科研人员对骨骼肌纤维类型进行了大量的细胞与分子生物学水平的研究。研究发现,除发育因素外,神经支配,运动训练,负荷或去负荷,激素以及衰老等各种因素均对骨骼肌纤维的特异蛋白质表达产生影响,乃至改变肌纤维的种类和肌肉的肌纤维组成。对于成体已发育成熟的骨骼肌来说,在此情况下无论是何种因素引起的肌纤维转化,似乎都与神经支配和神经-肌肉或神经-内分泌活动的变化有关。目前对骨骼肌纤维转化的机理存在多种解释,其中以Chin等根据对成肌细胞培养的研究结果率先提出"骨骼肌特异纤维类型基因表达受钙调神经磷酸酶(calcineurin)依赖性转录信号途径(signaling pathway)控制"这一学说为代表。但是这些理论都不成熟,对骨骼肌纤维转化的机制还需要进一步研究。  相似文献   

腰椎牵引配合电子热磁治疗运动性腰肌劳损的临床观察     

周玫 《黑龙江科技信息》2014,(11):38-38

目的观察腰椎牵引配合电子热磁治疗仪治疗运功性腰肌劳损的疗效。方法选取68例运动性腰肌劳损病例,根据JOA制定的腰椎疾患疗效判断标准随机分为治疗组、对照组。两组均应用电脑控制腰椎牵引装置治疗,治疗组配合电子热磁治疗仪。结果根据JOA制定的腰椎疾患疗效判断标准评分计算治疗前后的改善率,统计学处理后进行比较。结论腰椎牵引配合电子热磁治疗仪在治疗运动性腰肌劳损较单一腰椎牵引治疗效果更佳显著。  相似文献   

注射用头孢唑肟钠用药安全评价的试验研究     

周艳艳  张俊明  郑国安 《科技广场》2011,(11)

目的：评价注射用头孢唑肟钠制剂用药的安全性。方法：按照国家SFDA颁发的《化学药物刺激性、过敏性和溶血性研究技术指导原则》进行了局部血管刺激性、肌肉刺激性、溶血性和全身主动过敏性试验。结果：①注射用头孢唑肟钠耳缘静脉点滴给药浓度为0.04g/ml,给药容积为2ml/kg时,对试验兔血管无刺激性;②注射用头孢唑肟钠肌肉注射给药浓度为0.25g/ml,给药容积为0.5ml/只时,对试验兔肌肉无刺激性;③注射用头孢唑肟钠药物浓度为0.04g/ml,在体外试验条件下无溶血反应及红细胞凝聚反应;④注射用头孢唑肟钠致敏剂量为0.067和0.133g/kg,激发剂量为0.067和0.133g/kg时,对豚鼠无主动全身过敏性反应。结论：注射用头孢唑肟钠试验条件下无血管和肌肉刺激性、无溶血性及过敏性反应。  相似文献   

骨骼肌缺血再灌注损伤机制及其防治进展   总被引：1，自引：0，他引：1  

孙君志  苏全生 《四川体育科学》2006,(4):46-50

本文综述了骨骼肌缺血再灌注损伤的机制和防治进展。认为缺血再灌注损伤不仅与自由基、钙超载和白细胞等因素相关,而且细胞凋亡和一氧化氮等因素同样是其重要的致病环节;其防治策略包括缺血预处理和抗氧化等措施,并不断有新方法被发现并应用于临床。缺血再灌注损伤与多种临床疾病及运动损伤密切相关,探讨骨骼朋缺血再灌注损伤的机制对再灌注损伤的预防和处理及骨骼肌功能的恢复具有重要的实践意义。  相似文献   

红毛五加多糖对解除运动后大鼠骨骼肌疲劳作用的组织化学研究   总被引：7，自引：0，他引：7  

应瑞春  刘英学  李成果  孙常义 《西安体育学院学报》2006,23(2):70-72,83

探讨中药红毛五加多糖对解除骨骼肌疲劳的作用。采用组织化学技术形态定量对运动疲劳大鼠股四头肌不同类型肌纤维的成分进行定量分析。经服中药组恢复后的三种肌纤维类型的糖原含量、琥珀酸脱氢酶(SDH)的活性明显高于疲劳组(P<0.01)。提示红毛五加多糖对解除骨骼肌的疲劳、促进有氧代谢,提高有氧耐力训练水平有重要作用。  相似文献   

Influence of fasting on muscle composition and antioxidant defenses of market-size Sparus macrocephalus     

Zhang Xiao-dong  Wu Tian-xing  Cai Li-sheng  Zhu Yong-fei 《Journal of Zhejiang University. Science. B》2007,8(12):906-911

The study was conducted to investigate fasting effects on flesh composition and antioxidant defenses of market-size Sparus macrocephalus. Two hundred fish (main initial weight 580 g) were divided into two groups (control and fasted) and reared in 6 cages. After two weeks of adaptation, group I fasted for 28 d; group II was fed normally as a control. In 3, 7, 14, 21 and 28 d, 6 fish per group were sampled for proximate flesh composition, liver antioxidant enzyme activities and malondialdehyde flesh content analyses. In fasted fish, the reduction of lipid content in muscle occurred after day 3, and, compared to controls, the content of protein decreased from day 14, the activities of liver antioxidative enzymes superoxide dismutase (SOD) and glutathione peroxidase (GPX) increased from day 3, and flesh malondialdehyde levels increased from day 21. Flesh fat reduction shows that fasting may be used as a technique to reduce flesh lipid content in Sparus macrocephalus. However, considering flesh protein loss and the subsequent oxidative stress, the fasting technique should be used with precautions. Project (No. 2006C12098) supported by the Science and Technology Department of Zhejiang Province, China  相似文献   

The reliability of linear position transducer,force plate and combined measurement of explosive power-time variables during a loaded jump squat in elite athletes     

Keir T. Hansen  John B. Cronin  Michael J. Newton 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(1):46-58

The purpose of this study was to determine the between day reliability of power-time measures calculated with data collected using the linear position transducer or the force plate independently, or a combination of the two technologies. Twenty-five male rugby union players performed three jump squats on two occasions one week apart. Ground reaction forces were measured via a force plate and position data were collected using a linear position transducer. From these data, a number of power-time variables were calculated for each method. The force plate, linear position transducer and a combined method were all found to be a reliable means of measuring peak power (ICC = 0.87‐0.95, CV = 3.4%‐8.0%). The absolute consistency of power-time measures varied between methods (CV = 8.0%‐53.4%). Relative consistency of power-time measures was generally comparable between methods and measures, and for many variables was at an acceptable level (ICC = 0.77‐0.94). Although a number of time-dependent power variables can be reliably calculated from data acquired from the three methods investigated, the reliability of a number of these measures is below that which is acceptable for use in research and for practical applications.  相似文献   

营养因素对肉鸡肌肉生长的影响     

许雪萍 《安徽科技学院学报》2008,22(4)

文中通过分析多种营养因素对肉鸡肌肉生长的影响,认为在肉鸡生产中适当增加日粮中的能量和蛋白质水平,补充必需氨基酸和微量元素,采用一定的限饲技术等,均可不同程度的提高肉鸡肌肉产量,改善肌肉的品质.  相似文献