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1.
力竭性运动使器官自由基升高，脂质过氧化增强，而适度的有氧耐力运动或补充外源性抗氧化剂，可使机体抗氧化酶的生成量增加，活性增强，抑制脂质过氧化的升高，保护机体免受自由基的损害，进一步提高运动成绩。 相似文献
2.
李宗香 《通化师范学院学报》2005,26(6):81-82
运动本身对机体是一种“损害”过程，这种损害是因为自由基的产生而致．运动过程中，使机体产生大量的自由基．运动对机体的积极作用发生在运动后的恢复期中。运动后适当地补充抗氧化剂能使机体提高对自由基的清除能力，从减少或避免运动损伤并提高运动能力． 相似文献
3.
张琳 《宿州教育学院学报》2010,13(4):89-91
维生素是维持机体生命活动过程必不可少的一大类有机物质。VRE属于脂溶性维生素,主要作为抗氧化剂在体内发挥作用,可降低机体的脂质过氧化反应（LPO）,减少组织中自由基产生,具有膜保护作用,提高运动能力,并且VitE对早期迟发性运动障碍（TD）有一定疗效。VitE对人体健康有广泛影响;运动员在补充VitE时,要做到适宜适时适量原则。运动对机体VitE的影响还不确定,有待进一步研究。 相似文献
4.
沈一岚 《西安文理学院学报》2011,14(1):125-128
通过文献资料法,论述了谷氨酰胺的合成及代谢功能,谷氨酰胺对免疫机能的影响,运动对谷氨酰胺的影响,以及外源性补充谷氨酰胺对运动机体的调节作用.指出：在运动应激状态下,机体对谷氨酰胺的需求量明显增加,从营养的角度提供充足的谷氨酰胺能缓解中枢疲劳,降低免疫细胞的凋亡率,增强机体的抗氧化能力等.同时,谷氨酰胺具有增强和调理免疫的作用. 相似文献
5.
各种营养物质对机体新陈代谢的过程起着极其重要的作用,负荷量大的运动与营养物质的及时补充密切相关,及时合理地补充营养是运动员提高运动成绩的"兴备剂".本文从三个方面着手,进行了深入浅出的分析,为抓好学校业余体育训练提供科学理论性的帮助. 相似文献
6.
体能是运动员运用技、战术的基础,合理补充营养是运动员提高体能、消除运动疲劳的有效手段.本文根据运动的特点及其在运动过程中机体供能的特点,探讨运动体能恢复的有效措施和运动营养措施,以期给教学和训练中运动员的恢复与营养提供参考和建议. 相似文献
7.
目的:研究牛奶和鸡蛋对运动能力的影响,探讨牛奶和鸡蛋对运动疲劳恢复影响的可能机制.方法:将普通成体雄性ICR小白鼠(18只)随机均分对照组(CG)、额外补充牛奶组(MG),额外补充鸡蛋组(EG);采用10d递增负荷的游泳运动方式使小白鼠力竭.分析牛奶与鸡蛋对小白鼠力竭运动后血糖、血红蛋白(Hb)、血肌酐(CRE)含量影响及体重变化,记录力竭时间、观察行为状态.结果:与实验前比较,各组小鼠实验后血糖、血红蛋白(Hb)浓度下降,血肌酐(CRE)浓度上升;两实验组小鼠体重增加均显著高于CG组;两实验组与CG相比,运动时间显著延长.结论:小鼠运动疲劳后,机体出现各种疲劳指标的变化,额外补充牛奶和鸡蛋可以减少这些疲劳指标的改变.可能是通过增加糖储备来提高运动能力,保证机体在长时间运动时的能量来源;减缓运动过程中对蛋白质的过度利用;增加体内磷酸肌酸的贮备,提高磷酸肌酸的代谢能力等方面缓解运动疲劳的,尚待进一步研究. 相似文献
8.
