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牛磺酸对力竭运动大鼠抗疲劳的作用 总被引：12，自引：0，他引：12
30只雄性Wistar大鼠按体重随机分为安静组、力竭运动组、服牛磺酸力竭运动组。后两组跑台力竭运动后即刻取血测定血乳酸(LD)含量和乳酸脱氢酶(LDH)活力，取股四头肌红肌测定肌糖原(Muscle glycogen，MG)含量，取肝组织测定肝糖原(Liver glycogen，LG)含量。结果表明：1)与运动组相比，服牛磺酸运动组力竭运动时间有延长的趋势，初步显示牛磺酸能抵抗运动性疲劳的产生；2)与安静组相比，运动组力竭后即刻血清LD、LDH都显升高，MG、LG都显下降，补充牛磺酸能阻抑这种变化，提示牛磺酸具有抗疲劳作用而提高机体的运动能力。 相似文献
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应用牛磺酸消除运动性疲劳的可行性分析 总被引：4，自引：0，他引：4
本文从运动生物化学角度入手，对运动性疲劳进行了分析和研究。同时研究分析了牛磺酸对运动性疲劳的作用。牛磺酸能促进运动自由基的代谢。缓解运动性疲劳，是一种有效的运动营养补剂，具有广泛的应用前景。 相似文献
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牛磺酸是人体内一种重要的条件性必需氨基酸。补充牛磺酸对于机体的运动能力有着重要的影响,本文在介绍牛磺酸的生理作用及代谢过程的基础上,对目前国内外关于补充牛磺酸与提高人体的运动能力的关系,以及作为一种新型的营养补剂等方面研究情况做一综述。 相似文献
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牛磺酸对运动机体的作用 总被引：1，自引：0，他引：1
牛磺酸(Taurine)是细胞内的一种含量很高的游离氨基酸,因1927年首次从牛胆汁中分离出来而得名。近十多年来,国内外的学者对牛磺酸进行了广泛深入的研究。结果表明:牛磺酸是人类的一种条件必需氨基酸,它是细胞的保护剂,同时还具有广泛的生物学作用。笔者就牛磺酸对运动机体的作用加以综述。 相似文献
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牛磺酸对疲劳运动大鼠心肌线粒体SOD和GSH-px活性的影响 总被引：1，自引：0，他引：1
为探讨牛磺酸对运动机体的作用,本研究以力竭游泳大鼠为运动疲劳模型,观察了牛磺酸对心肌线粒体超氧化物歧化酸（ＳＯＤ）、谷胱甘肽过氧化物酶（ＧＳＨ－ｐｘ）活性的影响。结果表明,牛磺酸有显著提高力竭游泳大鼠心肌线粒体ＳＯＤ、ＧＳＨ－ｐｘ活性的作用。这可能是牛磺酸抑制心肌线粒体脂质过氧化水平,保护线粒体膜功能的机制之一。 相似文献
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牛磺酸消除运动性疲劳的研究进展 总被引：5，自引：0，他引：5
魏源 《西安体育学院学报》2004,21(1):54-57,80
根据牛磺酸的生物合成与代谢等特点及其在自由基代谢和运动性疲劳中的作用,阐述了额外补充牛磺酸对运动效果的影响及其机理,并论述了大强度运动中补充牛磺酸对运动能力影响的作用机制,笔者对相关的研究进展进行了系统综述。 相似文献
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牛磺酸和／或递增负荷训练对大鼠骨骼肌不同肌纤维线粒体Ca^2＋-ATP酶活性的影响 总被引：2，自引：0，他引：2
以大鼠力竭性运动为模型，观察了牛磺酸和／或递增负荷训练对大鼠力竭运动后即刻红、白肌线粒体Ca^2 -ATP酶活性的影响。结果显示：1)安静时白肌纤维线粒体Ca^2 -ATP酶活性较红肌的高；2)力竭运动使白肌纤维线粒体Ca^2 -ATP酶活性降低，红肌的则升高；3)5周递增负荷训练对白肌纤维线粒体Ca^2 -ATP酶活性影响较大，而对红肌的几乎没有什么影响；4)牛磺酸能使力竭运动后白肌和红肌张维线粒体Ca^2 -ATP酶活性升高，结合训练其作用更明显。结果提示：递增负荷训练中慢运动单位可能较少参与运动，所以该方法可能只对白肌起到积极的锻炼作用，牛磺酸和／或训练有保护白肌和红肌线粒体的功能和防止红肌线粒体功能损伤的作用。 相似文献
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牛磺酸对力竭运动大鼠心肌线粒体损伤的保护作用 总被引：7，自引：0，他引：7
以大鼠力竭性运动为模型,观察了牛磺酸对大鼠力竭运动时心肌线粒体脂质过氧化、超氧化物歧化酶、总Ca++浓度的影响。结果显示,牛磺酸可降低大鼠力竭运动后心肌线粒体脂质过氧化水平,提高大鼠力竭运动后心肌线粒体超氧化物歧化酶(SOD)的活性,保持大鼠力竭运动后心肌线粒体总Ca++浓度。结果提示,牛磺酸可减少力竭运动后因脂质过氧化而产生的自由基,降低自由基对心肌线粒体的攻击,维持线粒体膜的功能,说明牛磺酸有保护心肌线粒体的功能和防止心肌线粒体损伤的作用。 相似文献
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牛磺酸对运动大鼠心肌和大脑脂褐素及脂质过氧化的影响 总被引：2，自引：0，他引：2
笔者以力竭运动为模型 ,观察了牛磺酸对大鼠心肌和大脑中脂褐素含量、MDA、SOD及GSH的变化 ,探讨了牛磺酸对运动大鼠心肌和大脑脂褐素及脂质过氧化的影响。发现力竭运动可造成大鼠心肌和大脑中脂褐素含量、MDA水平显著增加 ,造成大鼠心肌和大脑中SOD和GSH显著下降 ;而补充牛磺酸可抑制力竭运动后大鼠心肌和大脑中脂褐素含量和MDA水平的显著增加 ,抑制大鼠心肌和大脑中SOD活性和GSH含量显著下降。结论 :牛磺酸可防止运动后大鼠心肌和大脑脂褐素和脂质过氧化增加 ,有保护细胞和抗衰老作用。 相似文献
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《European Journal of Sport Science》2013,13(8):1101-1109
AbstractThis study investigated the effects of oral taurine supplementation on cycling time to exhaustion at a fixed-intensity and thermoregulation in the heat. In a double-blind, randomised crossover design, 11 healthy males participated in a time to exhaustion test in the heat (35°C, 40% RH), cycling at the power output associated with ventilatory threshold, 2?h after ingesting: Taurine (50?mg?kg?1) or placebo (3?mg?kg?1?maltodextrin). Core and mean skin temperature, mean sweat rate, heart rate, rating of perceived exertion (RPE), thermal comfort and thermal sensation were measured during exercise and blood lactate concentration (B[La]) was measured after exercise. Taurine supplementation increased time to exhaustion by 10% (25.16 min vs. 22.43 min, p?=?0.040), end sweat rate by 12.7% (687?nL?min?1 vs. 600?nL?min?1, p?=?0.034) and decreased B[La] by 16.5% (5.75?mmol?L?1 vs. 6.85?mmol?L?1, p?=?0.033). Core temperature was lower in the final 10% of the time to exhaustion (38.5°C vs. 38.1°C, p?=?0.049). Taurine supplementation increased time to exhaustion and local sweating, while decreasing RPE and core temperature in the later stages of exercise, as well as reducing post-exercise B[La]. This study provides the evidence of taurine's role in thermoregulatory processes. These findings have implications for the short-term preparation strategies of individuals exercising in the heat. Based on these findings, a single dose of taurine 2?h prior to training or competition would provide an ergogenic and thermoregulatory effect. 相似文献
