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本文通过对少年跨栏运动员 ,补充肌酸后的血红蛋白及运动成绩数据指标分析 ,结果显示 :合理补充肌酸可促使少年跨栏运动员的血红蛋白及运动成绩的提高。 相似文献
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R.J. Yquel L.M. Arsac E. Thiaudiere P. Canioni G. Manier 《Journal of sports sciences》2013,31(5):427-437
In this study, we examined the effect of creatine ingestion on muscle power output, muscle phosphocreatine resynthesis, inorganic phosphate and pH during repeated brief bouts of maximal exercise. Nine healthy males performed maximal plantar flexion before and after creatine ingestion (20 g ·day -1 for 6 days). The experimental protocol consisted of five 8 s bouts (bouts 1-5) interspersed with 30 s recovery, followed by bouts 6 (8 s) and 7 (16 s) separated by 1 and 2 min, respectively. Muscle phosphocreatine, inorganic phosphate and pH were estimated every 16 s by 31 P magnetic resonance spectroscopy. After creatine ingestion, muscle power output increased by ~5% ( P ? 0.05) from bouts 3 to 7 and muscle phosphocreatine resynthesis increased ( P ? 0.05) during 10 min recovery. The higher phosphocreatine concentration observed after only 30 s of recovery was accompanied by lower inorganic phosphate accumulation and higher pH. Strong correlations were found between exercise power restoration and the corresponding pre-exercise phosphocreatine and inorganic phosphate concentrations and muscle pH after creatine ingestion. The better maintenance of muscle power output observed after creatine ingestion was attributed to a higher rate of phosphocreatine resynthesis, lower accumulation of inorganic phosphate and higher pH. 相似文献
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Stephan Sorichter Johannes Mair Arnold Koller Erich Muller Christian Kremser Werner Judmaier 《Journal of sports sciences》2013,31(9):687-691
The aim of this study was to examine the relationship between myosin heavy chain (MHC) release as a specific marker of slow-twitch muscle fibre breakdown and magnetic resonance imaging (MRI) of skeletal muscle injury after eccentric exercise. The effects of a single series of 70 high-intensity eccentric contractions of the quadriceps femoris muscle group (single leg) on plasma concentrations of creatine kinase and MHC fragments were assessed in 10 young male sport education trainees before and 1 and 4 days after exercise. To visualize muscle injury, MRI of the loaded thigh was performed before and 4 days after the eccentric exercise. All participants recorded an increase ( P ? 0.05) in creatine kinase after exercise. In five participants, T2 signal intensity was unchanged post-exercise compared with pre-exercise and MHC plasma concentration was normal; however, they showed an increase ( P ? 0.05) in creatine kinase after exercise. For the remaining five participants, there was an increase in T2 signal intensity of the loaded vastus intermedius and vastus lateralis. These changes in MRI were accompanied by an increase in MHC plasma concentration ( P ? 0.01) as well as an increase in creatine kinase ( P ? 0.01). We suggest that changes in MRI T2 signal intensity after muscle damage induced by eccentric exercise are closely related to damage to structurally bound contractile filaments of some muscle fibres. Additionally, MHC plasma release indicates that this damage affects not only fast-twitch fibres but also some slow-twitch fibres. 相似文献