目的：观察补充胆红素对不同负荷运动造成的肝细胞凋亡的影响,为运动营养补剂的研发,减少运动性损伤提供一定的实验依据.方法：以53只健康雄性SD大鼠为研究对象,随机分成7个组,即安静对照组、中等负荷运动组、中等负荷运动＋胆红素组、大负荷运动组、大负荷运动＋胆红素组,力竭运动组、力竭运动＋胆红素组,通过实验检测肝细胞凋亡情况,测量肝组织SOD的活性和MDA含量.结果表明：力竭运动和大负荷运动能诱导大鼠肝细胞凋亡增加;补充胆红素使其肝细胞凋亡率降低,说明胆红素能提高机体抗氧化能力. 相似文献
9.
人体在进行体育运动时,不仅消耗大量的热能,而且丧失大量的水分,破坏人体内的动态平衡,如不能及时补充水分,则可能导致身体脱水、工作能力下降。运动时机体有足够的水分直接影响体育锻炼的效果。所以,运动前﹑运动中﹑运动后都应该正确合理地补充水分。 相似文献
10.
体育运动中体内肌酸的作用与应用 总被引：1，自引：0，他引：1
娄国际 《河南科技学院学报》2010,38(1)
肌酸是有益于机体的营养素,能增加肌肉中磷酸肌酸含量,保证肌肉高强度反复收缩时的能量供给,在短时间、大强度运动的能量供应中起着非常重要的作用,且能够在一定程度上提高无氧能力并延缓疲劳的发生.正确合理补充肌酸能提高运动员的训练效果和运动能力,但肌酸还不能认为是一种普遍效力的补剂,所以补充肌酸须进行相应的指导. 相似文献
11.
钱和 《浙江大学学报(A卷英文版)》2004,5(6)
Dried ground leaves of Psidium guajava L. (guava) were extracted by water and aqueous ethyl alcohol 50% (1:10) ratio, and the total phenolic content in the extracts was determined spectrophotometrically according to Folin- Ciocalteu's phenol method and calculated as gallic acid equivalent (GAE). Remarkably high total phenolic content 575.3 (15.5 and 511.6(6.2 mg of GAE/g of dried weight material (for ethanol guava leaf extracts and water guava leaf extracts, respectively) were obtained. The antioxidant activity of lyophilized extracts was determined at ambient temperature by means of a 2,2-diphenyl-1-picrylhydryzyl (DPPH˙) colorimetry with detection scheme at 515 nm. The activity was evaluated by the decrease in absorbance as the result of DPPH˙ color change from purple to yellow. The higher the sample concentration used, the stronger was the free radical-scavenging effect. The results obtained showed that ascorbic acid was a substantially more powerful antioxidant than the extracts from guava leaf. On the other hand, the commercial guava leaf extracts and ethanol guava leaf extracts showed almost the same antioxidant power whereas water guava leaf extracts showed lower antioxidant activity. The parameter EC50 and the time needed to reach the steady state to EC50 concentration (TEC90) affected the antiradical capacity of the sample. The antioxidant efficiency (AE) has been shown to be a more adequate parameter for selecting antioxidants than the widely used EC50. This study revealed that guava leaf extracts comprise effective potential source of natural antioxidants. 相似文献
12.
以维生素C（Vc）为对照,研究了罗布麻叶两种主要成分异槲皮苷和异白麻苷的抗氧化作用。结果表明异槲皮苷和异白麻苷抗DPPH作用优于Vc,可作为优秀的天然抗氧化物质,提示可将罗布麻开发成一种抗衰老的保健品。 相似文献
13.
Dried ground leaves ofPsidium guajava L. (guava) were extracted by water and aqueous ethyl alcohol 50% (1∶10) ratio, and the total phenolic content in the extracts
was determined spectrophotometrically according to Folin-Ciocalteu's phenol method and calculated as gallic acid equivalent
(GAE). Remarkably high total phenolic content 575.3±15.5 and 511.6±6.2 mg of GAE/g of dried weight material (for ethanol guava
leaf extracts and water guava leaf extracts, respectively) were obtained. The antioxidant activity of lyophilized extracts
was determined at ambient temperature by means of a 2,2-diphenyl-1-picrylhydryzyl (DPPH') colorimetry with detection scheme
at 515 nm. The activity was evaluated by the decrease in absorbance as the result of DPPH' color change from purple to yellow.