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This article aims to provide an overview of the current state of research on the relationship between loneliness and physical activity (PA). A systematic literature search was conducted to identify all empirical studies assessing this relationship. A total of 37 studies stemming from 36 publications met the inclusion criteria. Study analyses comprised an individual consideration of each study and a systematic summarization of the studies. The majority of eligible studies focused on adolescent or elderly populations. Direct negative associations between PA and loneliness were found in half of the 24 cross-sectional studies. Of the seven identified longitudinal studies, one found a direct negative influence of PA on loneliness. Four longitudinal studies found evidence for a reverse influence, namely of loneliness on PA. Five intervention studies found PA to reduce loneliness. Two of the cross-sectional studies and one of the intervention studies found social support and social competence to moderate or to mediate the relationship between PA and loneliness. The findings indicate that PA can contribute to a decrease in loneliness. However, studies also indicate that any beneficial effect is dependent upon the quality of relationships present during physical activity. Additionally, loneliness itself might reduce the probability of being physically active. 相似文献
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现阶段我国排球后备力量状况调研报告 总被引：1，自引：0，他引：1
李国东 《西安体育学院学报》2011,28(6):696-698
排球后备人才建设是我国排球运动成绩延续的保障,现阶段我国排球后备力量培养的主体是25所高水平后备人才基地,从调研的情况来看,存在教练员梯队建设不合理、队伍一定程度的老化、教练员学历水平与知识结构不相符等问题。同时发现,女子后备力量要好于男子。各支队伍每年比赛的场次较少,难以达到锻炼青少年运动员的目的。 相似文献
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徐忠 《哈尔滨体育学院学报》2012,30(3):118-121
对徐州医学院2009～2011级在校学生体质测试的成绩、身体形态和肺活量的相关数据进行统计和分析,发现在校学生体能素质、身体形态、肺活量等指标达标率低,学生在校期间体质有逐年下降的趋势。通过问卷调查与分析,找出医学院校学生缺乏体育锻炼的主要原因。通过专家访谈法,结合实际情况找出影响医学院校学生体质健康的因素,并提出有针对性的建议和制定适合增强医学院校学生体质健康的对策。 相似文献
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The aim of this study was to investigate, for typical shoes and surfaces used in tennis, the relative role of the shoe and
surface in providing cushioning during running. Five test surfaces ranging from concrete to artificial turf were selected,
together with two shoe models. Impact absorbing ability was assessed mechanically using drop test procedures and biomechanically
using peak magnitude and rate of loading of impact force and peak in-shoe pressure data at the lateral heel. Differences in
biomechanical variables between shoe-surface combinations were identified using a two-way ANOVA (p < 0.05). Mechanical test results were found to rank the surfaces in the same order regardless of the shoe model, suggesting
that the surface is influential in providing cushioning. However, for all mechanical and biomechanical (p < 0.05) variables representing impact absorbing ability, it was found that the difference between shoes was markedly greater
than the differences between surfaces. The peak heel pressure data were found to rank the surfaces in the same order as the
mechanical tests, while impact force data were not as sensitive to the changes in surface. Correlations between mechanical
and biomechanical impact absorption highlighted the importance of testing the shoe-surface combination in mechanical tests,
rather than the surface alone. In conclusion, mechanical testing of the shoe-surface combination was found to provide a strong
predictor of the impact absorbing ability during running if pressure data were used. In addition, for typical shoe-surface
combinations in tennis, the shoe was found to have more potential than the surface to influence impact loading during running.
Finally, in-shoe pressure data were found to be more sensitive than force plate data to changes in material cushioning. 相似文献