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肌酸的补充与运动能力(综述) 总被引：15，自引：0，他引：15
肌酸已成为最流行的能力增强剂。国外大量有关肌酸的文献认为,运动人体使用肌酸使运动后磷酸肌酸的再合成速度加快,力量和速度增强。肌酸使肌细胞通过水的摄取来促进蛋白合成率,从而改变体成分。肌酸同单糖一起使用可以刺激胰岛素的分泌,使肌肉摄取更多的肌酸。目前尚未见肌酸对肝、肾和血液系统功能的副作用和肌酸引起肌肉痉挛和损伤的研究报道。 相似文献
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毽球运动是中华民族传统体育宝库中一颗璀璨的明珠,其发展历史悠久、源远流长,近年来由于其所具有的趣味性、观赏性、健身性、对抗性和娱乐性等特点,已经被广泛流传,并形成独具特色的毽球竞技运动项目。本课题旨在通过对高水平毽球运动队生理生化指标的测试,为教练员和运动员提供训练依据,以便于更好的根据运动员的身体机能状况合理地调整训练计划,更好的为毽球运动技术成绩的提高服务。通过研究我们发现采用心率、血乳酸、肌酸激酶、血尿素氮和尿蛋白等指标的测试,能够反映运动员机体的机能状态和对训练负荷强度的适应情况,防治过度疲劳的出现,为教练员更好的为运动员调整运动负荷强度奠定坚实的理论基础,对运动成绩的提高具有不可忽略的效果。 相似文献
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补充糖和/或肌酸对赛后血清肌酸激酶活性的影响 总被引：2，自引：0，他引：2
8名男性足球运动员，按正交表L4(23)进行实验设计，进行关于糖、肌酸补充对足球运动员血清肌酸激酶活性影响的效果观察实验。A组仅补充空白饮料；B组每天补充20克肌酸；C组每天仅补充100克以低聚糖为主的饮料；D组同时补充肌酸和低聚糖饮料，补充方法同B、C组。连续补充5天。补充前后进行血清肌酸激酶浓度的测试。补充前测试时均喝空白饮料，补充后测试时补充相应饮料。测试前进行模拟现场比赛。模拟现场比赛分为两个半场，各45分钟，间隔15分钟。每个半场包15个3分钟的循环，测量每个半场后的血清肌酸激酶的浓度。结果表明：单独补充糖或肌酸，同时补充糖和肌酸均可使运动员赛后的即刻血清肌酸激酶活性显著下降，而且糖和肌酸同时补充效果好。提示同时补充糖、肌酸有利于足球运动员提高赛场竞技能力。 相似文献
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Objective: To investigate changes in magnetic resonance spectroscopy (MRS) of lentiform nucleus during the early stage of Parkinson's disease. Methods: Twenty-five patients with idiopathic Parkinson disease with unilateral symptoms (IPDUS) and 25 healthy volunteers were enrolled in this study. MRS of the lentiform nucleus in each patient was taken and then concentrations of N-acetylaspartate (NAA), Creatine (Cr) and Choline (Cho) were calculated. Results: Compared to that in the control, NAA/(Cho Cr) was significantly lower in the lentiform nucleus contralateral to symptoms and even that in the ipsilateral side in IPDUS patients (all P＜0.05); while there was no difference between the two sides in the healthy volunteer (P＞0.05). The ratio of NAA/(Cho Cr) ipsilateral to the sympatomatic side of the patient was also lower than that of the control (P＜0.05). Conclusions: there might be some changes with MRS on the lentiform nucleus during the early stage of idiopathic Parkinson's disease with unilateral symptom. MRS may be one of the reliable methods for early or even sub-clinical diagnosis. 相似文献
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目的:研究以浙江省场地自行车短距离项目男子运动员为研究对象,通过六年的训练负荷反馈指标和机能反馈指标的采集、测试和分析,探讨上述指标对我省场地自行车短距离项目男子运动员成长存在的影响,为我省场地自行车男子短距离项目的持续高效的发展提供一定的理论依据。方法:在六年的训练周期中,对我省自行车运动员的血红蛋白、血清睾酮、血清肌酸激酶和血尿素氮进行定期测试,并形成比较完整的数据库进行对比分析。结果:①优秀组和普通组的血清睾酮、血清肌酸激酶和血尿素氮6年间变化趋势基本一致,而血红蛋白存在不同的变化趋势;②在机能反馈变化方面,与优秀组相比较,普通组的血红蛋白平均值在2012年、2016年和2017年有非常显著性差异(P<0.01),而血清睾酮则在2012年、2013年和2016年存在非常显著性差异(P<0.01);③在训练负荷反馈方面,仅在2017年,优秀组的血清肌酸激酶平均值与普通组相比较,出现非常显著性差异(P<0.01)。结论:①对场地自行车短距离男子运动员来说,血红蛋白在训练初期可能不是最主要的机能指标,但是到训练中后期可能会成为评价运动员恢复能力的一项主要指标;②血清睾酮水平的高低对场地自行车短距离男子运动员的成才至关重要,是训练初期就需要重点关注的一个指标;③血清肌酸激酶和血尿素氮分别是训练强度和训练量的机体反馈指标,优秀运动员在训练内容转换的过程中,适应能力要好于普通运动员。 相似文献
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高淑杰 《广州体育学院学报》2006,26(2):73-76
研究了健康大学生外固定腿2周使肌肉愈接近废用性萎缩,并在固定期和恢复期10周过程中连续补充肌酸和抗阻训练,测定股外侧肌葡萄糖转运蛋白4(glucose transporter 4,GLUT4)的变化,并且测定了肌糖原、磷酸肌酸(CP)和肌酸(C)浓度。探讨补充肌酸对骨骼肌废用性萎缩后糖代谢调节机制的影响。研究结果显示:补充肌酸和抗阻训练可以提高废用性萎缩肌肉GLUT4蛋白水平,肌肉吸收葡萄糖和肌糖原合成能力增强。肌肉CP、C和C总浓度在恢复期第3周达到高水平。 相似文献