The higher the sample concentration used, the stronger was the free radical-scavenging effect. The results obtained showed
that ascorbic acid was a substantially more powerful antioxidant than the extracts from guava leaf. On the other hand, the
commercial guava leaf extracts and ethanol guava leaf extracts showed almost the same antioxidant power whereas water guava
leaf extracts showed lower antioxidant activity. The parameter EC50 and the time needed to reach the steady state to EC50 concentration (T
EC
50) affected the antiradical capacity of the sample. The antioxidant efficiency (AE) has been shown to be a more adequate parameter
for selecting antioxidants than the widely used EC50. This study revealed that guava leaf extracts comprise effective potential source of natural antioxidants. 相似文献
14.
Run-ting Huang Qing Huang Gen-liang Wu Chun-guang Chen Zong-jun Li 《Journal of Zhejiang University. Science. B》2017,18(4):324-333
Xiangxi flavor vinegar (XV) is one of Hunan Province’s traditional fermented vinegars. It is produced from herb, rice, and spring water with spontaneous liquid-state fermentation techniques. In this study, we investigated the antioxidant property of XV by analyzing its antioxidant compounds, its free radical scavenging property in vitro and in vivo, and its effects on antioxidant enzyme activity and apoptosis in Caenorhabditis elegans. The results showed that XV is rich in antioxidants. In particular, ligustrazine reached 6.431 μg/ml. The in vitro 2,2-diphenyl-1-picrylhydrazyl free radical (DPPH?), hydroxyl radical (?OH), and superoxide anion radical (O 2 ?? ) scavenging rates of XV were 95.85%, 97.22%, and 63.33%, respectively. The reactive oxygen species (ROS) content in XV-treated C. elegans decreased significantly (P<0.01) compared to the control group. Glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), and catalase (CAT) activities were remarkably increased (P<0.01) in C. elegans after XV treatment. In addition, XV could upregulate CED-9 protein expression and downregulate CED-3 protein expression in C. elegans. These results prove that XV is rich in antioxidants and scavenges radicals in vitro efficiently. XV inhibits apoptosis in C. elegans probably by scavenging ROS and increasing the activities of its antioxidant enzymes. 相似文献
15.
Survey of antioxidant capacity and phenolic composition of blueberry, blackberry, and strawberry in Nanjing 总被引：1，自引：0，他引：1
Wu-yang Huang Hong-cheng Zhang Wen-xu Liu Chun-yang Li 《Journal of Zhejiang University. Science. B》2012,13(2):94-102
Berries are a good source of natural antioxidants. In the present study, the total antioxidant capacity and phenolic composition
of three berry fruits (blueberry, blackberry, and strawberry) cultivated in Nanjing were investigated. Blueberry, with a Trolox
equivalent antioxidant capacity (TEAC) value of 14.98 mmol Trolox/100 g dry weight (DW), exhibited the strongest total antioxidant
capacity using both the 2,2-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) and the 2,2-diphenyl-1-picrylhydrazyl
(DPPH) methods. Blueberry also had the highest total phenolic content (TPC, 9.44 mg gallic acid/g DW), total flavonoid content
(TFC, 36.08 mg rutin/g DW), and total anthocyanidin content (TAC, 24.38 mg catechin/g DW). A preliminary analysis using high
performance liquid chromatography (HPLC) showed that the blueberry, blackberry, and strawberry samples tested contained a
range of phenolic acids (including gallic acid, protocatechuic acid, p-hydroxybenzoic acid, vanillic acid, caffeic acid, p-coumaric acid, ferulic acid, ellagic acid, and cinnamic acid) and various types of flavonoids (flavone: luteolin; flavonols:
rutin, myricetin, quercetrin, and quercetin; flavanols: gallocatechin, epigallocatechin, catechin, and catechin gallate; anthocyanidins:
malvidin-3-galactoside, malvidin-3-glucoside, and cyanidin). In particular, the blueberries had high levels of proanthocyanidins
and anthocyanidins, which might be responsible for their strong antioxidant activities. These results indicate a potential
market role for berries (especially blueberries) as a functional food ingredient or nutraceutical. 相似文献
16.
