跑台运动与负重游泳致大鼠力竭性疲劳时心肌骨骼肌组织学变化特征观察   总被引：2，自引：0，他引：2  

黄明  丁同英  张晓玲  殷劲  高兴  苏全生 《成都体育学院学报》1996,(4)

】通过对大鼠跑台运动和负重游泳致力竭性疲劳时血乳酸的测定及对心肌、骨骼肌组织学损伤程度的观察，研究糖酵解供能条件下不同运动致力竭性疲劳时，心肌、骨骼肌组织学变化特征及致疲劳原因。结果表明，力竭性疲劳时，与游泳组相比，跑台组大鼠心肌和骨骼肌的组织学损伤相对较少，且血乳酸浓度也低于游泳组（Ｐ＜０．０１）。这提示，不同的运动方式对疲劳进程有不同的影响，并且在此运动模型中，血乳酸可能是引起疲劳性损伤的重要因素  相似文献   

古典式青年摔跤运动员大强度训练期部分生化指标的监测研究   总被引：4，自引：0，他引：4  

封飞虎  刘勇 《上海体育学院学报》2005,29(2):55-58

采用测试法,跟踪监测古典式青年摔跤运动员大强度训练期间部分生化指标。结果显示：血红蛋白在训练初期明显降低,是反映摔跤训练强度和运动员产生适应的敏感指标;训练期间的血尿素、血清肌酸激酶的“恢复值”可作为医务监督的重要参考指标;血清睾酮、血清皮质醇及其比值用作评价运动员机能状况。  相似文献   

人类身体成份特征与运动能力(第一部分)   总被引：2，自引：0，他引：2  

杨锡让  符浩坚  张士祥  隆璐娟  杨谦  翟薇薇  王秀蓉  赖柳明  常燕  高潮 《北京体育大学学报》1994,(2)

用整体的系统观从多层次、多途径来指导身体成分的研究，做为总课题的第一部分，探讨了身体成分的以下问题：1）几种身体成分测试方法的准确性；2）不同地区、不同年龄、不同性别和不同民族的身体成分特点；3）不同运动项目对身体成分的影响；4）遗传因素与身体成分的关系；5）女孩在初潮前后、运动与不运动对身体成分的影响。  相似文献   

Stability studies of common biochemical analytes in serum separator tubes with or without gel barrier subjected to various storage conditions     

Cuhadar S  Atay A  Koseoglu M  Dirican A  Hur A 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2012,22(2):202-214

Introduction

The collected and shipped blood samples are exposed to a various extra-analytical factors prior to analysis. The aim of the study was to determine the stability of analytes in serum gel tubes and plain tubes exposed to a range of storage temperatures and times after centrifugation.

Materials and methods:

Fifteen healthy volunteers were recruited and venous blood was collected into four tubes, two with and two without gel separator. Analyzing the baseline samples in 30 min, all were stored at 4ºC or 24ºC for 6, 12, 18, 24, 30, 36, 48 and 72 hours and 1 week. Sixteen biochemical anaytes were measured on each sample. Variations remained under the desirable bias considered as clinically insignificant.

Results:

On day three, most analytes remained stable including albumin, protein, creatinine, cholesterol, triglycerides, gamma-glutamyl transferase (GGT), alkaline phosphatase (ALP), alanine aminotransferase (ALT), creatine kinase (CK), lactate dehydrogenase (LD) regardless of tube types. Glucose concentration decreased markedly (P = 0.001) beginning from the first hours of storage in plain serum. The stability maximized for the analytes including glucose, total bilirubin, urea nitrogen (BUN), uric acid stored at 4 ºC in gel tubes. Aspartate aminotransferase (AST) activity increased significantly (P = 0.002) up to 48-h, however bias was not significant clinically. High density lipoprotein (HDL) concentration was stable in gel tubes at 24 ºC, in plain tubes at 4 ºC stored up to 36-h.

Conclusion:

Serum gel or non-gel tubes might be used interchangeably for 11 analytes chilled or at 24 ºC, whereas some restrictions must be applied for glucose, AST, BUN, HDL, and uric acid.  相似文献   

Preanalytical phase--a continuous challenge for laboratory professionals     

Simundic AM  Lippi G 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2012,22(2):145-149

Preanalytical phase is the most vulnerable part of the total testing process and is considered to be among the greatest challenges to the laboratory professionals. However, preanalytical activities, management of unsuitable specimens and reporting policies are not fully standardized, nor harmonized worldwide. Several standards related to blood sampling and sample transportation and handling are available, but compliance to those guidelines is low, especially outside the laboratory and if blood sampling is done without the direct supervision of the laboratory staff. Furthermore, for some most critical procedures within the preanalytical phase, internationally accepted guidelines and recommendations as well as related quality measures are unfortunately unavailable. There is large heterogeneity in the criteria for sample rejection, the different strategies by which unacceptable samples are managed, processed and test results reported worldwide. Management of unacceptable specimens warrants therefore immediate harmonization. Alongside the challenging and long road of patient safety, preanalytical phase offers room for improvement, and Editors at Biochemia Medica Journal definitely hope to continue providing a respective mean for reporting studies on different preanalytical phase topics. With pleasure and delight we invite potential future authors to submit their articles examining the quality of various preanalytical activities to Biochemia Medica. We will keep nurturing this topic as our prominent feature and by this we hope to be able to deliver valid evidence for some future guidelines and recommendations.  相似文献   

Associations of accelerometer-measured sedentary time,sedentary bouts,and physical activity with adiposity and fitness in children     

《Journal of sports sciences》2012,30(1):114-120

ABSTRACT

Sedentary time (ST) has been inconsistently associated with adiposity and cardiorespiratory fitness in children in previous studies. We studied cross-sectional associations of ST, light physical activity (LPA), and moderate-to-vigorous physical activity (MVPA) with fat mass index (FMI) and cardiorespiratory fitness (estimated VO₂max). Associations were evaluated with and without considering pattern of ST by bout length. We measured ST and activity by a wrist-worn accelerometer, FMI by bioelectrical impedance, and VO₂max by Pacer test in 443 children (51.2% girls, 10.2 ± 0.6 years). Isotemporal substitution regression models estimated the effects of substituting ST, LPA, and MVPA on FMI and VO₂max. Further models repeated analyses separating ST into short (<10 min) and long (≥10 min) bouts. Only replacing ST or LPA with MVPA was consistently associated with lower FMI and greater VO₂max. When separated by bout length, only one unique association was found where replacing long ST bouts with short ST bouts was associated with lower FMI in girls only. In conclusion, activity pattern is associated with adiposity in girls and fitness in boys and girls. Separating ST into long and short ST bouts may be of minimal importance when assessing associations with adiposity and fitness using wrist-worn accelerometry in children.  相似文献   

谈离子交换树脂的污染与处理   总被引：1，自引：0，他引：1  

杜新 《辽宁科技学院学报》2004,6(4):17-18

树脂被污染有两种情况,一种是树脂的中毒,另一种是树脂的老化.本文主要讲述阴离子交换树脂在不同水源情况下被污染的处理.  相似文献   

Acute cardiovascular responses to interval exercise: A systematic review and meta-analysis     

Kym Joanne Price  Brett Ashley Gordon  Stephen Richard Bird  Amanda Clare Benson 《Journal of sports sciences》2020,38(9):970-984

ABSTRACT

Interval exercise training is increasingly recommended to improve health and fitness; however, it is not known if cardiovascular risk is different from continuous exercise protocols. This systematic review with meta-analyses assessed the effect of a single bout of interval exercise on cardiovascular responses that indicate risk of cardiac fibrillation and infarction compared to continuous exercise. Electronic databases Medline, CINAHL, Embase, Scopus and Cochrane were searched. Key inclusion criteria were: (1) intervals of the same intensity and duration followed by a recovery period and (2) reporting at least one of blood pressure, heart rate variability, arterial stiffness or function. Cochrane Risk of Bias tool and GRADE approach were used. Meta-analyses found that systolic blood pressure responses to interval exercise did not differ from responses to continuous exercise immediately (MD 8 mmHg [95% CI ?32, 47], p = 0.71) or at 60 min following exercise (MD 0 mmHg [95% CI ?2, 1], p = 0.79). However, reductions in diastolic blood pressure and flow-mediated dilation with interval exercise were observed 10–15 min post-exercise. The available evidence indicates that interval exercise does not convey higher cardiovascular risk than continuous exercise. Further investigation is required to establish the safety of interval exercise for clinical populations.  相似文献   

影响脂肪代谢的因素及其与运动能力的关系     

徐玉娥 《陕西理工学院学报(社会科学版)》2001,19(6):92-95

通过对脂肪的储备、动员、激素调节、代谢调节过程的阐述 ,论述了运动过程中脂肪代谢供能与运动强度、运动持续时间、激素水平、脂酶浓度、糖代谢等因素的关系 ,分析了脂肪代谢对有氧运动能力的影响及脂肪供能的限力因素  相似文献   

SPOC整合翻转课堂教学模式在输血与输血技术课程中的应用和效果评价     

李宗吉  丁淑琴 《科教导刊》2021,(2):146-147,182

探索解决输血与输血技术课程中知识点复杂、实践性强、教学效果不理想等问题的教学新模式,以期提升学生将医学理论知识和临床技能结合用于分析解决临床实际问题的能力.  相似文献