果蔬原料中含有丰富的酚类化合物 ,它们不仅影响着果蔬食品的品质 ,而且它们所具有的抗氧化活性对于防止食品氧化和促进人体健康等有着重要的作用。本文就果蔬中酚类化合物的种类、对果蔬食品品质的影响、抗氧化能力、在食品和人体内发挥的作用以及对酚类抗氧化能力的测定方法等方面作一综述。 相似文献
17.
Hui-ying Miao Meng-yu Wang Jia-qi Chang Han Tao Bo Sun Qiao-mei Wang 《Journal of Zhejiang University. Science. B》2017,18(12):1093-1100
Glucosinolates, anthocyanins, total phenols, and vitamin C, as well as antioxidant capacity, were investigated in Chinese kale sprouts treated with both glucose and gibberellic acid (GA3). The combination of 3% (0.03 g/ml) glucose and 5 μol/L GA3 treatment was effective in increasing glucosinolate content while glucose or GA3 treatment alone did not influence significantly almost all individual glucosinolates or total glucosinolates. The total phenolic content and antioxidant activity of Chinese kale sprouts were enhanced by combined treatment with glucose and GA3, which could be useful in improving the main health-promoting compounds and antioxidant activity in Chinese kale sprouts. 相似文献
18.
研究通过建立大鼠过度训练模型,观察黄柳菇总黄酮对过度训练大鼠运动能力及抗氧化防御体系的影响．研究结果表明,黄柳菇总黄酮千预下大鼠运动时间明显长于过度训练组,且各组织中丙二醛（MDA）含量显著低于过度训练组（P〈0．05）,而超氧化物岐化酶（SOD）、谷胱甘肽过氧化物酶（GSH—Px）及一氧化氮合酶（NOS）的活性则显著高于过度训练组（P〈0．05）．研究认为,黄柳菇总黄酮具有提高大鼠运动能力的作用,其机制可能与黄柳菇总黄酮通过提高大鼠抗氧化能力,改善运动大鼠抗氧化防御体系有关． 相似文献
19.
Salvianolic acid B(Sal B) is an active component of traditional Chinese medicine Salvia miltiorrhiza and is used to treat vascular diseases. To better understand its mechanism, the antioxidant capacities of Sal B was evaluated with human endothelial cells under oxidative stress. Human endothelial cells were pretreated with Sal B for 12 h followed by hydrogen peroxide for another 12 h. Production of reactive oxygen species (ROS), activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX), and concentration of glu-tathione were measured: Protective effect of Sal B on the endothelial cells from hydrogen peroxide-induced damage ' was observed, and ROS production in the cells was found significantly inhibited. Sal B remarkably enhanced the activities of antioxidant enzymes SOD, CAT and GPX. Furthermore, Sal B up-regulated the intracellular glutathione concentration. The results indicate that Sal B protected endothelial cells from oxidative stress by improving the redox status of the cells through enhancing the antioxidant enzyme activities and increasing the reductive glutathione concentration after the oxidative challenge. 相似文献
20.
Yue-fei Wang Jie Wang Jing Wu Ping Xu Yi-qi Wang Jun-jie Gao Danielle Hochstetter 《Journal of Zhejiang University. Science. B》2014,15(2):173-180
The conditions for extracting polysaccharides from tea (Camellia sinensis L.) fruit peel (TFPPs) were studied. Three parameters (temperature, time, and liquid/solid ratio) affecting the extraction of TFPP were optimized using response surface methodology (RSM). Under the optimized conditions, the yield of TFPP was predicted to be 4.98%. The physicochemical properties, in vitro antioxidant activities, and inhibitory effects on α-glucosidase of fractionated TFPPs (TFPP-0, TFPP-20, TFPP-40, and TFPP-60) were investigated. We found that the TFPPs were all acid protein-bound heteropolysaccharides, although with different chemical compositions. They had not only remarkable scavenging activity on 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) and reducing activity, but also excellent inhibitory potential against α-glucosidase in vitro. Our results suggest that tea fruit peel could be treated as a potential bioresource for the development of polysaccharide antioxidants. 相似文献